Making Connections

The buildup of waste products in muscle cells that are active might cause

• Digestion

• Increased fatigue

• Cellular respiration

• Decreased heart rate

Which two body systems work together to remove wastes produced by exercising from cells?

• Immune and Endocrine

• Digestive and Skeletal

• Respiratory and Circulatory

• Circulatory and Digestive

In order for muscle fatigue to end, the muscle cells must be provided with

• Oxygen

• Carbon Dioxide

• Nitrogen

• Amino Acids

Tags

NGSS.HS-LS1-7

in our experiment, the number of times a clothespin can be squeezed is the

• Independent Variable

• Dependent Variable

• Hypothesis

• Control

A marathon runner frequently experiences muscle cramps while running. This is because

• The runner is running too slowly

• The runner warmed up before running

• There was increased glucose production in the muscle

• There was a lack of adequate oxygen supply to the muscles

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

What would be a hypothesis for the Making Connections Lab?

• Can students squeeze a clothespin more times after resting?

• Record the number of squeezes

• If you rest then you will squeeze the clothespin faster.

• What is the total number of squeezes in one minute?

When people watch exciting sports on TV, their pulse rate increases. How can this be tested?

• By observing their behavior as they watch TV

• By doing a controlled experiment

• By watching sports with friends

• By turning off the TV

Heart rate can be indirectly measured in the classroom by

• measuring the pulse rate

• using a thermometer

• using a stethoscope

• squeezing a clothespin

What body system are you measuring the activity of when you are measuring your pulse rate?

• digestive

• circulatory

• respiratory

• excretory

Which body system brings in oxygen into your body?

• circulatory

• digestive

• immune

• respiratory