Revision Chapter 1

During a long-distance run, why does your breathing rate increase, and how does this change help maintain your body’s stability?

• To increase oxygen intake and remove carbon dioxide, helping maintain energy levels and pH balance.

• To decrease oxygen intake and conserve energy for the muscles.

• To increase carbon dioxide levels in the blood for better circulation.

• To reduce the heart rate and conserve oxygen.

Which part of the respiratory system is also known as the windpipe?

• Trachea

• Bronchioles

• Larynx

• Pharynx

Which organ in the human respiratory system is responsible for filtering and warming the air we breathe?

• Lungs

• Nasal cavity

• Diaphragm

• Trachea

What is the primary function of the human respiratory system?

• To deliver oxygen and remove carbon dioxide

• To pump blood throughout the body

• To digest food and absorb nutrients

• To regulate body temperature

State two functions of the respiratory system.

• Transporting nutrients and producing hormones

• Gas exchange and supplying oxygen to the body

• Digesting food and absorbing nutrients

• Producing energy and regulating temperature

What is the correct order of air passage in the respiratory system?

• Nose → Bronchi → Bronchioles → Trachea → Alveoli

• Nose → Trachea → Bronchi → Bronchioles → Alveoli

• Nose → Bronchioles → Bronchi → Trachea → Alveoli

• Nose → Alveoli → Bronchioles → Bronchi → Trachea

Gas exchange happens in which part of the lungs?

• Bronchi

• Trachea

• Alveoli

• Diaphragm

The walls of the air sacs (alveoli) are:

• Thick and strong

• Thin and elastic

• Made of muscle

• Full of bones

The gas that leaves the blood during gas exchange is:

• Oxygen

• Carbon dioxide

• Hydrogen

• Nitrogen

Which two muscles control breathing?

• Arm and leg muscles

• Intercostal muscles and diaphragm

• Neck and shoulder muscles

• Heart and lungs