Because it forms covering and lining layers for body structures, ______ tissue has very little extracellular matrix
A.
epithelial
B.
connective
C.
muscle
A
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Acetylcholine
a. opens voltage-gated Na+ channels in skeletal muscle fibers, which causes depolarization of the muscle fibers b. may decrease the permeability of the motor end plate to Na+ and K+ when combined with the receptor sites on the motor end plate c. always depolarizes skeletal muscle fibers and postganglionic neurons d. does both a and b e. does both b and c
The ________ is the maximum volume of air that can be forcefully exhaled after a maximum forceful inspiration.
A. expiratory reserve volume B. vital capacity C. total lung capacity D. residual volume
Myasthenia Gravis is a disease characterized by the production of antibodies against nicotinic acetylcholine receptors, resulting in a decreased number of functioning receptors at motor end plates. Which kind of drug would most likely help with the symptoms of Myasthenia Gravis?
A. An acetylcholinesterase inhibitor B. A muscarinic antagonist C. A monoamine oxidase inhibitor D. A GABA-ergic antagonist
Predict the change in peripheral resistance as blood vessel diameter increases.
A. Peripheral resistance decreases. B. Peripheral resistance increases. C. Peripheral resistance remains unchanged. D. Peripheral resistance is constant in humans.