Ch 7 quiz questions

The pituitary hormone that triggers the release of thyroid hormone from the thyroid gland is

TSH

The link between a first messenger and a second messenger in a cell that responds to peptide hormones is usually

a G protein

steroid hormones

bind to receptors in the nucleus of their target cells

Which of the following substances activates protein kinases and thus acts as a second messenger?

cyclic AMP

The primary function o ADH is to

decrease the amount of water lost at the kidneys

The primary function of ADH is to

decrease the amount of water lost at the kidneys

Hormones known as "catecholamines" are

derivatives of the amino acid tyrosine

After a steroid hormone binds to its receptor to form an active complex,

gene transcription is initiated

after a steroid hormone bind to it receptor to form an active complex

gene transcription is initiated

All target cells

have hormone receptors

The pituitary hormone that controls the release of glucocorticoids from the suprarenal cortex is

ACTH

When adenyl cyclase is activated,

ATP is consumed and cAMP is formed

An activated G protein can trigger

All of the answers are correct (the activation of adenyl Cyclase, the opening of calcium ion channels in the membrane, the release of calcium ions from intercellular stores, a fall in cAMP levels)

A kinase is an enzyme that performs

phosphorylation

The pituitary hormone that stimulates milk production by the mammary glands is

prolactin

The hormone oxytocin

promotes uterine contractions is responsible for mil expression from the mammary glands triggers prostate gland contraction is produced in the hypothalamus

When a catecholamine or peptide hormone binds to receptors on the surface of a cell, the

second messenger appears in the cytoplasm

the hypothalamus controls secretion in the adenohypophysis by

secretin releasing and inhibiting factors into a tiny portal system