Gas Exchange Quiz

Gas Exchange Quiz

7th Grade

50 Qs

quiz-placeholder

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Gas Exchange Quiz

Gas Exchange Quiz

Assessment

Quiz

Science

7th Grade

Hard

Created by

Adriana Dima

Used 1+ times

FREE Resource

50 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where does gas exchange primarily occur in human lungs?

Trachea

Bronchi

Alveoli

Bronchioles

Answer explanation

Gas exchange primarily occurs in the alveoli, which are tiny air sacs in the lungs. They provide a large surface area for oxygen and carbon dioxide to be exchanged between the air and the bloodstream.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main gas exchanged in the alveoli?

Nitrogen

Oxygen

Helium

Hydrogen

Answer explanation

The main gas exchanged in the alveoli is oxygen. During respiration, oxygen from the air enters the alveoli and diffuses into the blood, while carbon dioxide is expelled from the blood into the alveoli to be exhaled.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which process is responsible for gas exchange in the lungs?

Active transport

Osmosis

Diffusion

Filtration

Answer explanation

Diffusion is the process by which oxygen and carbon dioxide move across the alveolar membrane in the lungs. This passive movement occurs from areas of higher concentration to lower concentration, facilitating gas exchange.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which gas is released from the blood into the alveoli during gas exchange?

Oxygen

Carbon monoxide

Nitrogen

Carbon dioxide

Answer explanation

During gas exchange in the lungs, carbon dioxide is released from the blood into the alveoli to be exhaled. This process is essential for removing waste gases from the body, making carbon dioxide the correct answer.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of hemoglobin in gas exchange?

Transport oxygen

Transport carbon dioxide

Remove nitrogen

Store energy

Answer explanation

The primary function of hemoglobin is to transport oxygen from the lungs to the tissues. It binds oxygen molecules, facilitating efficient gas exchange, which is crucial for cellular respiration.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which structure in fish is primarily responsible for gas exchange?

Lungs

Gills

Skin

Fins

Answer explanation

Gills are the primary structures in fish responsible for gas exchange. They extract oxygen from water and expel carbon dioxide, allowing fish to breathe underwater, unlike lungs which are used by terrestrial animals.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What factor influences the rate of diffusion during gas exchange?

Concentration gradient

Blood volume

Pressure of air

Muscle contraction

Answer explanation

The concentration gradient is the primary factor influencing the rate of diffusion during gas exchange. A higher concentration gradient allows gases to diffuse more rapidly from areas of high concentration to low concentration.

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