Year 7 Science: Aerobic Respiration

Practice flashcards covering key definitions, equations, cellular sites, and transport mechanisms for Year 7 aerobic respiration.

What is aerobic respiration?

A reaction that releases energy from glucose using oxygen.

What is the word equation for aerobic respiration?

$$\text{glucose} + \text{oxygen} \rightarrow \text{carbon dioxide} + \text{water} + \text{energy}$$

What are the reactants of aerobic respiration?

Glucose and oxygen.

What are the products of aerobic respiration?

Carbon dioxide and water (with energy released).

In which cellular structures does aerobic respiration take place?

Mitochondria.

Why do muscle cells contain many mitochondria?

Muscle cells need lots of energy for movement, so they carry out lots of aerobic respiration.

What is glucose and what is its role in cells?

A type of sugar used by cells to release energy.

What is plasma and how does it transport glucose?

The liquid part of blood that transports dissolved substances, including dissolved glucose.

What is haemoglobin and what is its role in respiration?

A protein in red blood cells that carries oxygen.

What are alveoli?

Tiny air sacs in the lungs where gas exchange occurs.

From where is digested glucose absorbed into the blood?

The small intestine.

What pathway does oxygen take from the air to reach body cells?

Air enters the lungs, diffuses into the blood at the alveoli, is carried by haemoglobin in red blood cells, and diffuses into cells.

What pathway does carbon dioxide take to leave the body?

It is produced in cells, carried by the blood to the lungs, diffuses into the alveoli, and is exhaled.

Why must carbon dioxide be removed from the body?

It is a waste product of respiration and would build up to harmful levels if it remained in the body.

How does the digestive system contribute to cellular respiration?

It breaks down carbohydrates (such as those in bread and rice) into glucose.