Question

46. which of the following statement is false?

1. an increase in glomerular filtratin would cause an increase in urine production

2. the proximal convoluted tubule reabsorbs 65-70% of water and Na+ ions entering it.

3. the proximal convoluted tubule and nephron loop are subject to hormonal regulation of Na+ and water

4. Sensor cells in the macula densa are responsible for the tubuloglomerular feedback.

47. administration of drugs that selectively block the action of H+/K+ pumps in gastric cells would result in

1. inhibition of carbonic anhydrase and reductionof bicarbonate production

2. an increase in H+ secretion and a decrease in gastric pH

3. inhibition of H+ moving into the parietal cell and bicarbonate being reabsorbed into the bloodstream.

4. a decrease in H+ secretion and an increase in gastric pH

48. Make it order the following negative feedback loops contains a proper response to a drop in blood pressure.

increase renin production,  angiotension2 activation , rise in aldosterone , increased in Na+ reabsorption , in crease water reabsorption , increase in blood volume

49. which of the following statements about the nephron is True?

1. The descending limb of the nephron loop is impermeable to water

2.Na+ is actively transported from the epithelial cells into the lumen of the ascending limb of nephron loop

3. the permeability of proximal convoluted tubule to water is controlled by ADH.

4. While moving down the descending limb of nephron loop the osmolality ( solute concentration ) of tubular fluid.

50. which of the following statements about the GI tract functions are correct?

1. all statements are true

2. secretion is release of enzymes and buffers by digestive epithelium

3.ingestion is entry of solid or liquid food into oral cavity

4. peristalsis is a rhythmic, wavelike movement.

Answer 1

50. ) Answer- all statements are true

Explanation- Ingestion is the entry of solid or liquid food into oral cavity. Food must be chewed inorder to be swallowed and broken down by digestive ezymes.

Secretion is release of enzymes and they help to break down food components such as proteins, carbohydrates, and fats and rhe process is buffered by digestive epithelium.

Peristalsis is a rhythmic, wavelike movement by muscle contraction and it begins in the esophagus when a bolus of food is swallowed ,travels from the throat to the stomach.

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