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Ch. 5 Exercise
Physiology
Question | Answer |
---|---|
Arachidonic is the raw material for the synthesis of: a. amines b. thyroid hormones c. eicosanoids d. steroids e. peptides | |
Epinephrine is a(n): a. amino acid b. steroid c. eicosanoid d. adrenocorticoid e. catecholamine | |
Most chemical messengers fall into which of the following classes? a. amines b. amino acids c. peptide/proteins d. eicosanoids e. steroids | |
All amino acid chemical messengers function as: a. paracrines b. autocrines c. neurohormones d. neurotransmitters e. hormones | |
All steroid acid chemical messengers function as: a. paracrines b. autocrines c. neurohormones d. neurotransmitters e. hormones | |
Which of the following messenger classes bind to intracellular receptors? a. catecholamines only b. peptides only c. steroids only d. both catecholamines and steroids e. both peptides and steroids | |
The response of a target cell to a messenger depends on which of the following? a. concentration of messenger b. concentration of receptors on target cell c. affinity of the receptor for the messenger d. both a and c are true e. all of the above are | |
What enzyme catalyzes the synthesis of diacylglycerol? a. adenylate cyclase b. tyrosine kinase c. phosholipase C d. protein kinase e. phosphoprotein phosphatase | |
Cells that secrete a messenger are called _____________. | |
A (paracrine/autocrine) agent acts on the same cell that secretes it. | |
Endocrine glands release (neurotransmitter/hormones) into the _____________, where it travels to the target cell. | |
An active G protein releases the _________ subunit, which interacts with another membrane protein, altering it's activity. | |
The enzyme that catalyzes conversion of ATP to cAMP is called ____________. | |
Following activation of the phospatidylinositol system, (IP3/DAG) liberates calcium from intracellular stores. | |
(Lipophilic/Lipophobic) messengers exert their effect on target cells by activating or inactivating specific genes. | |
Examples of locally acting chemical messengers are (steroids/eicosanoids). | |
Cytosolic calcium often exerts its effects by binding to cytosolic (protein kinase C/calmodulin). | |
Lipophobic messengers are secreted by (exocytosis.diffusion across the cell membrane). | |
Amino acids are (hormones/neurotransmitters). | |
The (nervous system/endocrine system) is more rapid means of communication. |