Which of the following is involved in stimulating milk letdown?

1Which of the following is involved in stimulating milk letdown?

 

Increased progesterone levels

 

Increased estrogen levels      

 

Secretion of a small amount of milk

 

Mechanical stimulation of the breasts that cause release of oxytocin

 

2Which of the following explains the neural mechanism of an erection?

 

It is a somaticreflex mediated predominantly by sympathetic nerve fibers.

 

It is anautonomic reflex mediated predominantly by sympathetic nerve fibers.

 

It is anautonomic reflex mediated predominantly by parasympathetic nerve fibers.

 

It is a somaticreflex mediated predominantly by parasympathetic nerve fibers.

 

3Arm and legs buds appear at about 28 days from

 

neural crestcells.

 

the coelom.

 

somitomeres.

 

apical ectodermalridges.

 

4Which of the following statements does not correctly contrast the female and male reproductive systems?

 

The male reproductive system produces gametes from puberty until death of the individual; the female reproductive system normally ceases gamete production during middle age.

 

The male reproductive system produces and stores gametes, whereas the female reproductive system only stores gametes.

 

The female reproductive system produces secretions to nourish the neonate; the male reproductive system does not.

 

All of the statements are correct.

 

5Which of the following is derived from endoderm?

 

Muscle

 

Epidermis of the skin

 

Brain

 

Mucosa of the digestive tract

 

6Which of the following major events of prenatal development happens first?

 

The body is covered with lanugo.

 

The central nervous system begins to form.

 

one calcification begins.

 

The eyes are fully open.        

 

See the phases below.

 

7Match A in the drop down.

 

8Match B in the drop down.

 

9Match C in the drop down.

 

10Match D in the drop down.

 

11Match E in the drop down.

 

12Which of the following is NOT an age-related change of the female reproductive system?

 

Decreased estrogen and progesterone production

 

Dryness of the vagina

 

Cessation of the menses

 

ecreased incidence of breast cancer

 

See the image below.

 

13Match A in the drop down.

 

14Match B in the drop down.

 

15Match C in the drop down.

 

16Which of the following is a contraceptive method that not only prevents fertilization but also provides protection against sexually transmitted diseases?

 

Spermicidal agents

 

Oral contraceptives

 

Diaphragm

 

Condom        

 

17Before parturition,

 

the uterus stretches, causing the release of ACTH from the adenohypophysis.

 

fetal glucocorticoids decrease the production of progesterone by the placenta.

 

there is an increase in the stimulatory effects of progesterone on the uterine muscle.

 

the placenta secretes increased amounts of oxytocin.

 

18Which of the following findings of Mendel’s work are currently accepted as a valid explanation of genetic inheritance?

 

All of the choices are correct.

 

Gene pairs separate during gamete formation.

 

Genes exist in pairs in an individual.

 

Gene pair segregation is relatively random during gamete formation.

 

19Which of the following is correctly matched?

 

Second stage of labor – ends with cervix dilation to maximum

 

Third stage of labor – placenta expelled from uterus

 

First stage of labor– Fetus exits vagina

 

20Assume a couple has just completed intercourse, and sperm cells have been deposited in the woman’s reproductive tract. Trace the pathway of the sperm cells through the female reproductive tract to the point where fertilization will most likely occur.

 

   (1) Cervix

 

 (2) Uterine tube

 

 (3) Cavity of uterus

 

 (4) Vagina

 

4, 3, 1, 2

 

4, 3, 2, 1

 

1, 2, 3, 4

 

4, 1, 3, 2

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