Nervous system/ brain/reflexes

Question 1

What does the nervous system do?

Answer 1

It detects and reacts to stimuli

Question 2

What makes up the central nervous system?

Answer 2

The brain and the spinal chord

Question 3

What are sensory neurones?

Answer 3

Neurones that carry impulses from receptors to the CNS

Question 4

What are motor neurones?

Answer 4

Neurones that carry impulses from the CNS to the effectors

Question 5

What are effectors?

Answer 5

Muscles and glands which respond to your nervous system

Question 6

3 types of receptors

Answer 6

Taste, Sound, Light

Question 7

How do muscle effectors respond to impulses?

Answer 7

They contract

Question 8

How do glands effectors respond to impulses?

Answer 8

They secrete hormones

Question 9

The Central Nervous System ? the response

Answer 9

The Central Nervous System coordinates the response

Question 10

What are neurones?

Answer 10

They carry electrical impulses and information to and from the brain

Question 11

what’s the connection between two neurones called?

Answer 11

Synapses

Question 12

What happens when impulses reach the end of neurones?

Answer 12

They release chemicals which transferer the signal across the gap between neurones

Question 13

What are reflexes?

Answer 13

Rapid, automatic responses to certain stimuli that don’t involve the conscious part of the part

Question 14

What’s the order of the reflex ark?

Answer 14

Stimulus
Receptor
Coordination centre (CNS)
Effectors
Response

Question 15

The brain is responsible for ? behaviours

Answer 15

The brain is responsible for complex behaviours

Question 16

What are the 5 parts of the brain?

Answer 16

cerebral cortex
Medulla
Cerebellum
Hypothalamus
Pituitary gland

Question 17

What does the Cerebral cortex control?

Answer 17

Consciousness
Language
Intelligence
Senses
Memory

Question 18

What does the medulla control?

Answer 18

The unconscious activity:
Breathing
Heartbeat

Question 19

What does the cerebellum control?

Answer 19

muscle coordination
balance

Question 20

What does the hypothalamus control?

Answer 20

Body tempurature

Question 21

What does the Pituitary do?

Answer 21

It secretes hormones:
Eg: ADH, FSH

Question 22

What are the three types of brain scans?

Answer 22

MRI
CT
EEG

Question 23

How does a MRI scan work?

Answer 23

They use strong magnetic fields and radio waves

Question 24

How doe CT scans work?

Answer 24

They use x-rays
.Uses ionising radiation

Question 25

Advantages of MRI

Disadvantages of MRI

Answer 25

Advantages:
.Non- invasive
.Safe for pregnant woman and babies as there’s no ionising radiation
.Safer than CT scans

Disadvantages:
.Scan is noisy
.Claus trophic

Question 26

Advantages of CT scans

Disadvantages of CT scans

Answer 26

Advantages:
.Quicker than MRI scans
.Very accurate diagnosis of a vast array of conditions

Disadvantages:
.Uses ionising radiation
(cancer risks)

Question 27

Advantages of EEG scans

Disadvantages of EEG scans

Answer 27

Advantages:
.No electricity is put in the body, so it is very safe
.Can detect epilepsy, fits and memory problems
.Direct feedback from patient

Disadvantages:
.Can’t be used to detect cancer
.Need trained experts
.Risk of brain damage