3.1 Nervous System and Parts of the Brain

Question 1

Two sections making up the nervous system

Answer 1

• Central Nervous System (CNS)

* Peripheral Nervous System (PNS)

Question 2

Funtion of the nervous system

Answer 2

• Analyses sensory information
• Makes decisions regarding appropriate responses
• Makes motor responses by initiating muscular contractions and glandular secretions

Question 3

Composition of the Central Nervous System (CNS)

Answer 3

• Brain - responsible for processing information

* Spinal Cord - links the brain to the PNS

Question 4

Composition of the central core of the brain

Answer 4

• Medulla

* Cerebellum

Question 5

Function of the Medulla

Answer 5

• Breathing
• Heart rate
• Arousal
• Sleep

Question 6

Function of the cerebellum

Answer 6

• Balance
• Posture
• Movement

Question 7

Function of the cerebral cortex

Answer 7

• Centre for conscious thought
• Recieves sensory information
• Coordinates voluntary movements
• Makes decisions in light of experience

Question 8

Function of the hypothalamus

Answer 8

• Inhibits/stimulates hormone secretions
• Regulates body temperature
• Regulates water concentration in the blood

Question 9

Function of the limbic system

Answer 9

• Processes information for memories

* Influences emotional and motivational states

Question 10

Definition of corpus callosum

Answer 10

A bridge of nerve fibres

Question 11

Function of corpus callosum

Answer 11

Transfers information between the two cerebral hemispheres

Question 12

Definition of localisation of brain functions

Answer 12

Different areas of the brain are used during different parts of a task

Question 13

Sections of the Peripheral Nervous System (PNS)

Answer 13

• Autonomic Nervous System (ANS)

* Somatic Nervous System (SNS)

Question 14

How the Autonomic Nervous System works

Answer 14

Works automatically without conscious control

Question 15

Where impulses originate for the ANS

Answer 15

Medulla

Question 16

The two systems withing the ANS

Answer 16

• Sympathetic

* Parasympathetic

Question 17

How the Sympathetic and Parasympathetic systems work together

Answer 17

Antagonistically

Question 18

What the Sympathetic Nervous System prepares the body for

Answer 18

Fight or flight

Question 19

What the Parasympathetic Nervous System prepares the body for

Answer 19

Rest and digest

Question 20

The effect the Sympathetic Nervous System has on the body

Answer 20

• Increases heart rate
• Increases breathinng rate
• Decreases rate of peristalsis
• Decreases production of digestive enzymes

Question 21

The effect the Parasympathetic Nervous System has on the body

Answer 21

• Decreases heart rate
• Decreases breathinng rate
• Increases rate of peristalsis
• Increases production of digestive enzymes

Question 22

How the Somatic Nervous System works

Answer 22

• Sensory neurons carry impulses to the CNS from the senses

* Motor neurons carry impulses from the CNS to the brain

Question 23

Movements that the SNS controls

Answer 23

• Control the voluntary movement of the skeletal muscles

* Some involuntary reflex actions

Question 24

Definition of homeostasis

Answer 24

The maintenance of the body’s internal environment despite changes in the body’s external environment