Multiple Choice
How do aquatic birds such as the wandering albatross avoid becoming dehydrated even though they live in an environment that is almost entirely salt water?
42. Osmoregulation and Excretion
Osmoregulation and Excretion
Multiple Choice
Secretion of ADH (antidiuretic hormone) from the __________ occurs in response to __________ and causes __________.
A
thyroid gland; low blood sugar; kidney blood vessels to constrict
B
pituitary gland; low blood osmolarity; decreased permeability to water of a kidney's collecting duct
C
adrenal gland; high blood osmolarity; increased permeability to water of a collecting duct
D
adrenal gland; low blood pressure; increased water and solute reabsorption at the proximal tubule of the kidney
E
pituitary gland; high blood osmolarity; increased permeability to water of a collecting duct
Verified step by step guidance1
Identify the role of ADH (antidiuretic hormone) in the body. ADH is responsible for regulating water balance by affecting the kidneys.
Understand where ADH is secreted from. ADH is produced by the hypothalamus and stored and released by the posterior pituitary gland.
Recognize the stimulus for ADH secretion. ADH is released in response to high blood osmolarity, which indicates a high concentration of solutes in the blood.
Determine the effect of ADH on the kidneys. ADH increases the permeability of the collecting ducts in the kidneys to water, allowing more water to be reabsorbed into the bloodstream.
Match the correct option with the known facts: pituitary gland; high blood osmolarity; increased permeability to water of a collecting duct.
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