Physiology I Quiz

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If aldosterone secretions increase,

• blood potassium levels increase.

• acidosis results.

• blood sodium levels decrease.

• blood volume increases.

A constituent of blood plasma that forms the network of fibers in a clot is

• fibrinogen.

• platelets.

• tissue factor.

• thrombin.

Which of these changes does not decrease with aging of the endocrine system?

• thyroid hormone secretion

• parathyroid hormone secretion

• GH secretion

• melatonin secretion

When blood glucose levels increase, the secretion of which of these hormones increases?

• insulin

• GH

• cortisol

• glucagon

Glucocorticoids (cortisol)

• increase the breakdown of proteins.

• increase blood glucose levels.

• decrease inflammation.

• all of the above.

Insulin increases

• the uptake of glucose by its target tissues.

• the breakdown of protein.

• the breakdown of fats.

• glycogen breakdown in the liver

Given this list of molecule types: 1. nucleic acid derivatives 2. fatty acid derivatives 3. polypeptides 4. proteins 5. phospholipids Which could be hormone molecules?

• 1,2,3

• 2,3,4

• 1,2,3,4

• 2,3,4,5

Oxytocin is responsible for

• preventing milk release from the mammary glands

• causing contraction of the uterus.

• maintaining normal calcium levels.

• increasing metabolic rate

The release of cortisol from the adrenal cortex is regulated by other hormones. Which of these hormones is correctly matched with its origin and function?

• CRH—secreted by the hypothalamus; stimulates the adrenal cortex to secrete cortisol

• CRH—secreted by the anterior pituitary; stimulates the adrenal cortex to secrete cortisol

• ACTH—secreted by the hypothalamus; stimulates the adrenal cortex to secrete cortisol

• ACTH—secreted by the anterior pituitary; stimulates the adrenal cortex to produce cortisol