Respiration is a chemical reaction which releases energy from food. The respiratory system exchanges the gases which are involved in respiration.
Which part of the cell is responsible for aerobic respiration?
Why does aerobic respiration provide more energy for use than anaerobic respiration?
It doesn’t use oxygen
It completely breaks down the glucose
It is faster
In which situation are you more likely to carry out anaerobic respiration?
While sitting in a chair
While running a marathon
While sprinting 100 m
The rings that support the trachea are made of which substance?
What is the first process to occur when breathing in (inspiration)?
The lungs fill with air
The ribs move up and out
The intercostal muscles contract
The alveoli are at the end of which small tubes?
In the bell jar model the rubber sheet represents which structure in the human body?
Compared to atmospheric air, exhaled air contains which of the following?
Less water vapour
Less carbon dioxide
Which of these features increases the rate of diffusion across the surface of the alveoli?
Small surface area for diffusion
Moist surface for gases to dissolve before diffusing
Thick walls to maximise diffusion distance
Which of the substances found in cigarette smoke contains a carcinogen (cancer causing chemical)?