At what region of the neuron are action potentials first produced?
A. Cell body
B. Axon hillock
C. Dendrites
D. Initial segment of an axon
Answer: D
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The veins that merge to form the inferior vena cava are the ________ veins.
A. popliteal B. common iliac C. external iliac D. internal iliac E. posterior and anterior tibial
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Indicate whether the statement is true or false
Which of the following is not a reason for erythrocytes' flattened "doughnut" shape?
A) It allows them to fit together with leukocytes to facilitate the transport of both. B) It allows the minimum distance for diffusion of gases. C) It increases the surface area available for gas diffusion. D) It allows them to "stack" together to pass through small blood vessels more efficiently. E) It gives them flexibility so that they can pass through the circulation more easily.
What is a synergist?
A. The muscle that opposes the prime mover B. A muscle that may stabilize a joint or modify direction of movement at the joint C. The muscle that produces the most force during an action D. A muscle that prevents a bone from moving E. A molecule that provides energy for muscle contraction