In the membrane of a resting nerve cell, when chemically gated Cl- channels open,
A) Cl- ions leave the cell and the cell becomes depolarized.
B) Cl- ions enter the cell and the cell becomes depolarized.
C) the cell becomes depolarized.
D) Cl- ions leave the cell.
E) Cl- ions enter the cell.
E) Cl- ions enter the cell.
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The connective tissue wrapping that surrounds bundles (fascicles) of axons is the
A. epineurium. B. endoneurium. C. perineurium. D. endosteum. E. periosteum.
Which group of muscles comprises the shoulder muscles?
A) trapezius group B) deltoid group C) rhomboideus group D) pectoralis group
An element's atomic number is determined by the number of ________ in one atom of that element.
A. electrons B. atomic mass units C. nuclei D. protons E. neutrons
What organ(s) play(s) a role in the excretion of sodium?
Skin Kidneys Lungs Liver