Module 1 HW Questions Flashcards
Which type of chemical messenger is secreted into circulating blood and acts on a tissue at another location?
endocrine hormone
What class of hormone is lipid soluble, primarily travels bound to a globular protein and binds with receptors in the target cell’s cytoplasm?
steroid
What are steroid hormones synthesized from?
cholesterol
Catecholamine hormones are synthesized from tyrosine in the medulla of the ___________ gland
adrenal
What enzyme is activated by the G protein alpha subunit in the cAMP 2nd messenger system?
adenylate cyclase
Which type of chemical messenger is secreted by a cell to act on neighboring cells?
paracrine
Which amine hormone is lipid soluble, primarily travels bound to a globular protein and binds to receptors in the target cell’s nucleus?
thyroid hormone
What are protein/polypeptide hormones synthesized from?
amino acids except tyrosine
Which type of chemical messenger is secreted by a cell to act on the same cell?
autocrine
Which type of cycle secrete a hormone every 24 hours?
circadian
Which 2nd messenger releases intracellular calcium?
IP3
What is the mechanism of action for both thyroid and steroid hormones?
stimulate transcription
Which 2nd messenger activates protein kinase in the phospholipase C 2nd messenger system?
DAG
What mechanism of action is utilized by protein/polypeptide hormones?
2nd messenger
Which feedback system responds to the biological action caused by the hormone?
positive
Which products synthesize thyroid hormones?
tyrosine and iodide
Which type of chemical messenger is secreted by neurons into circulation to act on a cell at a distant location?
neuroendocrine hormone
Which amine hormone has the same characteristics as protein hormones?
catecholamine hormones
What class of hormone is water soluble, travels free in circulation and binds with receptors on a target cell membrane?
protein/polypeptide
