The Marathon Runner: Oxygen and CO₂ Levels During Exercise

The Marathon Runner: Oxygen and CO₂ Levels During Exercise

9th Grade

15 Qs

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The Marathon Runner: Oxygen and CO₂ Levels During Exercise

The Marathon Runner: Oxygen and CO₂ Levels During Exercise

Assessment

Quiz

Science

9th Grade

Practice Problem

Hard

NGSS
HS-LS1-3, HS-LS1-7, HS-LS2-3

+1

Standards-aligned

Created by

Cynthia Mejia

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During exercise, how does oxygen concentration in arterial blood compare to venous blood?

Same in both

Higher in arterial blood

Higher in venous blood

Neither has oxygen

Tags

NGSS.HS-LS1-3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is oxygen concentration lower in venous blood during exercise?

Lungs are not working as hard

Arteries don’t carry oxygen

Blood is moving too fast

Muscles are using more oxygen for energy

Tags

NGSS.HS-LS2-3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Arterial blood delivers oxygen-rich blood to the body, while venous blood carries oxygen-poor blood back to the heart.

True

False

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to CO₂ concentration in venous blood during exercise?

Decreases

Increases

Stays the same

Disappears

Tags

NGSS.HS-LS1-7

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does CO₂ concentration increase in venous blood during exercise?

Lungs are producing CO₂

Blood can’t hold oxygen

Muscles are producing more CO₂ as waste during respiration

Brain sends more signals

Tags

NGSS.HS-LS1-3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The main waste product of cellular respiration that leaves the muscles during exercise is carbon dioxide.

True

False

Tags

NGSS.HS-LS2-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is arterial O₂ concentration stays fairly stable during exercise?

Arterial blood comes directly from the lungs

Arterial blood comes from the muscles

Arterial blood is mixed with venous blood

Arterial blood doesn’t carry gases

Tags

NGSS.HS-LS1-3

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