44- Anti-diuretic hormone (ADH/vasopressin) ______. A) Is secreted by macula den

Question

44- Anti-diuretic hormone (ADH/vasopressin) ______.

A) Is secreted by macula densa cells.

B) Enhancers water reabsorption within the proximal tubule.

C) Stimulates the insertion of aquaporins within collecting duct epithelial cells.

D) Is primarily secreted in response to a decrease in plasma osmolality.

56- Which one of the following would increase the movement of fluid for the intestinal space into the capillaries

A) An increase in capillary hydrostatic pressure.

B) A decrease in capillary colloid osmatic pressure.

C) An increase in capillary colloid osmatic pressure.

62- Hypoventilation causes CO2 levels in the blood to increase. What effect would this have on blood pH.

A) It would increase the pH of the blood because less H+ would be present.

B) It would decrease the pH of the blood because less H+ would be present.

C) It would increase the pH of the blood because more H+ would be present.

D) It would decrease the pH of the blood because more H+ would be present.

D) Hemorrhage

Explanation / Answer

Ans.44.

The choice is (C).

Anti diuretic hormone stimulates the insertion of aquaporins within collecting duct epithelial cells.

Basal epithelial cells permeability to water is very low. Due to aquaporins insertion the permeability of these epithelial cells increases to high levels and this helps in reabsorption of water from collecting duct.

Ans.56.

The choice is (C).

An increase in capillary colloid osmotic pressure increase the movement of fluid from the intestinal space into capillaries.

An increase capillaries colloid osmotic pressure indicates higher colloidal concentrationi i.e. higher plasma protein concentration and lower water concentration. Since water concentration at intestinal space is high, the fluid moves from intestinal space to capillaries.

Ans. 62.

The choice is (D)

Hypoventilation causes CO2 levels in the blood to increase. IT WOULD DECREASE THE pH OF THE BLOOD BECAUSE MORE H+ WOULD BE PRESENT.

Increased CO2 levels in blood leads to condition called as Respiratory Acidosis. The blood pH decreases i.e. it becomes acidic because of more H+ present.

pH is measure of hydrogen ion (H+) concentration. More H+ indicates less pH and vice versa.

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.