Most postganglionic fibers of the sympathetic nervous system secrete the neurotransmitter ________.
What will be an ideal response?
norepinephrine
NE
noradrenaline
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The primary dorsiflexor of the foot at the ankle is the
A. extensor digitorum longus. B. fibularis brevis. C. tibialis anterior. D. extensor hallucis longus. E. gracilis.
Which of the following is not characteristic of smooth muscle?
A) The striations are due to the orderly arrangement of actin and myosin. B) Neurons that innervate smooth muscles are under involuntary control. C) Smooth muscle cells are uninucleate. D) Smooth muscles do not contain sarcomeres. E) The thin filaments of smooth muscle fibers are attached to dense bodies.
Which structures in the figure together secrete liquid components of semen?
a) B, C, G b) B, C, F c) B, D, I d) B, C, L e) B, H, L
Identify the material that would NOT be considered an important inorganic substances in our bodies.
A. Iron B. Oxygen C. Glucose D. Calcium