Which of the following substances is NOT secreted at any point into the renal tubules?

A) potassium
B) hydrogen
C) sodium
D) choline
E) creatinine


Ans: C) sodium

Anatomy & Physiology

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Each of the following hormones is an amino acid derivative except

A) epinephrine. B) norepinephrine. C) thyroid hormone. D) testosterone. E) melatonin.

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Parasympathetic and sympathetic influence on heart rate is controlled by reflexes.

Answer the following statement true (T) or false (F)

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The limbic system, especially the ________ and ________, are rich in "stress hormone" receptors.

A. hippocampus; amygdaloid body B. cingulated gyrus; amygdaloid body C. caudate nucleus; hippocampus D. septal nuclei; hippocampus

Anatomy & Physiology