deck 2

Question 1

Why do neurons rely so heavily on glucose as their source of nutrition?

Answer 1

other fuels do not readily cross the blood-brain barrier

Question 2

When the neuronal membrane is at rest, the sodium channels…

Answer 2

are closed

Question 3

What is one major cause for the resting potential of a neurons membrane?

Answer 3

the sodium-potassium pump

Question 4

When a membrane is at rest, what attracts potassium ions to the inside of the cell?

Answer 4

an electrical gradient

Question 5

Stimulus A depolarizes a neuron just barely above the threshold, stimulus B depolarizes a neuron to 10 mV beyond threshold. What can we expect to happen?

Answer 5

stimulus A and stimulus B will produce the same response in neurons

Question 6

Suppose we applied a drug to a neuron that caused its sodium gates to suddenly open wide. What would happen?

Answer 6

an action potential

Question 7

According to the all-or-none law…

Answer 7

once an axon reaches threshold, the amplitude and velocity of an action potential are nearly equal each time

Question 8

Where do most action potentials begin?

Answer 8

at the axon hillock

Question 9

What is the primary difference between temporal summation and spatial summation?

Answer 9

spatial summation depends on contributions from more than one sensory neuron

Question 10

In the epigenetics studies on maternal behavior, researcher Meaney showed that…

Answer 10

stress resilience was related to maternal behavior but could not be reversed with cross-fostering the pups