If the connection between the SA node and AV node becomes blocked,
A) the ventricles will beat faster.
B) the ventricles will beat more slowly.
C) the ventricular beat will remain unchanged.
D) cardiac output will increase.
E) the atria will contract more forcefully.
B
You might also like to view...
During the preparatory phase for an underhand softball pitch, the hand holding the ball is drawn behind the body prior to the forward swing of the arm. When the hand is drawn behind the body, which of the following movements occurs at the shoulder?
A. flexion B. extension C. hyperextension D. circumduction
The “pacemaker” for the heart is usually the:
a. sinoatrial node b. Purkinje fibers c. bundle of His d. atrioventricular bundle
A virus is injected into a rabbit and the rabbit is allowed to make antibodies against the viral antigen. These antibodies are then removed from the rabbit plasma and injected into a human to combat an infection by the same virus. This would be an example of
A) innate immunity. B) artificially induced passive immunity. C) artificially induced active immunity. D) naturally acquired passive immunity. E) naturally acquired active immunity.
Which are considered specific characteristics of all muscle cells?a: Contractilityb: Extensibilityc: Excitabilityd: Elasticitye: Conductivity
A. a, b, d, e B. a, b, c, d C. a, c, d, e D. a, b, c, d, e E. b, c, d