What removes Ca2+ from the inside of an axon terminal of a chemical synapse after an electrical
impulse has passed?
a. ion channels
b. active transport pumps
c. passive carrier proteins
d. exocytosis
e. simple diffusion through the plasma membrane
B
You might also like to view...
Chromosomal gene exchange is not useful in classification studies because prokaryotes do not reproduce sexually.
Answer the following statement true (T) or false (F)
As a stream flows down its course, it generally becomes warmer and slower
Indicate whether the statement is true or false
What is the adaptive function of specialized digestive tract chambers in vegetarian animals like cows and horses?
a. maintain low pH for stomach enzymes. b. mixing of bile and pancreatic enzymes with food. c. for storage of partially digested plant material. d. housing symbiotic bacteria required for cellulose digestion. e. consolidation of undigested waste before defecation.
The fungus Penicillium produces a compound that blocks peptidoglycan assembly. Why is a fungus trying to kill bacteria?
A. The fungal compound is produced in response to a bacterial invasion of the fungal hyphae. B. The compound produced by the fungus is used for nitrogen fixation, the antibacterial properties are accidental. C. Fungi and bacteria are both decomposers and compete for resources. D. Fungi eat bacteria.