When a membrane is at rest, what attracts sodium ions to the inside of the cell?
a. an electrical gradient
b. a concentration gradient
c. both an electrical gradient and a concentration gradient
d. neither an electrical gradient nor a concentration gradient
Question 2
One advantage of being homeothermic is that it ____.
a. reduces the fuel requirements of the body
b. prevents excessive reliance on a single sensory system
c. enables the individual to stay active when the environment is cool
d. decreases the need for shivering and sweating