Quiz: Physiology

1)Testosterone is secreted by

A a. sertoli cells of testis B b.cells of adrenal medulla C c.cells of hypothalamus, D d.leydig cells of testis,

2) Temporary methods of birth control which are best suited to prevent transmission of disease are

A a.IUD, B b.spermatocides, C c.condom, . D d.Ru 486,

3) Cryptorchidism means

A a.descent of testis, B b.hypogonadism C c.hyperfunction of the testis, D , d.undescended testis,

4) Androgen binding protein is produced by

A a.adrenals, , B b.hypothalamus, C c.sertoli cells D d.leydig cells,

5) All of the following are produced by the corpus leuteum except

A a.estrogens, B b.progesteron C c.relaxin, D d.F.S.H.,

6) The testis is kept at a temperature of 2-3 degrees C below core temperature due to

A a.contraction of cremasteric, B b.contraction of dartos muscle, C c. contraction of internal oblique muscle D d.relaxation of cremasteric muscle and due to position of the testis outside the pelvic cavity

7) Early detection of pregnancy depends on detection of

A a.FSH,, B b.progesteron, C c.LH D d.HCG,

8) Secondary amenorrhoea can most commonly be caused in the following conditions EXCEPT

A a.age above 60 years B b.stress, C ,c.pregnancy, D d. competitive athletes,

8) Secondary amenorrhoea can most commonly be caused in the following conditions EXCEPT

A a.age above 60 years B b.stress, C ,c.pregnancy, D d. competitive athletes,

9) In the first 20 weeks of pregnancy,placental function is best assessed by urinary

A a.pregnanediol, , . B b.pregnanetriol, C c. chorionic gonadotropin D d.estriol,

10) Best method for diagnosing fetal lung maturity is

A a.clinical examination, B b.ultrasonography, C c.amniocentesis, D d.fetal kick counts

11)Full lung maturity is indicated by L/S ratio

A a.2:1, B b.3:1, C c.4:1, D d.5:1,

12) The best method to diagnose Rh sensitization in the mother is

A a. direct coombs test, , B b. indirect coombs test, C c.'c'antigen D d.'a'antigen,

12) The best method to diagnose Rh sensitization in the mother is

A a. direct coombs test, B b. indirect coombs test, C c.'c'antigen, D d.'a'antigen

13) Inhibin is secreted by

A a.graffian follicle, B b.corpus leuteum, C c.endometrium, D d.placenta

14) Maximal rise in the levels of prolactin are seen in

A a.at term, B b.after delivery, C c.during lactation only, D d.none of the above,

15) Oestrogens are given in high doses to the mother to suppress Dactation in

A a. cleft palate in child, B b.highly obese mother, C c.to prevent transmission of communicable diseases like HIV D d. inverted nipples

15-The process of sperm production takes place in the

A A-Epididymis B B-Vas deferens C C-Prostate glands D D-Seminiferous tubules

16-What is the primary function of Leydig cells?

A A-Regulate pituitary secretion of prolactin B B-Testosterone synthesis C C-Nitric oxide release D D-Inhibin secretion

17-The fluid from which of the following accessory gland neutralize the acidity ina vagina of the female?

A A-Seminal vesicle B B-Prostate gland C C-Cowper's gland D D-Bulbourethral gland

18-Name the hormone which is at peak during ovulation.

A A-Progesterone B B-Estrogen C C-FSH D d-LH

19-Which of the following represents the correct order of events during the menstrual cycle?

A A-FSH rise,ovulation, LH surge,luteal phase,menstruation B B-Luteal phase, menstruation,FSH rise,ovulation, follicular phase C C-Luteal phase,menstruation,FSH rise,follicular phase,ovulation D D-Menstruation,FSH rise,LH surge,ovulation,luteal phase

20-Which of the following represents the typical order of physical and physiologic changes of puberty in females?

A A-Menarche,thelarche,andrenarche, peak growth velocity B B-Thelarche,andrenarche,peak growth velocity, menarche C C-Peak growth velocity,adrenarche,menarche, thelarche D D-Adrenarche,menarche,thelarche,peak growth velocity

21-Which hormone effectively suppresses lactation?

A A-Prolactin B B-Estrogen C C-Growth hormone D D-Insulin

22-What tissue supplies progesterone during pregnancy until placental production alone is sufficient?

