10.2 Central Nervous System

Question 1

Main components of the central nervous system?

Answer 1

The brain and the spinal cord

The central nervous system coordinates a major part of the nervous system activities.

Question 2

Large mass of nerve cell that Includes the cerebrum, cerebellum and brain stem.

Answer 2

Brain

Question 3

Structures whose role is to provide protection to the brain.

Answer 3

1. Cranium (or skull)
2. Meninges

Question 4

Membranes envelopping the brain and the spinal cord

Answer 4

Meninges

Question 5

Part of the brain and control centre of voluntary movement, sensory interpretation and intelligence. It is also the centre of emotion.

Answer 5

Cerebrum

Question 6

Part of the brain and centre of balance and movement coordination

Answer 6

Cerebellum

Question 7

Part of the brain and control centre of internal stimuli as well as of involuntary movement

Answer 7

The brain stem

Question 8

Nervous system organ that carries information from the various parts of the body to the brain. It is also the reflex centre.

Answer 8

Spinal Cord

Question 9

Rapid and involuntary reaction to a stimulus

Answer 9

Reflex

Question 10

Path taken by a nerve impulse during a reflex

Answer 10

Reflex Arc

Question 11

Name the brain main functions (5)

Answer 11

1. Analyze informaiton coming from the body
2. Make decisions
3. Think and remember
4. Keep the body alive
   5.Send out instructions to other parts of the body.

Question 12

The average adult human cerebrum weighs about ____ g.

Answer 12

1300g

Question 13

What are the two hemispheres of the cerebrum responsible for?

Answer 13

The right hemisphere controls the left side of the body and the left hemisphere controls the right side.

Each hemisphere processes information from the opposite side of the body.

Question 14

Outer layer of the cerebrum responsible for planning, reasonning and logic.

Answer 14

Cerebral cortex (grey matter)

Question 15

Part of the brain that process internal stimuli in order to control the involuntary movement of the respiratory, digestive and circulatory system.

Answer 15

Brain Stem

Question 16

Part of the brain responsible for voluntary movement (such as raising an arm)

Answer 16

Cerebrum

Question 17

Part of the brain that recognize and interpret a sound

Answer 17

Cerebrum

Question 18

Part of the brain that signals the organs and glands of the digestive system to make sure taht digestion proceeds normally.

Answer 18

Brain stem

Question 19

True or false

The cerebellum plays a role in motion sickness

Answer 19

True

Question 20

True or False: The cerebellum helps in maintaining posture.

Answer 20

True
It also allows us to walk in a straight line.

Question 21

List the functions controlled by the cerebrum.

Answer 21

• Controls voluntary movements
• Interprets sensory messages
• Controls intelligence
• Manages emotions
• Regulates physiological functions

Each function involves activity in various regions of the brain.

Question 22

What are the 31 pairs of nerves attached to the spinal cord called?

Answer 22

Spinal nerves

They transmit nerve impulses to all parts of the body.

Question 23

What is the average weight of the human brain?

Answer 23

About 1600 g

Question 24

What is the primary role of the hypothalamus?

Answer 24

Regulates major bodily functions such as hunger, thirst, and temperature

It also controls the activity of the pituitary gland.

Question 25

Fill the blanks

The _____ ___ is similar to a large communication cable in the nervous system.

Answer 25

Spinal Cord

Question 26

What effect does lead have on the nervous system?

Answer 26

It has a harmful effect, especially in young children.

Lead accumulates in the body with exposure and can cause neurological damage.