Biology - second half

Question 1

Digestive system

Answer 1

Breaks down the food for nutrients

Question 2

Circulatory system

Answer 2

Transports blood and nutrients around the body

Question 3

Endocrine system

Answer 3

A network of glands and tissue that create and release hormones throughout the body

Question 4

Excretory system

Answer 4

The process of getting rid of watse from the body.

Question 5

Muscular system

Answer 5

Enables movement

Question 6

Nervous system

Answer 6

Sends and passes signals throughout our body.

Question 7

Reproduction system

Answer 7

Increasing numbers of organisms

Question 8

Respiratory system

Answer 8

generating energy from food

Question 9

Skeletal system

Answer 9

Structural support and protection. The framework of the body

Question 10

Homeostasis

Answer 10

The body’s ability to maintain it’s internal processes despite the external changes.

Question 11

Metabolism

Answer 11

The chemical process that maintains life.

Question 12

Anabolism

Answer 12

Reactions that build up matter

Question 13

Catabolism

Answer 13

Reactions that break down matter

Question 14

Enzyme

Answer 14

Proteins that speed up chemical reactions.
Without them reactions would be too slow to maintain life.

Question 15

Enzyme ‘active site’

Answer 15

The place where the enzyme and substrate bind for a reaction to take place

Question 16

Denatures

Answer 16

Changes shape

Question 17

Carbohydrates

Answer 17

Broken down into glucose

Question 18

Proteins

Answer 18

Broken down into amino acid

Question 19

Lipids

Answer 19

Broken down into fatty acids and glcerol

Question 20

Why do foods need to be broken down?

Answer 20

So the smaller/ simpler substances can be absorbed by the small intestines into the blood stream.

Question 21

Negative Feedback

Answer 21

When a change occurs in a cycle and something is added into it to make it return back to its original state

Question 22

Positive Feedback

Answer 22

When a change occurs in a cycle and something is added into it increasing the effects/changes.
Does not return to original state

Question 23

What are the main organs of the Excretory system?

Answer 23

Kidney, Ureter, Bladder and Urethra

Question 24

CENTRAL NERVOUS SYSTEM-

Answer 24

• Made up of the brain and the spinal chord
• recieves and processes the infomation from all over the body and then send out messages one how to respond.

Question 25

PERIPHERAL NERVOUS SYSTEM-

Answer 25

- Made up of all the nerves in the body - Carries messages to and from other parts of the body to CNS

Question 26

Neurons

Answer 26

Specialised cells that transmit electrical messages from one prat of your body to another at very high speeds

Question 27

Nerve impulses

Answer 27

The electrical messages/signals. Only travels in one direction (you could say it's fav band is one direction)

Question 28

Cell body

Answer 28

Contains the nucleus, control center of the cell

Question 29

Dendrites

Answer 29

branch out from cell body and receive messages from other nerve cells

Question 30

Axon

Answer 30

a long thin thread that sends nerve impulses/signals away from cell body

Question 31

Axon terminal

Answer 31

Pass the signals to the next neuron

Question 32

Neurotransmitter

Answer 32

The chemical released into the space between the neurons. Carries the message from the axon of one neuron to the dendrite of another neuron.

Question 33

Synapse

Answer 33

The space between the neurons

Question 34

Myelin Sheath

Answer 34

A white fatty insulating layer that insulates the neurons from eachother and increases the speed of the nerve impulse.

Question 35

3 types of neurons

Answer 35

Sensory, Inter, Motor/effector

Question 36

Sensory Neuron

Answer 36

Sends signals from the peripheral nervous system to the central nervous system

Question 37

Inter Neurons

Answer 37

Sends signals between the motor and sensory neurons

Question 38

Motor Neurons

Answer 38

Sends signals from the CNS to the muscles to cause action