SB2

Question 1

What is mitosis a type of

Answer 1

Cell division

Question 2

What are the stages of mitosis

Answer 2

IPMATC
INTERPHASE- the cell duplicates its DNA
PROPHASE- membrane around nucleus breaks down
METAPHASE- chromosomes line up in centre of cell
ANAPHASE- cell fibres pull chromosomes apart
TELOPHASE- the nucleus divides
CYTOKINESIS- two identical daughter cells form

Question 3

Define cell differentiation

Answer 3

The process of when a cell becomes specialised

Question 4

Define growth

Answer 4

An increase in size or mass

Question 5

Define cell elongation

Answer 5

Cell expands making plant grow

Question 6

What are undifferentiated cells called

Answer 6

Stem cells

Question 7

Where are stem cells found

Answer 7

Human embryos

Bone marrow

Question 8

Disadvantages of using stem cells

Answer 8

Rumour development
Rejection
Disease transmission

Question 9

What does the cerebellum control and where’s it found

Answer 9

Muscles coordination and balance

Behind spinal cord

Question 10

What does the cerebral cortex control and where’s it found

Answer 10

Largest part of brain
Two halves
Movement memory language vision intelligence

Question 11

What does the medulla oblongata control and where’s it found

Answer 11

Bottom near spinal cord

Controls breathing and heart rate

Question 12

What are the two scanners to investigate brain function

Answer 12

PET scan

CT scan

Question 13

How/what does the CT scan :

Work
Show

Answer 13

Uses xrays to produce image of brain

Shows structure of brain
Can show a damaged brain and identify the area

Question 14

How/what does the PET scan :

Work
Show

Answer 14

Radioactive chemicals To show what part of the Brian is active

Very detailed

Can show structure and function at the same time

Question 15

What does the CNS stand for

Answer 15

Central nervous system

Question 16

What is the CNS made of

Answer 16

Neurones which go to all parts of the body

Question 17

What are sensory receptors

Answer 17

Cells that can detect a change in the environment

Question 18

How does the CNS coordinate a response

Answer 18

Stimulus 
Receptor 
Sensory neurone 
CNS 
Motor neurone 
Effector 
Response

Question 19

Sensory neurone context

Answer 19

One long dendron
Carries nerve impulses
From receptor cells to cell body

One short axon carries nerve impulses from the cell body to the CNS

Question 20

Motor neurone context

Answer 20

Many short
Carries nerve impulses
From CNS to the cell body

One Long axon carries nerve impulses from cell body to effector cell

Question 21

Relay neurone Context

Answer 21

Many short dendrites
Carries nerve impulses
Sensory neurones to cell body

An axon carries nerve impulses from the cell body to motor neurones

Question 22

What do neurones transfer information as

Answer 22

Electrical impulses

Question 23

Define synapes

Answer 23

Connection between two neurones

Question 24

Define reflexes

Answer 24

Rapid responses to stimuli

Question 25

In which order do the neurones act

Answer 25

Sensory Relay Motor

Question 26

What does the cornea do

Answer 26

Bends light into the eye

Question 27

What does the iris do

Answer 27

Controls how much light enters pupil

Question 28

What does the lens do

Answer 28

Bends light focusing it onto retina

Question 29

What does the retina do

Answer 29

Detect light through receptor cells called rods and cones

Question 30

Advantages and disadvantages of rod cells

Answer 30

ADVANTAGES sensitive in dim light DISADVANTAGES Can’t sense colour

Question 31

Advantages and disadvantages of cones

Answer 31

ADVANTAGES sensitive to different colours DISADVANTAGES not good in dim light

Question 32

What does the optic nerve do

Answer 32

Carries electrical impulses about information from the light from receptor cells to brain

Question 33

What is cataract

Answer 33

A cloudy patch on the lens