Which of the following is CORRECTLY matched with its function?
A. peripheral proteins - penetrate the lipid bilayer from one surface to the other
B. nongated ion channels - are always closed
C. receptor proteins - attach to ligand molecules
D. channel proteins - are part of an intercellular communication system
E. marker molecules - are primarily steroids
C
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TSH plays a key role in the ________ of thyroid hormones
A) inhibition B) synthesis C) release D) inhibition and secretion E) synthesis and release
The autonomic nervous system is part of the somatic nervous system
Indicate whether the statement is true or false
Identify the structures that contribute to the slow onset of contraction and prolonged contraction phase in cardiac muscle tissue.
A. Gap junctions B. Desmosomes C. Terminal cisternae D. T-tubules E. Intercalated discs
Cells of the sinoatrial node ________ during the pacemaker potential.
A. repolarize fast B. depolarize slow C. depolarize fast D. repolarize slow E. depolarize slow and repolarize fast