Effects of exercise on pulse rate | Starter Quiz | Oak National Academy

Match the variable to its description.

• control

• The variable that you keep the same.

• independent

• The variable that you measure.

• dependent

• The variable that you change.

Answer explanation

In an investigation, you want to see how a change in the independent variable changes the dependent variable. Control variables need to be kept the same to ensure they do not affect the results.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Which changes would you experience during exercise?

• increased heart rate

• lower amount of oxygen needed

• increased breathing rate

• reduced heart rate

Answer explanation

When we exercise, our muscle cells need energy to contract. This energy comes from cellular respiration. By breathing faster we are taking in more oxygen. A faster beating heart will transport this oxygen to the muscle cells more quickly.

What type of blood vessel transports blood away from the heart?

• veins

• aorta

• capillaries

• arteries

• vena cava

Answer explanation

Arteries carry blood under high pressure away from the heart. The aorta is an example of an artery.

What makes up the circulatory system?

• heart

• blood

• nose

• blood vessels

• lungs

Answer explanation

Substances such as oxygen and carbon dioxide are moved around the body in blood. Blood flows through blood vessels; arteries, veins and capillaries. Blood is pumped around the body by the heart.

What cellular process provides the body with energy?

Answer explanation

Cellular respiration provides the body with energy.

Tags

NGSS.HS-LS1-7

Where does cellular respiration take place?

• cell membrane

• mitochondria

• ribosomes

• nucleus

• chloroplasts

Answer explanation

Mitochondria are where cellular respiration takes place. Cells have many mitochondria.

Tags

NGSS.MS-LS1-7