Science - 4 part 1 Flashcards

1
Q

What is the difference between cells, tissues, and organs?

A

A groups of cells make up a tissue, a group of tissues work together to make up organs, which create organ systems

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2
Q

What is a cell?

A

what our bodies are made up of

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3
Q

why is oxygen needed for life processes

A

Oxygen helps organisms grow, reproduce, and turn food into energy

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3
Q

What is a tissue?

A

a group of cells

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3
Q

What is an organ system

A

system made up of cells and tissues

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4
Q

What is oxygen in cells?

A

This is known as diffusion. The movement of particles from an area of high concentration to low concentration

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4
Q

what is an organ

A

tissues work together to create organs

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4
Q

word equation for respiration

A

Glucose + Oxygen = Carbon Dioxide and Water

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5
Q

describe the importance of the respiratory system

A

The respiratory system allows life processes to occur, providing organs with oxygen.

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6
Q

What is exhalation

A

Decrease in volume, increase in pressure. Diaphragm relaxes

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6
Q

What is breathing?

A

The physical process where we inhale air into our lungs, and exhale air out

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6
Q

What is inhalation?

A

Increase in volume, decrease in pressure. Diaphragm contract and move down.

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6
Q

Difference between respiration and breathing?

A

Respiration is a chemical process that takes place in cells to release energy. Breathing is the physical process where you inhale and exhale air in and out of your lungs.

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6
Q

effects of smoking on respiratory system

A

reduced lung function and breathlessness

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6
Q

Describe a some long term effects of smoking

A

cancer, strokes, and heart attack etc

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7
Q

describe the importance of the circulatory system

A

delivers oxygen and nutrients to cells and takes away wastes.

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8
Q

How do blood get in and out of the heart?

A

Veins carry blood to the heart, arteries carry blood away from the heart

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9
Q

Example of artery

A

aorta

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10
Q

Example of vein

A

vena cava

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11
Q

describe how exercise affects the rate of your heartbeat

A

your heart typically beats faster so that more blood gets out to your body.

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12
Q

difference between anaerobic and aerobic respiration

A

aerobic is with oxygen, and happens first anaerobic is opposite

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13
Q

What are the 3 types of blood vessels?

A

arteries, capillaries, and veins

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14
Q

what is a cappillary?

A

exchanges nutrients + oxygen with tissues e.g a single cell

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15
Q

What is the structure of an artery?

A

Blood is high pressure so small lumen and thick muscle

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16
What is the structure of an capillary?
blood is low pressure and is single cell thick + permeable
17
What is the structure of an vein?
blood is low pressure, biggest lumen, small layer of elastic fibres / smooth muscle also has valves which prevent blood from flowing backwards
18
What is the importance of blood?
It carries nutrients around the body
19
What are the 4 components of blood?
White blood cell, red blood cell, patelets, plasma
20
What is the function of a white blood cell?
makes antibodies to aid the immune system
21
What is the function of a red blood cell?
carries oxygen to the cells
22
What is the function of a patelets
fragments of a cell which form blood clots too prevent blood loss
23
What is the function of plasma?
Carries food particles, waste products and red and white blood cells around the body
24
What is carcinogen?
Substance capable of causing cancer in the tissues
25
What is an epiglottis?
Small piece of cartilage protecting your voice box
26
What is a gas exchange?
When oxygen moves from the lungs to the bloodstream at the same time carbon dioxide passes through the blood
27
what is the atria?
Two upper chambers which pump blood to lower ventricles
28
what is the circulatory system?
Made up of pump (heart), and tubes (blood vessels) e.v veins and arteries
29
What is pullmanary?
lungs
30
Explain arteries
They carry blood away from the heart e.g aorta (to body, oxygenated). Pulmonary artery (to lungs, deoxygenated)
31
Explain capillaries
They exchange nutrients and oxygen with tissues ( they are a single cell )
32
Explain veins
They carry blood back to the heart e.g vena cava ( back from body, deoxygenated), pulmonary, (back from lungs, oxygenated)
33
why is oxygen needed for life processes?
respiration Chemical reaction where cells break down nutrient molecules (usually glucose) to release energy
34
What is the function of Nose and Mouth
Point of entry and exit for respiratory gases
35
What is the function of Epiglottis
Protects airway from food particles Closes over trachea when swallowing
36
What is the function of Trachea
Takes respiratory gases from mouth and nose to lungs, Lined with cartilage
37
What is the function of Diaphragm
Muscle involved in ventilation
38
What is the function of Bronchus (bronchi plural)
Takes respiratory gases to either right or left lung
39
What is the function of Bronchiole
Delivers respiratory gases to alveoli
40
What is the function of Alveoli (alveolus singular)
Site of gas exchange
41
describe the process of breathing
Air enters into our nose and mouth, goes through the pharynx, then larynx, through the trachea and into our bronchus and bronchioles. Then they reach the alveoli, where they diffuse into our blood
42
function of ribs
Protects the lungs
43
function of external intercostal muscles
lifts and expands the rib cage, allowing for exhalation
44
function of internal intercostal muscles
pull down on the rib cage and push air out of the lungs.
45
what is the volume of throax
When inhaling, volume increases When exhaling, volume decreases
46
define carcinogen
A substance that causes cancer
47
define addictive
The more you use them, the more you rely on and need them
48
what are tube networks
vessals
49
what are valves
one way blood flow
50
what is a heart
pump
51
What is you pulmonary artery?
Carries deoxygenated blood from right ventricle to lungs
52
What is you pulmonary vein?
carries oxygenated blood from lungs to left atrium
53
What is your vena cava
Carries deoxygenated blood from the body to right atrium
54
what is a aorta
Carries oxygenated blood from left ventricle to body
55
How does excercise affect your heart rate
During exercise, your heart typically beats faster so that more blood gets out to your body