Cells and Control

Question 1

What are the stages of mitosis?

Answer 1

Prophase, metaphase, anaphase, telephase

Question 2

What happenes at prophase?

Answer 2

DNA replicates to form 2 copies of each chromosome

Question 3

What happnes at metaphase?

Answer 3

Cell membrane breaks down and chromosomes line up in the middle

Question 4

What happens at anaphase?

Answer 4

One set of chromsomes are pulled to each end of the cell

Question 5

What happens at telephase?

Answer 5

Cytoplasm and cell membrane divide to form two identical cells

Question 6

What is interphase?

Answer 6

Initial cell begins to divide

Question 7

Define the process of mitosis

Answer 7

When two identical daughter cells are produced

Question 8

When will mitosis occur?

Answer 8

When an organisms grows, repairs or asexual reproduction happens

Question 9

What is meoisis?

Answer 9

This happens in sexually reproducing organisms, basically repeats mitosis but twice so we are left with four cells each with one chromosome.

Question 10

What can stem cells be used for?

Answer 10

Treating conditions and diseases

Question 11

What are stem cells?

Answer 11

They are cells that can be divide and differentiate into new cells

Question 12

Where are stem cells found?

Answer 12

Early embryo development

Question 13

Why can stem cells be ethically controversial?

Answer 13

Some belive it is killing a living thing at the embryo stage

Question 14

How is camcer formed?

Answer 14

When cells divide uncontrollably

Question 15

When DNA copies itself what does it form?

Answer 15

Strings of chromosomes

Question 16

Where is DNA found?

Answer 16

The nucleus

Question 17

Where does mitosis take place?

Answer 17

Nucleus

Question 18

What are the type of nerve cells?

Answer 18

Sensory, motor and relay

Question 19

What are the roles of the different types of neurons?

Answer 19

Sensory- carry signal to central nervous system
Motor- carry signal away from central nervous system
Relay- carry signal within central nervous system

Question 20

What parts of the nervous system detect stimuli?

Answer 20

The receptors

Question 21

What does the co ordination centre do?

Answer 21

It recieves and processes information from the receptors

Question 22

What is the role of effectors?

Answer 22

They send responses to restore body regulations such as temperature and blood glucose levels

Question 23

What is a reflex arc?

Answer 23

An automatic response sent to stimulus to protect the body from harm such as something hot or sharp

Question 24

Describe the process that occurs in the synapse

Answer 24

1- Electrical impulse travles along the first axon
2- This triggers the nerve ending into releasing neurotransmitters
3- Neurotransmitters diffuse across the synapse and bind with receptor molecules on the cell membrane of the second neurone
4- These receptor molecules on the second neurons bind to specific neurotransmitters
5- This stimulates the second neurone to transmit an electrical impulse