What happens first following a neuronal stimulation?

a. Sodium ions enter the cell.
b. Sodium ions leave the cell.
c. Potassium ions enter the cell.
d. Potassium ions leave the cell.
e. Potassium ions are involved in positive feedback.


ANSWER: a

Biology & Microbiology

You might also like to view...

__________ pathogens obtain resources from living cells, whereas __________ pathogens kill cells before colonizing them

A. Biotrophic; necrotrophic B. Necrotrophic; biotrophic C. All bacterial; all fungi D. All fungi; all bacterial E. Asymptomatic; symptomatic

Biology & Microbiology

Bacteriophages are viruses that ____

a. catalyze bacterial reproduction b. attach to bacterial cells and extract bacterial DNA c. interfere with DNA replication in the cytoplasm of cells d. produce histones e. infect and copy themselves inside bacterial cells

Biology & Microbiology

What is the defining characteristic of the hornworts?

a. large and flat gametophyte b. large and cone-shaped spores c. narrow pipe-like sporophyte d. thin tubular rhizoids

Biology & Microbiology

large granular leukocyte comprises ___% of circulating leukocytes

What will be an ideal response?

Biology & Microbiology