The skeleton of the heart consists of
A. fibrous connective tissue in the endocardium.
B. fibrous connective tissue encircling the atrioventricular orifices.
C. bone within the interatrial septum.
D. bone within the myocardium.
Answer: B
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Animals often show elevated rates of oxygen consumption long after the cessation of exercise, a phenomenon called __________
Fill in the blank with the correct word.
Which of the following statements concerning propagation of action potentials is incorrect?
a. saltatory conduction occurs in myelinated nerve fibers. b. during conduction by local current flow, there is a flow of current between the active and adjacent inactive area of the cell membrane, thereby decreasing the potential in the inactive area to threshold. c. the action potential jumps from one Schwann cell to the adjacent Schwann cell in a myelinated fiber. d. saltatory conduction is faster than conduction by local current flow. e. conduction by local current flow is the method of propagation in unmyelinated fibers.
The synovial membrane
A. lines the joint everywhere except over the articular cartilage. B. is a layer of tissue that is continuous with the periosteum. C. is a double layer of tissue that encloses a joint. D. is a thin lubricating film covering the surface of a joint. E. provides a smooth surface where bones meet.
Dr. McInnis measured Mike's forced vital capacity (FVC). The vital capacity includes what three lung volumes?
A. tidal volume, inspiratory reserve volume, residual volume B. tidal volume, inspiratory reserve volume, and expiratory reserve volume C. expiratory reserve volume, residual volume, and inspiratory reserve volume D. residual volume, expiratory reserve volume, and tidal volume