The main activity that causes fluid to flow through lymphatic vessels is _____.
A) muscle contraction
B) hydrostatic pressure
C) osmotic pressure
D) blood pressure
Ans: A) muscle contraction
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Indicate whether this statement is true or false.
Which of the following describes the cells of single-unit visceral muscle?
A) They contract all at once. B) They are chemically coupled to one another by gap junctions. C) They exhibit spontaneous action potentials. D) They consist of muscle fibers that are structurally independent of each other.
Which of the following describes a central canal?
A) contains a nerve B) runs parallel to osteons C) contains a vein D) contains an artery E) All of the answers are correct.
The ________ supplies muscles and other tissues of the neck, shoulder, and upper back.
A) vertebral artery B) internal thoracic artery C) axillary artery D) brachial artery E) thyrocervical trunk