AP Quiz

axon at rest?

Sodium and potassium

Glucagon and insulin

Low glucose level causes the release of glucagon which stimulates the release of glucose from tissues.

TSH thyroxin loop?

The feedback mechanism would maintain relatively constant levels of thyroxin throughout targets.

Cortisol is a hormone produced in response to stress, including starvation, in humans. Which of the following is most likely an immediate effect of a starvation induced increase in cortisol secretion?

Increased mobilization of fatty acids from fat cells.

Which of the following best describes how myelination effects the transmission of nerve impulses?

It speeds up the transmission of impulses by acting as an electrical insulator.

Which shows the movements of calcium, potassium and sodium in the synaptic cleft?

Sodium goes in potassium goes out, calcium goes in.

Which of the following plots most accurately represents the changes in membrane potential throughout a single action potential?

Spike goes up, curves on both sides.

which of the following best represents hormone activated gene expression?

The one with steroid hormone

transmission of information from sensory neurons to interneurons

release of chemical messengers into the space between the axon