Respiratory and circulatory system

Respiratory and circulatory system

7th Grade

30 Qs

quiz-placeholder

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Respiratory and circulatory system

Respiratory and circulatory system

Assessment

Quiz

Science

7th Grade

Practice Problem

Hard

Created by

Shana Shukoor

Used 1+ times

FREE Resource

30 questions

Show all answers

1.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The trachea branches into two narrower airways called ____________

Answer explanation

The trachea branches into two narrower airways called bronchi. These bronchi lead to the lungs, allowing air to flow in and out during respiration.

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Capillaries surround the ________________ , where gas exchange occurs.

Answer explanation

Capillaries surround the alveoli, which are tiny air sacs in the lungs. This is where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be removed.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which body system helps the respiratory system bring oxygen into the body?

circulatory

digestive

excretory

muscular

Answer explanation

The muscular system aids the respiratory system by facilitating breathing. Muscles like the diaphragm contract to allow air to enter the lungs, thus helping to bring oxygen into the body.

4.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The narrow blood vessels where gas exchange occurs are

________________

Answer explanation

The narrow blood vessels where gas exchange occurs are called capillaries. They facilitate the exchange of oxygen and carbon dioxide between blood and tissues.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A blockage of blood vessels in the brain can cause

a heart attack

a stroke

heart failure

hypertension

Answer explanation

A blockage of blood vessels in the brain restricts blood flow, leading to a stroke. This condition can cause brain damage and loss of function, unlike a heart attack, heart failure, or hypertension, which affect the heart.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of the blood carries dissolved molecules such as glucose and salt?

plasma

platelets

red blood cells

white blood cells

Answer explanation

The plasma is the liquid component of blood that carries dissolved substances like glucose and salts, making it essential for transporting nutrients and waste products throughout the body.

7.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The large muscle that contracts and relaxes to move gases into and out of the lungs is the ___________

Answer explanation

The diaphragm is the primary muscle responsible for breathing. It contracts to draw air into the lungs and relaxes to push air out, making it essential for gas exchange.

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