Water can cross cell membranes only by way of channel-mediated diffusion
Indicate whether this statement is true or false.
FALSE
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Which of the following is NOT one of the essential components of a circulatory system?
A) A pump B) A system of tubes C) A fluid D) Oxygen
Limited branching of preganglionic axons allows for
A. mass activation. B. local and discrete activation. C. rapid changes in numerous structures at once.
Which of the following is comprised of anterior rami from C5-T1?
A. Brachial plexus B. Coccygeal plexus C. Cervical plexus D. Lumbar plexus E. Sacral plexus
Which of the following statements concerning smooth muscle is true?
A. It contains many sarcomeres. B. Caveolae seem to take the place of the myofibrils. C. A calcium-calmodulin complex initiates cross-bridge formation. D. The cells are large and multinuclear. E. It has a well developed sarcoplasmic reticulum.