IB SEHS 2.1 Ventilatory Review

Front

What happens when chemoreceptors detect a slight decrease in pH?

Back

This indicates that carbon dioxide concentrations have increased, leading to an increase in breathing rate.

Front

Define vital capacity.

Back

Vital capacity is the total volume of air that can be voluntarily moved in one breath.

Front

What are alveoli?

Back

Alveoli are small sacs in the lungs specially adapted for gas exchange.

Front

What is the purpose of gas exchange in the body?

Back

Gas exchange is needed to supply oxygen to cells and remove carbon dioxide.

Front

How is total lung capacity calculated?

Back

Total lung capacity is equal to vital capacity plus residual volume.

Front

What role do bronchioles play in the respiratory system?

Back

Bronchioles are small air passages that lead to the alveoli where gas exchange occurs.

Front

What is the function of the diaphragm in respiration?

Back

The diaphragm contracts to create a vacuum that allows air to flow into the lungs.

Front

Explain the term 'residual volume'.

Back

Residual volume is the volume of air remaining in the lungs after a maximal expiration.

Front

What is tidal volume?

Back

Tidal volume is the volume of air inhaled or exhaled in a single breath at rest.

Front

What is the significance of the trachea in the respiratory system?

Back

The trachea is the windpipe that connects the throat to the lungs, allowing air to pass through.