The process by which cells specialize is called differentiation.
Answer the following statement true (T) or false (F)
True
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When water mixtures are formed, the components are chemically altered and the new molecular bonds can be separated only by chemical means
Indicate whether this statement is true or false.
Which statement is true?
a. the autonomic nervous system has no effect on the heart b. the AV node can generate electrical impulses just as quickly as the SA node c. If the pacemaker of the heart fails, then heart will stop beating d. if the pacemaker of the heart stops, the AV node will take over
You observe a small, nonpolar molecule near a membrane. How would this molecule likely transport across the membrane?
A)transport across the membrane? B)active transport C)channel-mediated facilitated diffusion D)carrier-mediated facilitated diffusion E)simple diffusion
Which of the following is NOT an age-related change in skeletal muscle?
A. Loss of synapse surface area B. Decreased recovery time C. Decrease in motor units D. Loss of fast-twitch fibers E. Loss of muscle strength