Exploring Connections in Mathematics

What is the main focus of the second lab?

• The relationship between hydration and heart rate

• The impact of sleep on heart rate

• The effect of diet on heart rate

• The relationship between pen squeezes and heart rate

Why does our heart rate increase during exercise?

• To decrease oxygen levels

• To reduce blood pressure

• To transport more blood to the cells

• To cool down the body

What role do blood vessels play in the circulatory system?

• They regulate body temperature

• They store oxygen

• They transport materials to and from cells

• They produce blood cells

What happens to the heart rate when we exercise?

• It stops temporarily

• It increases

• It remains the same

• It decreases

What is muscle fatigue?

• An increase in muscle flexibility

• A condition where muscles grow stronger

• A buildup of waste products in the cells

• A decrease in muscle size

What was the heart rate range for most students in the class experiment?

• 51 to 60

• 81 to 90

• 61 to 70

• 71 to 80

What does an increased pulse rate indicate about the heart?

• The heart is beating slower

• The heart is at rest

• The heart is beating faster

• The heart is not functioning

Which two body systems interact to maintain homeostasis during high muscle activity?

• Endocrine and lymphatic systems

• Skeletal and muscular systems

• Digestive and nervous systems

• Respiratory and circulatory systems

How can the validity of an experiment be increased?

• By shortening the experiment duration

• By using fewer participants

• By repeating the experiment multiple times

• By changing the hypothesis

What is the dependent variable in the heart rate experiment?

• The number of participants

• The duration of the experiment

• The heart rate

• The type of exercise