How fast would the heart beat if the AV node were diseased, as occurs in total heart block?
A. More than 90 beats per minute
B. An average of 75 beats per minute
C. 40 to 60 beats per minute
D. 20 to 40 beats per minute
E. The heart rate would be very erratic and rates would fluctuate widely.
D. 20 to 40 beats per minute
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Which of the following is not a characteristic of enzymes?
A. They speed up the rate of chemical reactions but are not used up in the process. B. They are most active at temperatures above 53 degrees C. C. Most are proteins. D. They have active sites and interact with specific substrates.
Bile is composed of HCl, pepsin, mucus, and intrinsic factor.
Answer the following statement true (T) or false (F)
The ________ is the base, or floor, of the mouth.
A. tongue B. soft palate C. labia D. hard palate
Damage to the orbitofrontal area of the prefrontal cortex causes ________.
A. inhibited fear response B. severe impulsive/sociopathic behavior C. memory deficiencies D. cognitive deficiencies