JGA is a special sensitive region formed by cellular modifications in the:
1. | DCT and the afferent arteriole at the location of their contact |
2. | DCT and the efferent arteriole at the location of their contact |
3. | PCT and the afferent arteriole at the location of their contact |
4. | PCT and the efferent arteriole at the location of their contact |
An excessive loss of body fluid can:
1. | activate osmoreceptors, stimulating hypothalamus to release ADH and thereby preventing diuresis |
2. | switch off osmoreceptors, suppressing release of ADH promoting diuresis |
3. | activate osmoreceptors, stimulating hypothalamus to release ADH and thereby promoting diuresis |
4. | switch off osmoreceptors, suppressing release of ADH preventing diuresis |
Identify the incorrect statement regarding antidiuretic hormone (ADH):
1. | It is synthesized by the neurons of the hypothalamus and stored and released from the neurohypophysis. |
2. | It binds to receptors on the collecting duct cells and activates a cAMP second messenger system. |
3. | It is released during body dehydration conditions and acts on the collecting duct. |
4. | ADH is released when osmoreceptors in the hypothalamus sense a decrease in the blood osmolality. |
Identify the correct statement regarding human kidney function if ADH is not secreted in the body:
1. | Urine will be isoosmotic with plasma. |
2. | PCT will not be able to reabsorb water and sodium. |
3. | The collecting ducts have very low permeability to water. |
4. | The distal tubules secrete water. |
The collecting ducts become permeable to water and urea due to:
1. Aldosterone | 2. Atrial natriuretic peptide |
3. Renin | 4. ADH (vasopressin) |
I: | facilitates water reabsorption from latter parts of the tubule, thereby preventing diuresis. |
II: | is a potent vasodilator. |
Assertion (A): | ADH prevents diuresis. |
Reason (R): | ADH facilitates water reabsorption from the latter parts of the tubule. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True and (R) correctly explains (A). |
3. | (A) is False but (R) is True. |
4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Which area actually secretes renin into the blood?
1. macula densa | 2. juxtaglomerular apparatus |
3. juxtaglomerular cells | 4. cortical nephron |
Statement I: | An increase in blood flow to the atria of the heart can cause the release of Atrial Natriuretic Factor (ANF). |
Statement II: | A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is correct |
A hormone formed in the blood that causes vasoconstriction is:
1. Renin | 2. Aldosterone |
3. Angiotensin | 4. Vasopressin |