Respiration mid term science year 8

Where does take place in the cell?

Mitochondria

What is the aerobic respiration formula?

Glucose + oxygen —> Energy, carbon dioxide, water

What is the anaerobic respiration formula?

Glucose —> Lactic acid + a bit of energy

Explain gas exchange in the alveoli in terms of diffusion

Air that is breathe in has a high concentration of oxygen and the blood in the capillaries has a low concentration of oxygen, so oxygen from the alveoli diffuses into the capillaries because it has a low concentration, and into the bloodstream.

State the differences between inhaled and exhaled air

Inhaled air has more oxygen content than exhaled air

Exhaled air has more carbon dioxide content than inhaled air

Inhaled air’s water vapor levels variable while exhaled air is saturated

Label this diagram

1 = Nasal cavity

2 = Left Bronchi

3 = Bronchioles

4 = Alveolus

5 = Pharynx

6 = Trachea

7 = Right bronchi

8 = diaphragm

What does arteries do?

Are large and carries blood away from the heart

What does veins do?

Are large and carries blood towards the heart

What does capillaries do?

Are small, delivers glucose and oxygen to cells and remove waste products

why does the left side of the heart have thicker muscle than the right?

The left side pumps blood to the entire body (needing more blood)

The right side only pump blood to the lungs

State the effects of smoking on the respiratory and circulatory systems

Respiratory system: Increase risk of lung cancer

Circulatory system: Increase risk of blood clots and heart rate

Label this diagram

V, C (left side) - Vena Cava(carries deoxygenated blood from body to heart, are veins)

R, A (left side) - Right Atrium (receives deoxygenated blood from Vena Cava and send the deoxygenated blood to the right ventricle)

R, V (left side) - Right Ventricle (Pumps deoxygenated blood out to the lungs)

P, A (top left) - Pulmonary arteries (takes the blood to the lungs)

A (top right) - Aorta (takes oxygenated blood to the body)

P, V (right side) - Pulmonary veins (Carries oxygenated lungs to the heart)

L, A (right side) - Left Atrium (receives oxygenated blood from pulmonary veins and send the deoxygenated blood to the left ventricle)

L, V (right side) - Left ventricle (Pumps oxygenated blood out to the body)

What does lactic acid do?

Lactic acid cause muscle cramps and a build up can lead to a burning sensation.