A A-The implantation site of the placenta B B-The remaiming granulosa cells are blocked from converting progesterone into estrogen C C-The fetal ovary D D-The corpus luteum in the ovary

23-Which cells in the seminiferous tubules progress through the first meiotic division?

A a.Sertoli cells B b.Spermatogonia C c .Spermatid D d.Primary spermatocyte

24-All the following hormones are secreted by testes except

A Androgen binding protein B Inhibin C Testosterone D Serotonin

25-All of the following are correct about Testosterone except

A Testosterone secretion starts at 7th week of fetal life by fetal genital ridge. B Testosterone causes maturation of Wolffian duct, which gives rise to male sex organs C Testosterone is necessary for descent of testes D Testosterone causes delay fusion of epiphyses of long bones with shaft.

26-Which gland releases a small amount of fluid just prior to ejaculation neutralize the acidity of the fluid of vas deference and of vaginal secretion?*

A Testes B Prostate gland Glans C penis Bulbourethral gland D Seminal vesicles

2 7-Name the site of sperm maturation?

A Epididymis B Ductus deferens C Spermatic cord D Urethra

28-Seminal vesicles produce*

A Sperm cells. B Testosterone C Fructose-rich fluid. D Estrogen

29-The testes in humans aresituated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for

A Providing a secondary sexual feature for exhibiting the male sex B Maintaining the scrotal temperature lower than the internal body temperature C Providing more space for the growth of epididymis D Escaping any possible compression by the visceral organs

30-The LH surge is primarily responsible for which menstrual cycle event?

A Apoptosis B Endometrial sloughing C A decrease in PGF2a D Ovulation

31-Which of the following statements is FALSE?

A Deviation from the typical 28-day menstrual cycle typically occurs because of different lengths in the follicular phases B Although one oocyte is typically ovulated per cycle,several will begin their development C Prolonged elevations in progesterone levels trigger the LH surge D During menstruation thromboxane and prostaglandin homeostasis control myometrial and vascular contractions in the uterus

32-Which of the following is the typical first visible sign of male puberty?

A Facial hair B Pubic hair C Enlargement of the testes D Lengthening of the penis

33-All of the following are true about human chorionic gonadotropin EXCEPT:

A In early pregnancy, the levels are expected to double every 2-3 days B It is structurally related to oxytocin, and binds to receptors to support the corpus luteum C It is initially produced by the trophoblast cells of the embryo D During the first trimester, it stimulates the fetal gonads to make steroid hormones responsible for sexual differentiation

35-Physiologic changes that commonly occur during menopause include all of the following,EXCEPT:

A Increased follicle-stimulating hormone(FSH) B Increased prostaglandins C Increased estradiol D Increased dopamine

35-Physiologic changes that commonly occur during menopause include all of the following,EXCEPT:

A Increased follicle-stimulating hormone(FSH) B Increased prostaglandins C Increased estradiol D Increased dopamine

35-Physiologic changes that commonly occur during menopause include all of the following,EXCEPT:

A Increased follicle-stimulating hormone(FSH) B Increased prostaglandins C Increased estradiol D Increased dopamine

36-The age of menopause is affected by all of the following,EXCEPT:

A Maternal menopausal age B Length of menstrual cycle C Smoking D Age at time of menarche

37-The secretory phase in the human menstrual cycle is also called

A Luteal phase and lasts for about 6 days B Follicular phase lasting for about 6 days C Luteal phase and lasts for about 13 days D Follicular phase and lasts for about 13 days

38-How long does the average human gestation last?

A 266 days after the beginning of thelast menstrual period B 280 days after the beginning of the last menstrual period C 240 days after the begimning of the last menstrual period D 294 days after the beginning of the last menstrual period

39-Which hormone is associated with production of milk?

A Growth hormone B Luteinizing hormone C Follicular stimulating hormone D Prolactin

40-Which hormone is responsible for ejection of milk?

A Growth hormone B Luteinizing hormone C Follicular stimulating hormone D Oxytocin

41-Which hormone initiates spermatogenesis?

A A FSH B B Testosterone C C LH D D DHEA-S

42-Using the following list of events, indicate the proper sequence concerning 1.High levels of estradiol 2. High levels of estradiol and progesterone 3. Luteinizing Hormone (LH)surge 4. Menstruation 5. Presence of a corpus albicans

A A 1,2,3,4,5 B B 1,2,3,5,4 C C 1,3,2,5,4 D D 4,2,3,1,5

43-Follicle stimulating hormone (FSH) is primarily responsible for

A A-conversion of cholesterol to pregnenolone B B-testosterone production C C-maintaining the corpus luteum D d-spermatogenesis

44-Which of the following cells is INCORRECTLY matched to the secretion or product it produces?

