What is the stimulus for the release of insulin?
Low blood volume
Low blood levels of calcium
High blood levels of glucose
High blood levels of potassium
The Correct Answer is C
A. Low blood volume:
This stimulates ADH and aldosterone, not insulin.
B. Low blood levels of calcium:
This stimulates parathyroid hormone (PTH), not insulin.
C. High blood levels of glucose:
Insulin is secreted by the pancreas in response to elevated blood glucose to facilitate cellular uptake of glucose.
D. High blood levels of potassium:
Though insulin helps drive potassium into cells, its release is primarily stimulated by glucose.
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Related Questions
Correct Answer is D
Explanation
A. Secreted in response to elevated glucose levels: T3 and T4 regulate metabolism, not glucose.
B. Secreted in response to decreasing calcium blood levels: This describes PTH, not T3/T4.
C. Secreted by the parathyroid gland: T3 and T4 are secreted by the thyroid gland.
D. Secreted by the thyroid gland: T3 (triiodothyronine) and T4 (thyroxine) are thyroid hormones involved in metabolic regulation.
Correct Answer is A
Explanation
A. Erythropoietin:
Erythropoietin is released by the kidneys in response to hypoxia to stimulate red blood cell production.
B. Renin:
Renin is secreted in response to low blood pressure, not low oxygen levels.
C. ADH:
ADH responds to high plasma osmolality and low blood volume, not oxygen levels.
D. Aldosterone:
Aldosterone is secreted in response to low sodium or high potassium, and part of the RAAS, not oxygen deficiency.
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