Metabolism , Enzyne, Diffussion,

Question 1

Metabolism

Answer 1

a large of chemical reactions take place in the cells

Question 2

Chemical reactions of metabolism

Answer 2

reactions that break down organic mater

reactions that build complex molecules to simpler substances

Question 3

What is Cellular respiration?

Answer 3

It is the chemical reaction in which glucose and oxygen are turned into water, carbon dioxide, and energy (ATP)

Question 4

What chemical reactions to plants do to survive?

Answer 4

They build new cells as proteins into their cells

Question 5

What’s enzymes?

Answer 5

Helpers to speed up the chemical reaction in your body

Question 6

How many enzymes in the human body?

Answer 6

Over 700 and each one is specific to a particular chemical reaction

Question 7

Do enzymes have a shape?

Answer 7

Yes, that allows attaching to the molecule

Question 8

What is a substrate?

Answer 8

It is what will be changed by the chemical reaction

Question 9

What changes are done in your body when you eat an apple?

Answer 9

The digestive system changes the complex molecules in the apple into chemical substances your body can use

Question 10

Carbohydrates are broken down into?

Answer 10

Glucose

Question 11

Proteins are broken down into?

Answer 11

Amino acids

Question 12

Lipids are broken down into

Answer 12

fatty acids and glycerol

Question 13

How these chemical substances go into the bloodstream?

Answer 13

Passing the thin walls of the small intestine, then walls of capillaries and lastly the bloodstream

Question 14

Where are the nutrients absorved?

Answer 14

In the villi ( small intestine)

Question 15

What is diffusion?

Answer 15

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration

Question 16

Is sweat a form of diffusion?

Answer 16

Yes, Diffusion of oxygen and carbon dioxide gas occurs in the lungs. … Heat from the body diffuses away in the form of sweat that evaporates

Question 17

Explain how the air you breath gets into your lungs?

Answer 17

First, nose and mouth

Then passes down the trachea, bronchi and bronchioles ending up in the alveoli

Question 18

What happens next?

After your answer, draw a diagram

Answer 18

The oxygen dissolves in the alveoli and then by diffusion gets into the blood
And keeps going on.

Question 19

Name the components of the circulatory system

Answer 19

Arteries, capillaries, veins, heart.

The heart is the pump that keeps the blood moving.

Question 20

What is a heartbeat?

Answer 20

It is made up of cardiac muscle. It contracts and relaxes.

Question 21

When does a person need a pacemaker?

Answer 21

Most often, pacemakers are used to speed up slow heart rates, but in some cases, they are used to slow down fast heart rates.

Question 22

When a defibrillator is used?

Answer 22

To give the heart a jolt with electric current. To restart the heart of a person who has suffered a heart failure

Question 23

What changes your heart rate?

Answer 23

Stress, vigorous exercise

Question 24

Changes in your heart rate running a cross country

Answer 24

Cellular respiration increases, so the carbon dioxide level in the blood

Question 25

What detects these changes?

Answer 25

By the receptors in the carotid artery ( neck) and aorta

Question 26

What are receptors?

Answer 26

They are cells that detect stimuli changes

Question 27

Do the receptor send messages to the brain to stimulate the heart to beat faster?

Answer 27

Yes, nerves can stimulate the heart.

Question 28

What produces energy to the cell?

Answer 28

Mitochondria. They are the power generators of the cell, converting oxygen and nutrients into adenosine triphosphate (ATP). ATP is the chemical energy “currency” of the cell that powers the cell’s metabolic activities.

Question 29

What waste treatments does the liver do?

Answer 29

breaks down hormones
breaks down haemoglobin
breaks down toxic substances( like alcohol) and most medicines
converts ammonia to urea

Question 30

How are the wastes removed

Answer 30

Through the liver to the kidneys and then excreted in the urine

Question 31

Who invented the first artificial pacemaker

Answer 31

Australian anaesthesiologist Dr Mark Lidwell, he used it to resuscitate a newborn baby in 1926

Question 32

What is an artificial pacemaker?

Answer 32

Small device placed in the chest or abdomen that use batteries to send electrical pulses to prompt the heart to beat at a normal rate

Question 33

What hormone is produced when you are stressed or have fear?

Answer 33

Noradrenalin

Question 34

What are horrmones?

Answer 34

Chemicals that act as messengers in the body.