A granulosa cells-activin B interstitial cells of Leydig-aromatase C neurons of the arcuate nucleus - gonadotropin releasing hormone(GnRH) D Sertoli cells -antimullerian hormone (AMH)

45-Between ejaculations, sperm is primarily stored in the

A epididymis B rete testis C seminal vesicles D seminiferous tubules

46-Erection is controlled by the ……………. division of the autonomic nervous system and ejaculation is controlled by the division of the autonomic nervous

A parasympathetic-parasympathetic B parasympathetic-sympathetic C sympathetic-parasympathetic D sympathetic-sympathetic

47-Days 15 to 28 of the menstrual cycle (i.e. both ovarian and uterine cycles) are referred to as the ………………….. or…………………………..

A follicular phase-luteal phase B luteal phase-secretory phase C proliferative phase-follicular phase D secretory phase-proliferative phase

48-What day of the ovarian cycle might you expect to see low levels of estrogen and progesterone and high levels of follicle stimulating hormone (FSH) and luteinizing hormone (LH)?

A day 1 B day 7 C day14 D day 21

49-All of the following hormones are produced from the chorionic portion of the

A estrogen B placental lactogen C progesterone D relaxin

50-During gestation,androgens are produced by the

A fetus only B mother only C placenta only D fetus and the mother

The secretion of sex hormones from the adrenal cortex is controlled by:

A (A) The gonadotropic hormones . B B) The luteinizing hormone releasing hormone LHRH C (C) ACTH D D) Testosterone.

Estrogens produce all the following effects except:

A (A) Uterine development at puberty. B B) Development of the acini of mammary glands. C C) Union of the epiphyses of long bones. D testis bD) The proliferative phase of the menstrual cycle.arrier.

The functions of Sertoli cells include all the following except:

A (A) Secretion of inhibin and an androgen-binding protein. B B) Formation of a blood-testis barrier. C (C) Nutrition of the sperms. D testis barriD) Secretion of testosterone.er.

About the human sperms, all the following is true except:

A A) Mature sperms require about 70 days to be formed.( B B) Their heads contain enzymes that facilitate fertilization of the ova. C (C) Sperm capacitation requires several hours in the female genital tract. D E) They reach the uterine tubes about 3 hours after ejaculation.

The motility of human sperms:

A (A) Is acquired in the epididymis and vas deferens B B) Is stimulated in an acid pH. C (C) Is complete in the seminiferous tubules. D D) Occurs at a speed of about 3 cm/second.

The initiation of lactation after lahor is caused by:

A A) An increased secretion of thyroxine. B B) An increased secretion of FSH. C C) Release of oxytocin from the(neurohypophysis. D D) The sudden drop in the blood estrogen level.

About ovulation, all the following is true except:

A (A) it normally occurs on the 13th-17th day of the uterine cycle. B B) It occurs as a result of the LH surge. C (C) It is associated with a lower abdominal pain. D D) It is due to rupture of the corpus luteum.

Maintenance of pregnancy requires all the following except:

A (A Secretion of large amounts of LH. B (B) Secretion of the human chorionic gonadotropins (hCG C )C. ) Development of the corpus luteum of pregnancy. D D) Formation of the placenta.

:The female secondary sex characteristics depend on:

A A) The secretion of large amounts of progesterone. B B) Increased secretion of the growth hormone. C C) The presence of sufficient amounts of estrogens. D D) Inhibition of LH secretion.

About lactation:

A (A) It is not affected by tactile stimulation of the nipples. B B) It is entirely dependent on the growth hormone. C C) It depends on continuous elevation of the serum glucose level. D E) None of the above.

Concerning testosterone, all the following is true except:

A (A) It is synthesized by the interstitial cells of Leydig from cholesterol. B (B) It is present in the plasma mainly bound to a beta globulin. C C) It becomes less active following reduction to dihydrotestosterone (DHT). D D) lt inhibits the release of LH.

True precocious puberty:

A (A) Is the delay of onset of gonadal function beyond the age of 20 years in males and the age of 17 years in females. B B) Is the development of male characters in (young boys or female characters in you girls.( C C) Results from androgen-secreting tumours in young males or estrogen secreting tumours in young females. D D) Often results from early secretion of the GTHS.

