Producing New Cells and Control & Communication

Question 1

cell division is controlled by:

Answer 1

nucleus

Question 2

Three distinct region of the brain:

Answer 2

• Cerebrum
• Cerebellum
• Medulla

Question 3

Responsible for controlling balance and co-ordination

Answer 3

Cerebellum

Question 4

Enables conscious thoughts and memory

Answer 4

Cerebrum

Question 5

Controls breathing and heart rates

Answer 5

Medulla

Question 6

The Nervous system:

Answer 6

• brain
• spinal cord
• nerves

Question 7

The Central nervous system:

Answer 7

• Brain

- Spinal Cord

Question 8

What does nerves uses to send messages from one part of the nervous system to another

Answer 8

-Electrical impulses

Question 9

Stimuli - Receptors:

Answer 9

Sensory neuron

Question 10

Motor Neuron - Effectors:

Answer 10

Responses

Question 11

Reflex actions are:

Answer 11

rapid, involuntary responses to stimuli that indicate the body could be in danger.

Question 12

gaps between neurons where chemicals are released:

Answer 12

Synapses

Question 13

Chemical messengers release directly into the bloodstream by:

Answer 13

endocrine

Question 14

Chemical messengers that are released directly into the bloodstream are called

Answer 14

Hormones

Question 15

If mitosis becomes uncontrolled this can lead to:

Answer 15

the formation of cancer cells and tumours

Question 16

Adults tissue stem cells can only:

Answer 16

produce a few different cell types

example: bone marrow

Question 17

Cells are different in appearance and :

Answer 17

function due to having become specialised.

Question 18

Guard Cell:

Answer 18

Function: Allows gases in and out of leaves

Adaptation: cells change shape due to water content that controls pore size

Question 19

Neuron

Answer 19

Function: deliver electrical impulses

Adaptation: long and thin with many projections to allow communication with other neurons

Question 20

Red blood cells

Answer 20

Function: carries oxygen around the body

adaptation: large surface area and no nucleus to carry more haemoglobin that binds oxygen

Question 21

root hair cell

Answer 21

function: absorbs water
adaptation: large extensions to increase surface area