Sweat glands and arrector pili muscles are controlled
A. only by the parasympathetic nervous system.
B. only by the sympathetic nervous system.
C. by both the sympathetic and parasympathetic nervous systems.
D. by both the autonomic and somatic nervous systems.
B
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What will be an ideal response?
The repeating contractile unit of a skeletal muscle fiber is the
A) sarcolemma. B) sarcomere. C) sarcoplasmic reticulum. D) myofibril. E) myofilament.
Changing the shape of the lens for near and far vision is called
A. refraction. B. convergence. C. transmutation. D. accommodation.
In the lever where the biceps brachii flexes the elbow, what is the effort?
A. The insertion of the muscle on the radius B. The elbow joint C. The radius D. The hand