True precocious puberty:

A (A) Is the delay of onset of gonadal function beyond the age of 20 years in males and the age of 17 years in females. B B) Is the development of male characters in (young boys or female characters in you girls.( C C) Results from androgen-secreting tumours in young males or estrogen secreting tumours in young females. D D) Often results from early secretion of the GTHS.

The Sertoli cells:

A (A) Are present in the interstitial cells of the ovary. B (B) Are rich in glycogen. C (C) Are the source of the fructose found in semen D D) Develop under the influence of ICSH.

The follicle-stimulating hormone ():(FSH):

A A) Is secreted from the hypothalamus. B B) Stimulates testosterone secretion from the testes. C C) is the name that refers to prolactin. D E) Stimulates the development and functions of the Sertoli cells.

The follicle-stimulating hormone ():(FSH):

A A) Is secreted from the hypothalamus. B B) Stimulates testosterone secretion from the testes. C C) is the name that refers to prolactin. D E) Stimulates the development and functions of the Sertoli cells.

In cryptorchidism:

A (A) The testes are more liable to malignant tumours. B B) The subject is taller than normal and his voice is sharp as in children. C C) The secondary sex organs remain infantile D D) The seminiferous tubules are not affected.

The secretion of the seminal vesicles:

A (A) Contributes to about 20% of the total volume of semen. B B) Is rich in a fibrinolysin that liquefies the semen. C (C) Has a high fructose content. D (D) Is rich in citric acid, cholesterol and phospholipids.

Concerning the testicular androgens, all the following is true except:

A A) They are essential for maturation of the external genitalia and appearance of the secondary sex characteristics in males. B B) They are essential for spermatogenesis. C C) They increase the secretion of the sebaceous glands. D (D) They produce a marked negative nitrogen balance.

Concerning the testicular androgens, all the following is true except:

A A) They are essential for maturation of the external genitalia and appearance of the secondary sex characteristics in males. B B) They are essential for spermatogenesis. C C) They increase the secretion of the sebaceous glands. D (D) They produce a marked negative nitrogen balance.

About the FSH, all the following is true except:

A (A) It is secreted by the basophil chromophil cells of the adenohypophysis. B B) It is essential for the development of Graafian follicles. C (C) It is required for the last stages of spermatogenesis. D (E) Its secretion occurs by a +ve feedback control by the blood estrogen level.

During the preovulatory (proliferative) phase of the menstrual cycle:

A A) The uterine glands increase in length but do not secrete. B (B) Constriction of the spiral arteries in the endometrium occurs. C (C) The blood progesterone level reaches its peak. D D) Sloughing of the superficial endometrial layers occurs.

During the preovulatory (proliferative) phase of the menstrual cycle:

A A) The uterine glands increase in length but do not secrete. B (B) Constriction of the spiral arteries in the endometrium occurs. C (C) The blood progesterone level reaches its peak. D D) Sloughing of the superficial endometrial layers occurs.

Concerning the hormonal control of the ovarian cycle:

A A) Complete follicular maturation is FSH-independent. B (B) The development of Graafian follicles requires both FSH and LH. C (C) Ovulation and corpus luteum formation are FSH-dependent. D D) More than one Graafian follicle usually develop each cycle.

:Concerning the menstrual cycle:

A A) It normally occurs every 2 weeks. B B) The last cycle (before the menopause) is called the menarche. C C) It is always accompanied by ovulation. D D) Ovulation occurs due to LH surge that results from a +ve feedback mechanism.

:Concerning the menstrual cycle:

A A) It normally occurs every 2 weeks. B B) The last cycle (before the menopause) is called the menarche. C C) It is always accompanied by ovulation. D D) Ovulation occurs due to LH surge that results from a +ve feedback mechanism.

Sperm capacitation:

A A) Occurs when the sperms are embedded in the Sertoli cells. B (B) Is accompanied by a decreased activity of the sperms. C C) is followed by the acrosomal reaction. D D) Includes disappearance of the sperm's head.

The various intrauterine devices decrease the female fertility by:

A A) Preventing ovulation through inhibiting the secretion of LH. B B) Preventing the movement of sperms in the female genital tract. C C) Killing the sperms in the uterus. D (E) Acting as a foreign body which prevents implantation of the ovum.

In the normal menstrual cycle, all the following occurs except:

A A) Ovulation is associated with a sudden rise in the blood LH level. B B) The cervical mucus becomes thinner and more alkaline in the preovulatory plaz. C C) The proliferative phase depends on estrogen secretion. D (D) The blood loss during menstruation is normally about 300 ml.

