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

Anatomy & Physiology

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The autonomic nervous system is part of the somatic nervous system

Indicate whether the statement is true or false

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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

Anatomy & Physiology

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

Anatomy & Physiology

TSH plays a key role in the ________ of thyroid hormones

A) inhibition B) synthesis C) release D) inhibition and secretion E) synthesis and release

Anatomy & Physiology