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Questions and Answers

What is the primary role of parathyroid hormone (PTH) in regulating calcium levels in the body?

PTH decreases the absorption of calcium from digested food.

PTH stimulates the release of calcium from bones into the blood. (correct)

PTH inhibits the reabsorption of calcium by the renal tubules.

PTH has no direct effect on calcium levels in the body.

What is the primary function of the thymus gland?

To secrete hormones that control growth and development.

To produce insulin for regulating blood sugar levels.

To play a major role in the development of the immune system. (correct)

To regulate the body's metabolic rate and energy expenditure.

Which of the following statements about the adrenal gland is correct?

The adrenal gland is a single gland located in the abdomen.

The adrenal gland plays no role in carbohydrate metabolism.

Underproduction of hormones by the adrenal cortex can lead to Addison's disease. (correct)

The adrenal gland is composed of a single tissue type.

What is the role of thymosins secreted by the thymus gland?

Thymosins promote the differentiation of T-lymphocytes and antibody production. Signup and view all the answers

Which of the following statements about the effect of aging on the thymus gland is correct?

The thymus gland degenerates in old individuals, leading to decreased thymosins production. Signup and view all the answers

Which hormone is primarily responsible for regulating calcium balance in the body, along with parathyroid hormone (PTH)?

Calcitonin (TCT) Signup and view all the answers

Which tissue of the adrenal gland is responsible for the production of hormones that affect carbohydrate metabolism?

Adrenal cortex Signup and view all the answers

What is the primary function of calcitonin (TCT) in regulating calcium levels in the body?

TCT inhibits the reabsorption of calcium by the renal tubules. Signup and view all the answers

Which of the following statements about the location of the adrenal glands is correct?

The adrenal glands are located at the anterior part of each kidney. Signup and view all the answers

What is the primary consequence of decreased production of thymosins in old individuals?

Weaker immune responses due to decreased T-lymphocyte differentiation. Signup and view all the answers