Respiratory System/Making Connections

Front

What is the primary function of the respiratory system?

Back

To facilitate the exchange of oxygen and carbon dioxide between the body and the environment.

Front

What is the role of the diaphragm in respiration?

Back

The diaphragm contracts and flattens to create a vacuum that pulls air into the lungs.

Front

What is pulse rate?

Back

The number of times the heart beats per minute.

Front

How does physical activity affect pulse rate?

Back

Physical activity increases pulse rate to supply more oxygen to the muscles.

Front

What is muscle fatigue?

Back

A temporary condition where muscles become weak and tired due to prolonged activity.

Front

What is the relationship between pulse rate and oxygen supply during exercise?

Back

As pulse rate increases, more oxygen is supplied to the muscles to meet energy demands.

Front

What body system is responsible for transporting oxygen and nutrients?

Back

The circulatory system.

Front

What happens to the pulse rate when a person is at rest?

Back

The pulse rate decreases as the body requires less oxygen and energy.

Front

What is a controlled experiment?

Back

An experiment where all variables are kept constant except for the one being tested.

Front

What is the significance of measuring pulse rate during different activities?

Back

It helps to understand how the body responds to various levels of physical exertion.