Which structure in the figure is the main duct for the return of lymph to the blood?
a) A
b) F
c) G
d) C
e) H
a
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A ball is tossed vertically upward from a height of 2 m with an initial velocity of 10 m/s. Just before the ball hits the ground, its velocity will be what?
A. 10 m/s B. less than 10 m/s C. greater than 10 m/s D. not possible to predict
Sam is an accountant who is especially busy during tax season. By the end of each day he complains of shoulder stiffness and tightness as well as some upper back pain. What might be Sam’s problem and how could he prevent the discomfort?
What will be an ideal response?
Select the correct statement about blood flow.
A) It is relatively constant through all body organs. B) It is measured in mm Hg. C) It is greatest where resistance is highest. D) Blood flow through the entire vascular system is equivalent to cardiac output.
How would the loss of acetylcholinesterase from the motor end plate affect skeletal muscle?
A) It would make the muscles less excitable. B) It would produce muscle weakness. C) It would cause spastic paralysis (muscles are contracted and unable to relax). D) It would cause flaccid paralysis (muscles are relaxed and unable to contract). E) It would have little effect on skeletal muscles.