LE Fall 2024 Flashcard # 11 - Making Connections State Lab

Front

What happens to a person's breathing and heart rates during vigorous physical activity?

Back

They increase, allowing cells to perform more efficiently by removing waste products faster.

Front

What is a normal resting pulse rate for a student?

Back

69 beats/min.

Front

What causes muscle fatigue during prolonged exercise?

Back

Lack of oxygen and build-up of waste in the muscles.

Front

Why might someone not accept a claim that pulse rate increases when watching an exciting sporting event?

Back

The claim may not be accepted because the student did not take pulse rates before the game started.

Front

What is the purpose of finding respiratory rates of students at rest during an exercise study?

Back

To use as a comparison.

Front

Define 'pulse rate'.

Back

The number of heartbeats per minute.

Front

What is the role of oxygen in muscle performance during exercise?

Back

Oxygen is essential for aerobic respiration, which produces energy for muscle contractions.

Front

Explain the concept of muscle fatigue.

Back

Muscle fatigue occurs when muscles can no longer sustain the required force, often due to a lack of oxygen and accumulation of lactic acid.

Front

What is the significance of controlling variables in an experiment?

Back

Controlling variables ensures that the results are due to the factor being tested, increasing the validity of the experiment.

Front

What is the relationship between exercise intensity and heart rate?

Back

As exercise intensity increases, heart rate also increases to supply more oxygen to the muscles.