BTEC Sport Level 3 Unit 1 Anatomy & Physiology L.A.C

Front

The respiratory system provides __________ to body tissues and removes waste products.

Back

Oxygen

Front

Main function of the respiratory system are...

Back

Pulmonary ventilation & gas exchange

Front

The chamber of the chest is known as the...

Back

Thoracic cavity

Front

The role of the intercostal muscles during INSPIRATION.

Back

External intercostals CONTRACT and internal intercostals RELAX. This lifts the ribs/thoracic cavity UP and OUT.

Front

The role of the intercostal muscles during EXPIRATION.

Back

External intercostals RELAX and internal intercostals CONTRACT. This lifts the ribs/thoracic cavity DOWN and IN.

Front

Select the correct answer which best describes the breathing mechanics during INSPIRATION.

Back

Ribs move up and out, diaphragm contracts and moves down/flattens, chest expands, external intercostal muscles contract.

Front

Explain the process of gas exchange at the alveoli.

Back

Concentration of oxygen in the alveoli is high. Concentration of oxygen in the blood is low. This creates a steeper diffusion gradient/ oxygen diffuses quicker. Oxygen moves from the alveoli into the blood.

Front

The respiratory control centre located in the _________________ ___________________ of the brain controls breathing.

Back

Medulla Oblongata

Front

Breathing rate is...

Back

An increase in the number of times you breathe per minute.

Front

What do Chemoreceptors detect changes in?

Back

in blood pH (acidity of blood)