Weak acids and bases make good ________.
Fill in the blank(s) with the appropriate word(s).
buffers
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What is the function of sweat?
A. Waterproof the ear B. Moisturize the skin C. Cool the body D. Nourish an infant
The major regulatory center of the autonomic nervous system is believed to be the ________ since this brain region has functions that require appropriate activation of sympathetic and parasympathetic nerve fibers.
A. midbrain B. cerebrum C. hypothalamus D. thalamus
The prolonged electrical depolarization of cardiac muscle cells that occurs during contraction is due primarily to the persistent influx of what ion?
A. sodium B. calcium C. nitrate D. chloride E. potassium
Which of the following would be recruited later in muscle stimulation when contractile strength increases?
A) large motor units with small, highly excitable neurons B) motor units with the longest muscle fibers C) many small motor units with the ability to stimulate other motor units D) motor units with larger, less excitable neurons