In the dark, the Na+ channels in the outer segments of rod cells are
A. open.
B. closed.
C. important in making the cell hyperpolarized in this resting state.
D. primarily affected by inhibitory neurotransmitter input.
Answer: A
You might also like to view...
If genetic contribution to variation in a trait is negligible:
A. identical twins will be more similar to one another than fraternal twins are to one another. B. fraternal twins will be more similar to one another than identical twins are to one another. C. identical twins will be no more similar to one another than are fraternal twins. D. identical twins will be no more similar to one another than each is to any other sibling. E. None of these choices is correct.
Once a stimulus for inflammation subsides,
___ produce compounds that suppress inflammation and promote healing.
a. neutrophils b. macrophages c. dendritic cells d. T lymphocytes e. monocytes
The low success rate and age-related diseases associated with reproductive cloning is thought to be due to
A. the age of the donor cell. B. genetic imprinting. C. large offspring syndrome (LOS). D. cell cycle problems.
Which of the following statements is true?
A) PID is a severe type of diarrhea in which infection spreads from the intestines to the bloodstream B) PID can result from Neisseria infection C) PID is more common in men than women D) Member of the family Enterobacteriaceae usually cause PID