The AV node is important because it
A) delays the transmission of the electrical impulses to the ventricles in order for the atria to finish contracting.
B) directs electrical impulses from the ventricles to the atria.
C) serves as the pacemaker in a normal heart.
D) electrically opens the AV valves.
E) None of these answers are correct.
A) delays the transmission of the electrical impulses to the ventricles in order for the atria to finish contracting.
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The lymphatic system differs from the cardiovascular system in that
A. the lymphatic system only carries fluid away from tissues. B. the lymphatic vessels have their own "pump" to assist flow. C. lymph capillaries do not contain any fluid. D. lymph capillaries allow free movement of fluid in and out of the capillaries. E. lymph circulates fluids and cardiovascular does not.
Growth of new blood vessels is called __________.
Fill in the blank(s) with the appropriate word(s).
An acute allergic response can lead to
a) transplantation b) retroviruses c) anaphylactic shock d) passive immunity e) active immunity
There are three compartments in a ruminant stomach
Indicate whether the statement is true or false