Question

Normally menstruation occurs when ________.

Select one:

A. the corpus luteum secretes estrogen

B. blood levels of FSH fall off

C. blood levels of estrogen and progesterone increase

D. blood levels of estrogen and progesterone decrease

Which of the following comparisons of the central and peripheral chemoreceptors are true? Select all that apply.

Select one or more:

A. Only the peripheral chemoreceptors respond to decreases in oxygen

B. They are both equally important in responding to increases in the partia pressure of carbon dioxide

C. They both signal to the dorsal respiratory group in the medulla

D. They both inhibit the brainstem respiratory centers

When the body is in metabolic alkalosis more bicarbonate ions are secreted than reabsorbed.

Select one:

True

False

Which of the following are NOT functions of the vagina? Select all that apply.

Select one or more:

A. Receiving the male reproductive organ during sexual intercourse

B. Providing nutrients to support a developing embryo

C. Acting as a passageway for menstrual flow

D. Acting as a passageway for delivery of a baby

E. Production of an acid mantle to inhibit pathogen entry

F. Acting as a passageway for urine flow

Without tight junctions in the sustentocytes, you would expect _________.

Select one:

A. testosterone and ibhibin levels in the blood stream to decrease

B. sperm to receive insufficient nutrients to survive

C. testosterone and inhibin levels in the blood stream to increase

D. the immune system to attack and destroy developing sperm

The last step in the chemical digestion of proteins, carbohydrates, and fats occurs in the lumen of the small intestine.

Select one:

True

False

Answer 1

1.

D. blood levels of estrogen and progesterone decrease

• Progesterone play an important role in maintenance of pregnency.
• Decline of progesterone occur when fertilization not occur.

2.

A. Only the peripheral chemoreceptors respond to decreases in oxygen

C. They both signal to the dorsal respiratory group in the medulla.

• Peripheral chemoreceptors respond to PO2 only.
• Central responds to CO2 , H+.

3.

True.

• It reclaim H+ to acidify blood.

4.

B. Providing nutrients to support a developing embryo.

F. Acting as a passageway for urine flow.

5.

D. the immune system to attack and destroy developing sperm

• Without tight junction , sperm leak into blood.

6.

True.