Two perpendicularly oriented ________ form the centrosome, which is responsible for organizing microtubules during cell division.
Fill in the blank(s) with the appropriate word(s).
centrioles
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The salivary glands are composed of which two types of secretory cells?
A) goblet cells and squamous epithelial cells B) parietal cells and glial cells C) serous cells and mucous cells D) cuboidal epithelium and ciliated columnar cells
What is the difference between the auricles and the atria?
What will be an ideal response
During the time period immediately following an action potential, a neuron can produce another action potential only ________
A) if the neuron is stimulated again normally B) when the neuron remains very permeable to Na+ C) if the neuron receives an especially strong stimulus D) when the neuron is impermeable to K+
What action is most responsible for the resting membrane potential in cardiac muscle cells?
A. movement of K+ through voltage-gated K+ channels B. movement of Na+ through open Na+ channels C. movement of Ca2+ through voltage-gated Ca2+ channels. D. closing of Na+ and K+ voltage-gated channels