Chapter 2.3a Control and Communication: Nervous System Flashcards Preview

FULL COURSE National 5 Biology > Chapter 2.3a Control and Communication: Nervous System > Flashcards

Flashcards in Chapter 2.3a Control and Communication: Nervous System Deck (18):
1

The parts of the nervous system are the

brain, spinal cord, the nerves and the sense organs

2

The nervous system is made up of cells called

neurons

3

There are three basic types of neuro:

Sensory, relay and motor

4

The Central Nervous System (CNS) is made up of the

brain and the spinal cord

5

The brain is made up of the

cerebrum, cerebellum and medulla

6

The cerebrum is responsible for

conscious thoughts, reasoning, memory and emotions

7

The cerebellum controls

balance and co-ordination

8

The medulla controls involuntary functions such as

breathing, heart rate and peristalsis

9

The CNS processes information from the

Sense organs and coordinates responses

10

Sense organs contain receptor cells which generate

electrical impulses in response to stimuli

11

Electrical impulses pass from

sensory neurons to relay neurons within the CNS

12

Relay neurons within the CNS pass electrical impulses to

motor neurons

13

Motor neurons pass electrical impulses to

effectors which bring about a response

14

Reflex actions are very rapid since they involve only

a few neurons and do no require complex processing of information by the brain

15

Reflex actions help

protect the body from harm

16

The group of neurons involved with the structure and function of a reflex action is called a

reflex arc

17

A synapse is a

narrow gap between the neurons

18

Chemicals are released into the synapse from the neuron leading to it. These chemicals allow an

electrical impulse to be generated in the next neuron after the synapse.