The nodes of Ranvier are _______.
A) locations on the axon where the myelin sheath is very heavy
B) locations on the axon where the myelin sheath is absent
C) a type of glial cell
D) trigger zones of an axon
Ans: B) locations on the axon where the myelin sheath is absent
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Which of the following would you expect to have the least effect on hematocrit percentage?
A) prolonged or excessive fever B) living at higher altitude C) dehydration D) injection with erythropoietin (EPO)
Centers controlling cardiovascular, respiratory and digestive activity via the autonomic system are located in the _______
Fill in the blank(s) with correct word
Describe the neuromuscular junction
A) The neuromuscular junction is where the dendrites of a motor neuron interact with the skeletal muscle fiber midway along the fiber's length. B) The neuromuscular junction is where the cell body of a motor neuron interact with the skeletal muscle fiber at one end. C) The neuromuscular junction is where the axon terminals of a motor neuron interact with the skeletal muscle fiber midway along the fiber's length. D) The neuromuscular junction is where the dendrites of a sensory neuron receive inputs from a skeletal muscle fiber. E) The neuromuscular junction is where the axon terminals of a sensory neuron receive inputs from a skeletal muscle fiber.
According to the Laplace's Law, as the diameter of a blood vessel increases, the force applied to the wall of that vessel
A. increases. B. decreases. C. increases, then decreases. D. remains the same. E. None of these choices is correct.