Which process employs exocytosis?
A) facilitated diffusion
B) chemical synapse
C) depolarization
D) antagonist binding
E) cross-bridge formation
Answer: B
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Norepinephrine released from the sympathetic fibers is usually
A) inhibitory. B) reverberating. C) long lasting. D) excitatory. E) None of the answers are correct.
What is the main factor that determines the power of a muscle?
A) the length B) the shape C) the number of neurons innervating it D) the total number of muscle cells available for contraction
What is the difference between cell movements in response to outside forces and cell-generated movements (in response to specific cell activity)? (Hint: Do red blood cells move because of RBC activity? What causes cell movements associated with cytokinesis?) Using the index of your text to guide you to relevant sections in other chapters (look up entries for the various cytoskeletal proteins),
explain the different types of movements that cells generate. What will be an ideal response?
Which of the following is associated with osteoclast reabsorption of bone?
A. Osteoblasts form collagen and proteoglycans. B. Blood calcium is decreased. C. Ca2+ is actively transported from blood to bone matrix. D. Hydrogen ions form an acid environment in bone matrix. E. The protein components of bone matrix are synthesized.