Name and describe the shallow depressions and grooves found on the heart's external surface
What will be an ideal response?
The anterior interventricular sulcus marks the boundary between the left and right ventricles on the heart's anterior surface; the shallower posterior interventricular sulcus marks the boundary between the left and right ventricles on the posterior surface; and the coronary sulcus is a deep groove that marks the border between the atria and the ventricles.
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Consider the difference between lifting a light pad of paper versus a heavy textbook. The primary way the level of force of muscle contraction is controlled is by
A. recruiting a different number of motor units. B. activating different regions of the muscle. C. activating the motor units at a different frequency. D. altering the number of crossbridges each individual fiber uses.
How are the sympathetic and parasympathetic divisions anatomically different?
What will be an ideal response?
Which of the following is NOT true of merocrine sweat glands?
A. They cool the body through evaporation in response to stress and exercise. B. They excrete water, salt, and nitrogen wastes from the body. C. They are also called eccrine sweat glands. D. Their ducts open into hair follicles. E. All of these are true of merocrine sweat glands.
Which of the following cells produces antibodies?
A. Monocyte B. Neutrophil C. Basophil D. Plasma cell