Reference no: EM133453723

Questions

1. Which of the following is NOT a potential way to bypass the blood-brain barrier?

by injecting the molecule directly into the bloodstream.

with small molecules

by being one of a number of molecules critical for normal cellular function

by appearing to be one of the molecules that are critical for normal cellular function.

all of these are ways to cross the blood brain barrier

2. A change in the axon membrane potential from -70 mV to -72 mV would be termed a(n)

hyperpolarization

depolarization

threshold potential

action potential

excitatory local potential

3. Which of the following is NOT a function of the glial cells?

The initiation of action potentials.

Providing blood to neurons.

Removal of debris from the brain.

Physical support of neurons.

Insulation of nerve cells from each other.

4. We have more neurons in our nervous system than glial cells.

True

False

5. If a neuron is inhibited, we can also say that it is

hyperpolarized

depolarized

polarized

damaged

excited

6. The ion channels connected to post synaptic receptors are voltage gated.

True

False

7. If a neuron dies and there is debris to be cleaned up, what will likely happen?

astrocytes go to the area of the damage and clean up the debris

a new neuron will be generated to take its place

the dead neuron stays where it is

the person must go into surgery to remove the dead neuron