Question
please help
A decrease in mean arterial pressure stimulates which of the following? (select all that apply) ADH release. Renin release Increased H_2O excretion Aldosterone release Increased sodium excretion Which of the following is NOT a factor that affects reabsorption in the nephron? Concentration gradients electrochemical gradient osmotic gradient permeability of the membrane to molecules All of these contribute to movement during reabsorption if the excretion rate for seven molecule is less than the filtration rate, what does that mean about relative reabsorption? t he bulk of the molecule was reabsorbed the bulk of the molecule was secreted the molecule was neither reabsorbed or escreted the bulk of the molecule was filtered In the distal convoluted tubule the reabsorption and secretion of solutes highly regulated. which one of these hormones can directly inhibit sodium reabsorption? Aldosterone Atrial natriuretic peptide (ANP) Antidiuretic Hormone (ADH) Vasopressin None of the above Which of the following a response to Angotensin lt? (select all that apply) Systemic vasodilation this Stimulation Decreased ADH release Increased Aldosterone secretion Production of a larger volume of more diluted urine
Explanation / Answer
7. b macula densa are distal tubule cells that act as chemoreceptors or osmoreceptors that respond to changes in solute concentration of filtrate in distal tubule.
8. option b,and d are correct.
9. option e is correct. All contribute to reabsorption.
10. option a is correct. If the filtration rate is high it mean the maximum amount is filteringand if maximum amount is filtering and rate of excretion is less it mean bulk of the filtered amount is reabsorbing and hence less amount is excreting out.
11.Option b is correct. Atrial natriuretic peptides (ANP) act opposite to renin angiotensin system.
12. Option b and D are correct.
