A nerve impulse moves along a neuron as:
a. sodium moves into the cell and potassium moves out of the cell.
b. sodium binds to potassium.
c. sodium and potassium are pulled apart.
d. acetylcholine moves along the nerve fiber.
e. calcium exits the dendrites.
A
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A single experiment or observation can ____________ a hypothesis
A. reject B. support C. prove D. reject or support E. reject or prove
When photosynthesis is fully operational under conditions of intense light, the pH of the thylakoid lumen may be as much as three full pH units lower than the stroma of the chloroplast
That means that there are __________________ hydrogen ions in the thylakoid compared to the stroma. A. 1,000 times more B. 100 times more C. 3 times more D. 3 times fewer
The similarity in the evolutionary origins of mitochondria and chloroplasts has led to the development of the ________, which proposed that they were originally bacteria.
Fill in the blank(s) with the appropriate word(s).
Which component of a reflex arc sends messages from the central nervous system to an effector muscle?
a. motor neutron b. sensory neuron c. interneuron d. cerebral cortex e. cerebellum