How many nucleotides are needed to form a codon?
A. 20
B. 3
C. 2
D. None of the choices are correct.
Answer: B
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The sympathetic division of the ANS has
A. norepinephrine as a transmitter substance. B. short preganglionic axons. C. long postganglionic axons. D. preganglionic neuron cell bodies in the T1?L2 regions of the spinal cord. E. All of the choices are correct.
What is the function of the mineralocorticoids secreted by the adrenal gland?
A. Regulate glucose levels in the blood B. Act as secondary sex hormones C. Stimulate metabolism of lipids D. Regulate electrolyte concentration in body fluids E. Stimulate metabolism of proteins
Which valves have chordae tendineae?
A) coronary valves B) aortic and pulmonary valves C) semilunar valves D) valves in veins E) bicuspid (mitral) and tricuspid valves
Creatine phosphate
A) Is produced by the process of anaerobic respiration. B) Can replace ATP in binding to myosin molecules during contraction. C) Acts as an energy reserve in muscle tissue. D) Is only formed during strenuous exercise. E) Cannot transfer its phosphate group to ADP.