A bond created from the sharing of electrons between two atoms is a(n) ________ bond.
A. ionic
B. covalent
C. hydrogen
D. metallic
Answer: B
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Which incorrectly describes what happens during skeletal muscle contraction?
A. The width of the A band remains constant. B. The I bands narrow. C. The H zone disappears. D. The Z discs of a sarcomere move farther apart. E. The sarcomere narrows.
A bacterial toxin is known to block the release of ACh at the motor end plate of skeletal muscle. Consequently,
a. the skeletal muscle contracts with increasing force. b. the skeletal muscle contracts with increasing frequency. c. the ability to stimulate the muscle is impaired. d. other neurotransmitters would stimulate the muscle.
Feces consist of
A. water. B. undigestible food. C. bacteria. D. sloughed-off epithelial cells. E. All of these are found in feces.
Cells undergo division when which of the following conditions have been met?
A) They are still growing and have ample nutrients B) They are stimulated by growth factors and neighboring cells are squeezed tightly against them C) They have grown large enough and replicated their DNA D) They have grown large enough and neighboring cells are squeezed tightly against them