Nervous System

Question 1

What is the ‘nervous system?’

Answer 1

Sends and receives messages
Controls movement, thinking, organs

Question 2

What is CNS?

Answer 2

Central Nervous System
Brain and spinal cords
Sensory info up spinal cord via sensory neurons
Motor messages to peripheral nervous system

Question 3

What is PNS?

Answer 3

Peripheral Nervous System
Connects CNS
Made up of nerves inside brain and spinal cord

Question 4

What is afferent and efferent?

Answer 4

Afferent is sensory = carries info to CNS
Efferent is motor = carries commands away from CNS to muscles and glands

Question 5

What is ANS?

Answer 5

Autonomic Nervous System
Controls involuntary functions
E.g. heartbeat, digestion, breathing
Carries motor messages from brain to internal glands
Carries info of gland and organs to CNS via sensory neurons

Question 6

What is SNS?

Answer 6

Somatic Nervous System
Carries sensory info received by receptor cells to CNS via sensory neurons
Carries motor messages away from CNS to skeletal muscles via motor neurons

Question 7

What is Sympathetic Nervous System?

Answer 7

Fight or flight response activate during stress, danger or excitement

Question 8

What does Sympathetic Nervous System change?

Answer 8

Increases heart rate and blood pressure
Dilates pupils
Relaxes airways
Releases adrenaline
Slows digestion

Question 9

What is the Parasympathetic Nervous System?

Answer 9

Rest and digest response activated during relaxation, after eating or during rest

Question 10

What does the Parasympathetic Nervous System change?

Answer 10

Decreases heart rate and blood pressure
Constricts pupils
Stimulates digestion process/ absorbs nutrients
Promotes relaxation and recovery
Controls energy storage and regular bodily functions