Nervous system

Question 1

Nervous System

Answer 1

Single, highly integrated system divided into central and peripheral subdivisions

Question 2

CNS

Answer 2

Brain and spinal cord

Question 3

PNS

Answer 3

all nerves that enter and leave CNS

Question 4

Spinal cord

Answer 4

1. Transmits signals to and from brain
2. Controls spinal reflexes

Question 5

CNS brain

Answer 5

1. Cerebral hemispheres( thought integration)
2. Cerebellum ( balance, moto coordination, equilibrium)
3. Brain stem ( heartbeat, respiration, BP)

Question 6

PNS

Answer 6

messages to CNS and from CNS and to muscles and gland

Question 7

PNS composition

Answer 7

1. 12 pairs of cranial nerves
2. 31 pairs of spinal nerves

Question 8

Ganglia (PNS)

Answer 8

Group of nerve cell bodies outside brain and spinal cord

Question 9

Spinal nerves

Answer 9

1. 31 pairs
2. Mixed nerves (Sensory and motor)
3. Joined to cord by two roots

Question 10

Ventral root

Answer 10

Axons of motor neurons with cell bodies in grey matter of cord

Question 11

Dorsal root

Answer 11

Axons of sensory neurons with cell bodies in dorsal root ganglion (swell in dorsal root)

Question 12

Afferent division (PNS)

Answer 12

Sensory based and sends impulses INTO CNS

Question 13

Somatic sensory

Answer 13

From skin, muscles, bones and joints

Question 14

Visceral Sensory

Answer 14

From internal organs

Question 15

Efferent division (PNS)

Answer 15

Motor based and sends impulses AWAY from CNS

Question 16

Somatic efferent division function

Answer 16

CNS to skeletal muscles

Question 17

Autonomic division function

Answer 17

CNS to heart muscles, involuntary muscles and glands

Question 18

Somatic division (motor)

Answer 18

One nerve fibre containing no synapse or ganglion

Question 19

Autonomic division (motor)

Answer 19

Two motor neuron chain with synapse anf ganglion. Is unmyelinated

Question 20

Result of unmyelinated

Question 21

Somatic Motor Neurons

Answer 21

1. Cell bodies in CNS
2. One axon from cord to target tissue
3. Voluntary control
4. Myelinated axons

Question 22

Autonomic neurons

Answer 22

1. 2 neurons in motor pathway

b. 2nd body in ganglion to effector tissue
2. Involuntary
3. Unmyelinated axons

Question 23

Preganglionic neuron

Answer 23

a. 1st body in grey matter

Question 24

Postganglionic neuron

Answer 24

b. 2nd body in ganglion to effector tissue

Question 25

Sympathetic

Answer 25

Activated: Exercise, excitement, emergencies Pre: Short Post: Long Neuro: Acetylcholine and noradrenaline

Question 26

Parasympathetic

Answer 26

1. Concerned with conserving energy Pre: Long Post: Short Neuro: Acetylcholine