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Prolactin and Posterior Pituitary Hormones

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Prolactin and Posterior Pituitary Hormones

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Questions and Answers

What are the two major hormones produced by the thyroid gland?

Thyroxine (T4) and insulin

Tri iodothyronine (T3) and parathyroid hormone

Tri iodothyronine (T3) and thyroxine (T4) (correct)

Insulin and glucagon

What is the role of TSH (thyroid stimulating hormone) in the body?

It regulates calcium levels in the blood

It facilitates glucose metabolism

It promotes muscle growth

It stimulates iodide uptake and thyroid hormone synthesis (correct)

How do T4 and T3 enter cells prior to exerting their effects?

By binding to cell surface receptors

By diffusion or active transport (correct)

Through the mitochondria

By direct entry into the nucleus

What is the enzyme responsible for converting T4 to T3?

Peroxidase (D) Signup and view all the answers

What is the primary function of T4 and T3 in the body?

Facilitation of protein synthesis (D) Signup and view all the answers

What is the main function of prolactin?

Initiates milk secretion (B) Signup and view all the answers

Which hormones act as catactagogues by increasing contraction of udder muscle?

Pilocarpine and pituitrin (D) Signup and view all the answers

How is oxytocin released into circulation?

By neural reflex during parturition (C) Signup and view all the answers

Which hormone has an anti-diuretic effect in the kidney?

Vasopressin (D) Signup and view all the answers

What is the therapeutic use of oxytocin?

Stimulating milk let down (A) Signup and view all the answers

Which hormone binds to V2 receptors in the kidney to increase water permeability?

Vasopressin (B) Signup and view all the answers