Quiz Questions: Bio Psych

Question 1

2.5 / 2.5 pts

_____ means having two identical alleles for the same trait.

Heterozygous

Omnizygous

Mutated

Correct!

Homozygous

Question 2

2.5 / 2.5 pts

When observing a sagittal brain section at the midline, what is the prominent feature composed of white matter?

Correct!

corpus callosum

cingulate cortex

ventricles

hippocampus

Question 3

2.5 / 2.5 pts

The thalamus and hypothalamus are considered part of the:

Correct!

diencephalon.

telencephalon.

metencephalon.

myelencephalon.

Question 4

2.5 / 2.5 pts

The frontal lobe is responsible for controlling:

sensory processing and directing movements toward objects.

Correct!

decision making.

vision.

hearing, language, and music.

Question 5

0 / 2.5 pts

The synapse between two neurons is surrounded by many structures, such as a(n) _____, which contributes to chemical neurotransmission by supplying the building blocks for neurotransmitters, confining the movement of the neurotransmitters to the synapse, and cleaning up excess neurotransmitters.

presynaptic membrane

storage granule

You Answered

synaptic cleft

Correct Answer

astrocyte

Question 6

2.5 / 2.5 pts

The _____ help(s) regulate the concentration of different ions inside and outside the neuron.

Correct!

cell membrane

lysosomes

nuclear membrane

microfilaments

Question 7

2.5 / 2.5 pts

Interneurons:

are responsible for producing myelin sheets.

Correct!

are involved in processing sensory information and sending information to the motor neurons.

produce glial cells in the midbrain.

are involved in processing motor feedback.

Question 8

2.5 / 2.5 pts

Protein molecules can:

Correct!

All of the answers are correct.

act as a gate.

act as a pump.

change shape.

Question 9

2.5 / 2.5 pts

The negative charge inside the cell membrane is largely a product of the presence of negatively charged:

potassium ions.

All of the answers are correct.

Correct!

protein anions.

sodium ions.

Question 10

2.5 / 2.5 pts

When the neuron is at rest, _____ channels are normally closed, whereas _____ is free to enter and leave the cell.

Correct!

Na⁺; K⁺

Cl^–; Na⁺

K⁺; Cl^–

K⁺; Na⁺

Question 11

2.5 / 2.5 pts

The difference in charge between two regions is referred to as:

a concentration gradient.

diffusion.

Correct!

a voltage gradient.

current flow.

Question 12

2.5 / 2.5 pts

Which of the following is NOT one of the important reasons for refractory periods in neurons?

They limit the firing rate of the neuron.

They force nerve impulses to travel in one direction.

Correct!

They increase the sensitivity of the neuron.

They allow time for the neuron to reset prior to another action potential.

Question 13

2.5 / 2.5 pts

A brief hyperpolarization of the neuronal membrane that makes it less likely that the neuron will fire an action potential is called:

saltatory conduction.

spatial summation.

an excitatory postsynaptic potential (EPSP).

Correct!

an inhibitory postsynaptic potential (IPSP).

Question 14

2.5 / 2.5 pts

Some membrane channels can selectively allow in one type of ion (e.g., K+) but not others. The ability to restrict passage to only certain ions largely depends on:

the pigmentation of the channel.

what type of neuron the channel is on.

Correct!

the size and shape of the channel.

where on the membrane the channel is.

Question 15

2.5 / 2.5 pts

A synaptic vesicle contains:

DNA.

structural proteins.

Correct!

neurotransmitters.

neurotransmitters, structural proteins, and DNA.