PSIO 202

Multiple Choice

Which of the following is the first step in the formation of thyroid hormones?

• Release of thyroid hormones into the bloodstream
• Synthesis of calcitonin in the thyroid gland
• Uptake of iodine by follicular cells

• Conversion of thyroglobulin to T3 and T4

Multiple Choice

What is the role of thyroglobulin (TGB) in thyroid hormone formation?

• It transports thyroid hormones in the blood

• It is synthesized and released into the colloid where it gets iodinated

• It converts T4 to T3

• It increases the release of TSH

Multiple Choice

Where does the oxidation of iodide occur in the formation of thyroid hormones?

• in the blood

• Inside the thyroid follicular cells

• In the colloid of the thyroid follicles

• In the liver

Multiple Choice

What happens after thyroglobulin (TGB) is iodinated in the colloid?

• it is converted into T3 and T4 by combining T1 and T2

• It is secreted directly into the bloodstream

• It undergoes transformation into calcitonin

• It is converted iodine

Multiple Choice

What is the final step in the thyroid hormone formation process?

• Secretion of T3 and T4 into the blood

• Iodine trapping by follicular cells

• Iodination of TGB tyrosines

• Uptake and digestion of TGB by follicle cells

Multiple Choice

What is the calorigenic effect of thyroid hormones?

• The calorigenic effect of thyroid hormones is the increase in metabolic rate and heat production.
• Thyroid hormones only affect muscle growth, not metabolism.
• The calorigenic effect is unrelated to metabolic processes.
• Thyroid hormones decrease metabolic rate and heat production.

Multiple Choice

What is the primary role of thyroid hormones in growth and development?

• They inhibit growth in children

• They stimulate growth in conjunction with human growth hormone (hGH) and insulin

• They regulate the release of insulin

• They directly control skeletal development

Multiple Choice

What hormone stimulates the thyroid gland to produce T3 and T4?

• Thyroid-Stimulating Hormone (TSH)

• Thyrotropin Releasing hormone

• Cortisol

• Insulin

Multiple Choice

What effect does ADH have on blood vessels?

• ADH causes blood vessels to constrict.
• ADH increases blood flow to the heart.
• ADH causes blood vessels to dilate.
• ADH has no effect on blood vessels.

Multiple Choice

What is the main function of Human Growth Hormone (hGH)

• Increase water retention in the kidneys

• Increase blood glucose level

• Stimulate milk production

• to stimulate growth and cell regeneration.

Multiple Choice

Which hormone does the liver release in response to Human Growth Hormone (hGH)?

• Cortisol
• Insulin-like Growth Factor 1 (IGF-1)
• Thyroid Hormone
• Adrenaline

Multiple Choice

What happens when a person is overhydrated, in terms of ADH secretion?

• ADH secretion decreases.
• ADH secretion increases.
• ADH secretion remains unchanged.
• ADH secretion fluctuates unpredictably.

Multiple Choice

Which of the following would decrease the release of ADH?

• dehydration

• low blood osmolarity

• increased blood osmolarity

• High blood glucose