Fertilization of the human ovum:

A A) Normally occurs in the uterine cavity. B ) Can be performed by more than one sperm. C C) May occur up to 5 days after ovulation. D E) Is facilitated by a trypsin-like protease released from the sperm's head

The human spermatozou:

A A) Are produced at a faster rate when the testicular temp. is raised from 35 to 37°C. B (B) Are actively motile in the seminiferous tubules. C C) Contain 46 chromosomes. D E) Require both GTHs for complete developmen

The human chorionic gonadotropin hormone (hCG):

A (A) Is a steroid hormone secreted by the myometrium. B B) Acts on the uterus to maintain the integrity of the endometrium. C (C) Detection in the urine of a woman is an evidence of pregnancy. D (D) Production is greatest in the last 3 months of pregnancy

Testosterone produces all the following effects except:

A (A) Depression of LH secretion by the adenohypophysis. B (B) An increase in the scalp hair . C C) Union of the epiphyses of long bones. D (D) A positive nitrogen balance.

:About androgens, all the following is true except:

A A) They are formed in the seminiferous tubules of the testes B (B ) They are secreted by tissues other than the testes. C (C) They are secreted in small amounts in adult females D (D) They are secreted in males during fetal life.

During pregnancy?

A A) The uterine muscle is increased mainly due to (multiplication) of the smooth muscle fibers. B B) Strong uterine contractions occur under the effect of oxytocin. C C) The BMR is markedly decreased. D D) Abortion would occur if ovariectomy is

During pregnancy?

A A) The uterine muscle is increased mainly due to (multiplication) of the smooth muscle fibers. B B) Strong uterine contractions occur under the effect of oxytocin. C C) The BMR is markedly decreased. D D) Abortion would occur if ovariectomy is

Milk formation by the mammary glands:

A A) Is stimulated by estrogens and progesteron B B) Is inhibited by the suckling reflex. C C) Is stimulated by both the TRH and human chorionic somatomammotropin (hCS D D) is not affected by hypophysectomy.

All the following factors contribute to normal parturition except:

A (A) Decreased placental progesterone secretion B (B) Presence of normally-functioning ovaries C C) Secretion of oxytocin by a + ve feedback mechanism. D D) Uterine distension and increased

The glandular interstitial cells in the testest:

A (A) Are the Sertoli cells. B (B) Secrete the seminal fluid. C C) Are stimulated to secrete by the growth hormone. D D) Are indirectly influenced by a hypothalamic hormone.

About spermatozoa, all the following is true except:

A A) They become infertile if separated from the other constituents of semen. B B) They require both FSH & testosterone for normal development C (C) They are normally stored in the seminal vesicles before ejaculation. D D) They require several hours in the female

Testosterone:

A A) is secreted by the spermatogonia. B B) Secretion shows a circadian rhythm. C C) Administration to healthy adults increases the sperms' count in their semen. D (E) Secretion increases at puberty because the blood LH level markedly rises

The corpus luteum:

A A) Is responsible for the proliferative phase of the uterine cycle. B (B) is under the control of the neurohypophysis. C (C) Begins to atrophy as soon as the fertilized ovum is implanted D (D) Secretes both progesterone and estrogens.

Concerning the placenta, all the following is true except

A A) It transports glucose into the fetal blood by facilitated diffusion. B B) It transports protein molecules into the fetal blood by active transport. C C) It secretes a hormone that relaxes the pelvic joints. D (E) The maternal and fetal blood mix together in its tissue.

The ovaries:

A A) Function is only the production of mature ova. B (B) Discharge 5-10 ova during each menstrual cycle. C (C) Are essential for the cyclic uterine activity. D D) Contain ova only at the time of puberty.

About the seminal fluid, all the following is true except:

A (A) Its average volume is 3 ml each of which contains about 100,000,000 sperms B B) It comes mainly from the seminiferous tubules and epididymis. a prostatic secretion C (C) 60% of its volume is a seminal vesicle secretion and 20% is D D) It contains buffers, prostaglandins, fructose, fibrinolysin & hyaluronidase enzyme

On the 21st day of the menstrual cycle:

A A) The development of the Graafian follicle is maximal. B B) The body temperature is lower than normal C C) The thickness of the myometrium is greater than in the proliferative phase. D D) There is marked increase in the blood progesterone level.

Sign in required