10 CNS quiz questions

Question 1

Stimulation by the __ motor neurons can either excited or inhibit smooth muscle, cardiac muscle, and glands. Stimulation by __ motor neurons always causes contraction of skeletal muscle.

Answer 1

Autonomic; somatic

Question 2

In which space is the cerebrospinal fluid found?

Answer 2

Subarachnoid space

Question 3

Define the term spinal reflex.

Answer 3

Spinal reflexes are reflexes that involve the spinal cord only.

Question 4

The innermost layer of the meninges is the __.

Answer 4

Pia mater

Question 5

List the common networks of a spinal nerve.

Answer 5

Cervical plexus
Brachial plexus
Lumbar plexus
Sacral plexus

Question 6

List the 5 functional components of a reflex arc:

Answer 6

Receptor
Sensory neuron
Integrating centre
Motor neuron
Effector

Question 7

What are the 2 main functions of the spinal cord in the maintenance of homeostasis?

Answer 7

Nerve impulse propagation

Information integration

Question 8

What nerves are in the cervical enlargement?

Answer 8

Its an expansion of the spinal cord in the cervical region; it contains nerves that supply the upper limbs.

Question 9

What is meant by the expression blood-brain barrier?

Answer 9

Refers to the highly selective nature of the capillaries in most parts of the brain. Many substances that could leak out of capillaries in other parts of the body are prevented from doing so in the brain.

Question 10

List 3 ways that the hypothalamus functions to maintain homeostasis:

Answer 10

Controlling the ANS
Controling the pituitary gland
Regulating emotion
Regulating eating and drinking
Controlling circadian rhythms

Question 11

A somatic reflex involves __ muscle.

Answer 11

Skeletal

Question 12

What is the cerebral cortex composed of?

Answer 12

It is made up of gray matter

Question 13

Define the term plexus.

Answer 13

A plexus is a network of spinal nerve branches just outside of the spinal cord.

Question 14

In a cross section of the spinal cord, what are the horns?

Answer 14

Horns are cross sections of columns of nerves cell bodies and nonmyelinated fibres.

Question 15

Lost in order from outside, the coverings if the spinal cord and name the spaces adjacent to them.

Answer 15

Dura: outer is epidural space, inner is subdural.
Arachnoid: inside is the subarachnoid space.
Pia: inner layer of the membranes surrounding the brain and spinal cord.

Question 16

Describe the function of Broca’s area.

Answer 16

Functions to translate thoughts into speech by coordinating the muscles of speech and breathing to enable one to speak.

Question 17

Name the nuclei located in the medulla that control autonomic function.

Answer 17

Cardiovascular centre.

Medullary rhtymicity centre.

Question 18

Describe the location of the midbrain.

Answer 18

The midbrain lies above the pons and below the diencephalon.

Question 19

What are the functions of the cerebrospinal fluid?

Answer 19

Protection
Mechanical and chemical
Supply of nutrients
Removal of wastes

Question 20

Name the 3 major parts of the diencephalon:

Answer 20

Thalamus
Hypothalamus
Pineal gland

Question 21

Name the 3 regions of the brain stem:

Answer 21

Medulla oblongata
Pons
Midbrain

Question 22

What is a mixed nerve?

Answer 22

A mixed nerve contains both sensory and motor fibres.

Question 23

What important nuclei, in addition to those of the cranial nerves, are found in the pons?

Answer 23

Help regulate breathing

Question 24

What is the function of the limbic system?

Answer 24

Functions in emotional aspects of behaviour related to survival.

Question 25

Where is cerebrospinal fluid produced?

Answer 25

In a network of capillaries called the choroid plexus, which is found in the brain ventricles.

Question 26

The superficial gray matter later of the cerebrum is called the:

Answer 26

Cerebral cortex

Question 27

What is the name of the location in the brain where CAF is reabsorbed into the bloodstream?

Answer 27

Arachnoid villi

Question 28

At its superior end, the central canals of the spinal cord is continuous with what structure in the brain?

Answer 28

Fourth ventricle

Question 29

How many pairs of spinal nerves emerge from the spinal cord?

Answer 29

31

Question 30

Name 3 important sensory areas of the cerebral cortex.

Answer 30

Somatosensory area
Visual area
Auditory area
Gustatory area
Olfactory area