18. If there is an excess amount of water in the human body and the extracellular fluid becomes less concentrated: a. the thalamus increases the amount of ADH released. b. the posterior pituitary gland will decrease the amount of ADH released. c. the hypothalamus increases the amount of ADH released. d. the anterior pituitary gland will increase the amount of ADH released.
Added by Carlos P.
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This means the body needs to reduce water reabsorption in the kidneys to get rid of the excess water. Show more…
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27. When the concentration of solutes in the blood (blood osmolality) is high, the pituitary gland releases antidiuretic hormone (ADH). ADH stimulates the kidneys to reabsorb water in order to increase blood volume and decrease blood osmolality. If a person takes a long hike on a hot day without water, at the end of the day, the hiker drinks enough water to replace what was lost during the hike. Which statement explains the most likely physiological response that the hiker's body will experience after drinking the water? The pituitary gland will secrete ADH because drinking water will cause blood volume to increase, and an increased blood volume will cause the pituitary gland to release more ADH in a positive feedback loop. The pituitary gland will stop secreting ADH because drinking water will cause blood volume to increase, and an increased blood volume will cause the pituitary gland to stop releasing ADH in a negative feedback loop. The increased blood volume will prevent the release of ADH and cause the kidneys to excrete less water in a negative feedback loop. The high blood volume will increase the release of ADH and cause the kidneys to increase reabsorption of water in a positive feedback loop.
Adi S.
Which is not true of ADH? (a) released by posterior lobe of the pituitary gland (b) increases water reabsorption (c) secretion increases when osmotic pressure in body increases (d) increases urine volume (e) secretion decreases when you drink a lot of water
Jhankar T.
An individual becomes dehydrated. Osmoreceptors in the hypothalamus respond to this increase in serum osmolarity by triggering the release of antidiuretic hormone (ADH) from the posterior lobe of the pituitary gland. ADH stimulates collecting tubules in the kidneys to increase their uptake of water, decreasing serum osmolarity. 1. The variable in this mechanism is: A. Collecting tubules in the kidneys B. Antidiuretic hormone C. The hypothalamus D. Serum osmolarity QUESTION 2 An individual becomes dehydrated. Osmoreceptors in the hypothalamus respond to this increase in serum osmolarity by triggering the release of antidiuretic hormone (ADH) from the posterior lobe of the pituitary gland. ADH stimulates collecting tubules in the kidneys to increase their uptake of water, decreasing serum osmolarity. 2. The stimulus in this mechanism is: A. The increased uptake of water by the kidneys B. The release of antidiuretic hormone C. An increase in serum osmolarity D. A decrease in serum osmolarity
Kaela P.
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