Muscular walls of the thorax and abdomen are composed of
A) spinal erector muscles.
B) muscles of mastication.
C) oblique and rectus muscles.
D) glossal muscles.
E) pectoralis muscles.
Answer: C
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You have discovered a novel hormone. Early experiments have shown that it is quite hydrophobic. Which of the following is likely to also be TRUE of these hormones?
A. They usually have very rapid effects on target cells. B. They mostly bind to receptor proteins in the surface membrane of target cells. C. They are highly soluble in blood plasma. D. They are generally polar molecules. E. Their mechanism of action generally involves altering protein synthesis.
A high percentage of sodium and potassium ions move during each action potential
Indicate whether the statement is true or false
Digestion occurs mainly in which of the following structures?
(A) cecum and ascending colon (B) transverse colon (C) stomach and duodenum (D) jejunum and ileum (E) transverse and sigmoid colon
Choose the statement that correctly describes the structure or function of dendrites.
A. Are thin extensions of the axon B. Transmit graded electrochemical impulses toward the cell body C. Release neurotransmitters to initiate graded potentials in adjacent cells D. Transmit action potentials away from the cell body