An action potential is brought about by
a. a sudden membrane impermeability.
b. the movement of negatively charged proteins
through the neuronal membrane.
c. the movement of lipoproteins to the outer side of
the membrane.
d. a local change in membrane permeability caused
by a threshold level stimulus.
e. all of these.
Answer: d
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Refer to the accompanying figure. The structure labeled as 2 is homologous with the structure labeled as:
a. 1. b. 3. c. 4. d. 5. e. 7.
The function of the nucleus is
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Which of the following is an example of asexual reproduction in eukaryotes?
A) Prokaryotic fission in the bacterium E. coli B) Budding in the protistan Hydra C) Meiosis in plants D) The union of sperm and egg in sea urchins
Which of the following bones do not contain a sinus?
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