11 Questions
What are the two major hormones produced by the thyroid gland?
Tri iodothyronine (T3) and thyroxine (T4)
What is the role of TSH (thyroid stimulating hormone) in the body?
It stimulates iodide uptake and thyroid hormone synthesis
How do T4 and T3 enter cells prior to exerting their effects?
By diffusion or active transport
What is the enzyme responsible for converting T4 to T3?
Peroxidase
What is the primary function of T4 and T3 in the body?
Facilitation of protein synthesis
What is the main function of prolactin?
Initiates milk secretion
Which hormones act as catactagogues by increasing contraction of udder muscle?
Pilocarpine and pituitrin
How is oxytocin released into circulation?
By neural reflex during parturition
Which hormone has an anti-diuretic effect in the kidney?
Vasopressin
What is the therapeutic use of oxytocin?
Stimulating milk let down
Which hormone binds to V2 receptors in the kidney to increase water permeability?
Vasopressin
This quiz covers the actions of prolactin hormone, including mammogenic, lactogenic, and luteotropic actions, as well as its role in stimulating maternal behavior. It also touches on the hormones of the posterior pituitary, such as vasopressin and oxytocin.
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