Quiz 27 - Hormones have specific effects because only...

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Question 1 Multiple Choice 0.5 points Most of the water filtered from the glomerular capillaries into Bowman’s capsule is reabsorbed by… passive diffusion out of the ascending limb of the loop of Henle. active transport out of the descending limb of the loop of Henle. passive diffusion out of the inner part of the collecting duct. passive diffusion out of the proximal tubule. active transport out of the distal tubule. Question 2 Multiple Choice 0.5 points While feeding on a blood meal, vampire bats excrete copious amounts of dilute urine, to shed weight for the flight back to the home roost. Which one of the following is true for a vampire bat during feeding? Secretion of the enzyme renin by the juxtaglomerular apparatus is high. Plasma concentration of anti-diuretic hormone is high. The permeability of collecting ducts to water is high. None of the above statements is true. Question 3 Multiple Choice 0.5 points Which one of the following statements about hormones is false?
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Unformatted text preview: Hormones have specific effects because only specific target cells have receptors for the hormones. Polar hormone molecules pass directly through cell membranes and bind to intracellular receptors. Hypothalamic releasing hormones are conveyed to the anterior pituitary by a portal vein. Histamine is an example of a paracrine hormone, also known as a local regulator. Signal transduction pathways amplify the effects of polar hormone molecules. Question 4 Multiple Choice 0.5 points Which one of the following statements is true? Secretion of luteinizing hormone is controlled by secretion of growth hormone from the hypothalamus. Aldosterone increases the amount of Na+ reabsorbed by the distal tubule of the nephron. The main action of thyroid hormone is to regulate calcium metabolism. Insulin is secreted into the duodenum via the pancreatic duct. Oxytocin is released from the anterior pituitary....
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This note was uploaded on 10/25/2010 for the course BISC 220L taught by Professor Herrera,mcclure during the Spring '07 term at USC.

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