Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Behavioral Neuroscience 370 > Homework Review Test 1 > Flashcards

Homework Review Test 1 Flashcards

1
Q

___ are one of the cell types composing the nervous system

A

neurons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

___ neurons control movements and actions of organs

A

motor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The most important supporting cells of the brain are the

A

glial cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

The dendrites of a neuron…

A

transmit info to the cell body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The part of a neuron that contains the nucleus is called the

A

soma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

___ can be long enough to provide a direct connection b/t the spinal cord and the toes of a giraffe.

A

axons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In motor neurons, the axon and the dendrites branch out from the soma in many directions, giving this type of neuron the designation of a ___ neuron

A

multipolar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Many business deals involve a “middle man” who communicates b/t buyer and seller. The middle man b/t a sensory neuron and a motor neuron is a…

A

interneuron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The fact that the cell membrane is highly permeable to some substances and much less so to others is one variable underlying the cell being…

A

polarized

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

One function of the specialized protein channels in a cell membrane is to…

A

selectively allow substances to enter or leave a cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The cells that produce myelin in the CNS are called…

A

Oligodendrocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The cells that produce myelin in the PNS are called…

A

Schwann cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The gaps in the myelin sheaths on axons are known as

A

Nodes of Ranvier

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Glial cells…

A

Guide new neurons in fetal development,
Stimulate the development of synapses,
Clean up cellular debris

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

A disease that destroys myelin is…

A

Multiple sclerosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Where are vesicles stored?

A

The axon terminals

17
Q

The resting membrane potential is…

A

The difference in electrical charge inside and outside the inactive neuron.

18
Q

Sodium ions are most concentrated in the ___ fluid.

A

extracellular

19
Q

The force by which high concentrations of ions disperse away from each other and thus spread evenly through a solution is called…

A

Force of diffusion

20
Q

When depolarization of the cell membrane reaches threshold, which occurs?

A

Opening of sodium ion channels

21
Q

What ionic movement is responsible for pulling the membrane potential back to a negative voltage during an action potential?

A

Potassium ions move out of the cell.

22
Q

The action potential spreads through an axon by…

A

Depolarizing adjacent membrane to threshold, triggering another action potential.

23
Q

Absolute refractory period is when…

A

The neuron cannot fire again because the sodium channels are unable to open.

24
Q

The conduction speed of neurons is largely a function of…

A

axon diameter and myelination

25
Q

Saltatory conduction occurs only in…

A

myelinated axons

26
Q

Where can sodium ions enter a myelinated axon?

A

nodes of Ranvier

27
Q

As the action potential is conducted down the axon it…

A

Remains constant in size

28
Q

A movement of the resting membrane potential from -70 to -90 would be…

A

hyperpolarization

29
Q

The axon terminals of neurons…

A

Release neurotransmitters from vesicles

30
Q

The rate at which a neuron fires depends on the…

A

relative strength of excitatory and inhibitory inputs it receives

31
Q

Neurotransmitter action can be terminated by…

A
  • Deactivation of the transmitter by an enzyme
  • Reuptake into the axon terminal
  • Absorption of the neurotransmitter by glial cells
32
Q

Which neurotransmitter has been related to the reinforcing action of food, sex, and abused drugs?

A

Dopamine

33
Q

Which is the principal excitatory neurotransmitter in the brain?

A

Glutamate

34
Q

Which drug blocks the effects of a neurotransmitter?

A

Antagonist

Behavioral Neuroscience 370 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions