Proteins in the cell membrane that bind hormones and relay messages into the interior of the cell __________.
A)are known as transmembrane proteins
B)provide cell identification
C)perform a function known as signal transduction
D)are known as carrier proteins
C)perform a function known as signal transduction
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Oxygen-poor blood passes through the ________.
A. right AV (tricuspid) and pulmonary valves B. left AV (mitral) valve only C. left AV (mitral) and aortic valves D. pulmonary and aortic valves E. right AV (tricuspid) valve only
A sarcomere is ________
A) the nonfunctional unit of skeletal muscle B) the contractile unit between two Z discs C) the area between two intercalated discs D) the wavy lines on the cell, as seen in a microscope E) a compartment in a myofilament
The syndrome caused by hypersecretion of the adrenal cortex, which results in excessive circulating cortisol levels, fatigue, muscular weakness, and changes in body appearance is called ________
A) Cushing's syndrome B) Addison's disease C) Hashimoto thyroiditis D) None of the above
A patient with a low RBC count receives vitamin B12 injections every 2 weeks. Why?
A. This patient is training for a triathlon. B. This patient is anemic and has low iron. C. Parietal cells in this patient's stomach have ceased producing intrinsic factor. D. This patient's parietal cells have stopped secreting HCl.