Cells Of Nervous System

Question 1

What are the two main types of cells in the nervous system?

Answer 1

Neurons and glial cells.

Question 2

True or False: Neurons are responsible for transmitting electrical signals.

Answer 2

True.

Question 3

Fill in the blank: The primary function of _____ is to support and protect neurons.

Answer 3

glial cells.

Question 4

What is the basic functional unit of the nervous system?

Answer 4

Neuron.

Question 5

What are the three main parts of a neuron?

Answer 5

Dendrites, cell body (soma), and axon.

Question 6

Multiple Choice: Which type of glial cell is responsible for forming myelin in the central nervous system? A) Astrocytes B) Oligodendrocytes C) Microglia D) Ependymal cells

Answer 6

B) Oligodendrocytes.

Question 7

What is the role of astrocytes in the nervous system?

Answer 7

To provide structural support, regulate blood flow, and maintain the blood-brain barrier.

Question 8

True or False: Microglia are the immune cells of the central nervous system.

Answer 8

True.

Question 9

Fill in the blank: The _____ is the part of the neuron that conducts impulses away from the cell body.

Answer 9

axon.

Question 10

What is the function of the myelin sheath?

Answer 10

To insulate axons and increase the speed of electrical impulses.

Question 11

Multiple Choice: Which glial cell type is involved in the production of cerebrospinal fluid? A) Astrocytes B) Oligodendrocytes C) Ependymal cells D) Microglia

Answer 11

C) Ependymal cells.

Question 12

What is the term for the gaps between myelin sheaths along an axon?

Answer 12

Nodes of Ranvier.

Question 13

True or False: Neurons can regenerate after injury.

Answer 13

False (generally, neurons have limited capacity for regeneration).

Question 14

Fill in the blank: The _____ neuron carries signals towards the central nervous system.

Answer 14

sensory.

Question 15

What type of neuron carries signals away from the central nervous system?

Answer 15

Motor neuron.

Question 16

Multiple Choice: Which of the following is NOT a type of glial cell? A) Schwann cells B) Oligodendrocytes C) Neurons D) Astrocytes

Answer 16

C) Neurons.

Question 17

What are the two main divisions of the nervous system?

Answer 17

Central nervous system (CNS) and peripheral nervous system (PNS).

Question 18

True or False: Dendrites receive signals from other neurons.

Answer 18

True.

Question 19

Fill in the blank: The _____ is the part of the neuron that integrates incoming signals.

Answer 19

cell body (soma).

Question 20

What is the primary role of Schwann cells?

Answer 20

To form myelin in the peripheral nervous system.

Question 21

Multiple Choice: Which type of glial cell helps repair damaged neurons? A) Astrocytes B) Microglia C) Oligodendrocytes D) Both A and B

Answer 21

D) Both A and B.

Question 22

What is the primary function of ependymal cells?

Answer 22

To line the ventricles of the brain and produce cerebrospinal fluid.

Question 23

True or False: The blood-brain barrier prevents most substances from entering the brain.

Answer 23

True.

Question 24

Fill in the blank: _____ transmit information across synapses.

Answer 24

Neurotransmitters.

Question 25

What is the role of neurotransmitters?

Answer 25

To transmit signals between neurons at synapses.

Question 26

Multiple Choice: Which neurotransmitter is primarily involved in muscle contraction? A) Serotonin B) Dopamine C) Acetylcholine D) Norepinephrine

Answer 26

C) Acetylcholine.

Question 27

What is the function of the synaptic cleft?

Answer 27

To serve as the gap between neurons where neurotransmitters are released.

Question 28

True or False: All neurons have the same shape and size.

Answer 28

False.

Question 29

Fill in the blank: The _____ is the electrical signal that travels along the axon.

Answer 29

action potential.

Question 30

What is the resting membrane potential of a typical neuron?

Answer 30

-70 mV (millivolts).

Question 31

Multiple Choice: What ion is primarily responsible for depolarization during an action potential? A) Sodium B) Potassium C) Calcium D) Chloride

Answer 31

A) Sodium.

Question 32

What is the main role of potassium ions during repolarization?

Answer 32

To exit the neuron, restoring the negative membrane potential.

Question 33

True or False: Glial cells outnumber neurons in the nervous system.

Answer 33

True.

Question 34

Fill in the blank: The _____ nervous system controls voluntary movements.

Answer 34

somatic.

Question 35

What is the primary function of the autonomic nervous system?

Answer 35

To regulate involuntary bodily functions.

Question 36

Multiple Choice: Which part of the neuron releases neurotransmitters? A) Dendrites B) Axon terminals C) Cell body D) Myelin sheath

Answer 36

B) Axon terminals.