What are the two classes of homeostatic control systems?
a. conscious and unconscious
b. intrinsic and extrinsic
c. intrinsic and internal
d. extrinsic and external
e. automated and reflex
b
Anatomy & Physiology
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Helper T cells are important only for cell-mediated immune responses.
Answer the following statement true (T) or false (F)
Anatomy & Physiology
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.
Anatomy & Physiology
The _________________________ is listening to the heart and lungs
Fill in the blank(s) with correct word
Anatomy & Physiology
Rods produce vision in shades of gray
Indicate whether the statement is true or false
Anatomy & Physiology