The three major stages of spermatogenesis are ____________________, ____________________, and ____________________
Fill in the blank(s) with correct word
mitotic proliferation, meiosis, packaging
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A myogram is
A. a measurement of muscle tone. B. a recording of the events of a twitch. C. a depiction of the results of a stress test. D. a chart that shows how many muscle cells a neuron synapses with.
If a cell is at rest (-70 mV) and ligand-gated Na+ channels open, there will be a net movement of Na+ into the cell until
A) There are no more Na+ in the extracellular fluid. B) The Na+ channels close. C) The membrane potential reaches the equilibrium potential for Na+. D) Either B or C
The smallest unit of any element is a(n) ________.
A. molecule B. compound C. atom D. macromolecule E. electron
Each of the following factors affects the rate of external respiration except the
A) PO2 of the alveoli. B) PCO2 of the blood. C) thickness of the respiratory membrane. D) diameter of an alveolus. E) solubility of oxygen in plasma.