Nervous System

Question 1

Main functions

Answer 1

Response to emergency (Sympathetic nervous system increases heart rate and adrenaline production)

Senses (sight, touch, hearing, taste, smell)

Question 2

Two main parts and there roles

Answer 2

Central nervous system (CNS). The brain and spinal cord processes sensory information I.e smell, touch, hearing, sight & taste

Peripheral nervous system (PNS) connect CNS to organs, limbs & skin

Question 3

Two main parts to PNS and their roles

Answer 3

Somatic system (sends information from senses to brain allowing voluntary reactions).
Contains two major neurone types:
1.Motor neurone
2.Sensory neurone

Automatic system (control involuntary functions I.e breathing, blood flow, digesting).
Further divides into sympathetic and parasympathetic systems

Question 4

Motor neurones

Answer 4

Carry information from spinal cord & brain to muscle fibres allowing physical control

Question 5

Sensory neurones

Answer 5

Carry info from nerves to CNS. Then sensory info taken to the brain (smell, touch, hearing, taste, sight)

Question 6

Sympathetic system

Answer 6

Activate for emergency/environmental threat to mobilise flight/fight/freeze response (accelerate heart rate, increase breath rate, boost blood flow to muscles, sweat, pupil dilating)

I’m response to exercise it enhances cardiorespiratory function and respiratory airways dilate

Question 7

Autonomic system

Answer 7

Part of PNS controls involuntary responses (breathing, blood circulation)

Question 8

Parasympathetic nervous system

Answer 8

Responsible for the “rest and digest” activities ie. sex, salivation, tears, urination, digestion, deflection

Question 9

Nerve tissue

Answer 9

Neurons (nerve cells communicate with body)
1.Afferent = transmit sensory signals to CNS
2. Efferent = transmit signals from CNS to body
3. Interneurons = integrate signals from afferent to efferent

Neuroglia (helper of neurons, protect/feed/insulate neurons)