How do the walls of capillaries help in their function?

Their thin walls allow nutrients and oxygen to flow out and waste to get in easily

Their thick walls increase blood pressure

Their elastic fibres help them contract

Which of the following best describes the process of gas exchange in the alveoli?

Oxygen diffuses from the alveoli into the capillaries, and carbon dioxide diffuses from the capillaries into the alveoli.

Oxygen and carbon dioxide are both absorbed by the alveoli.

Carbon dioxide is converted into oxygen in the alveoli.

Oxygen is only transported by the blood, not exchanged in the alveoli.

Why must the surface of the alveoli be kept moist?

To allow gases to dissolve and diffuse across cell membranes

To prevent the lungs from collapsing

To increase the temperature of the air

How do the respiratory and circulatory systems work together in the body?

The process of diffusion allows both systems to work together at the alveoli and capillaries, oxygenating blood for transport.

The respiratory system pumps blood, and the circulatory system exchanges gases.

The circulatory system digests food, and the respiratory system removes waste.

Both systems are responsible for producing hormones.

Which statement best explains what happens to blood after it passes through the alveoli?

It is oxygenated and travels back to the heart for transport to the body.

It becomes deoxygenated and is sent to the stomach.

What is the main function of the right ventricle?

Pumps deoxygenated blood to the lungs

Pumps oxygenated blood to the body

Receives oxygenated blood from the lungs

Receives deoxygenated blood from the body

Which chamber of the heart has the thickest wall, and why?

Left Ventricle, because it pumps blood through the entire body

Right Atrium, because it receives blood from the body

Left Atrium, because it receives blood from the lungs

Right Ventricle, because it pumps blood to the lungs

What is the role of arteries in the blood pathway?

Carry oxygenated blood away from the heart

Carry deoxygenated blood to the heart

Why are the walls of the atria thinner than those of the ventricles?

Because atria only receive blood, not pump it far

Because atria pump blood to the entire body

Because atria need to withstand high pressure

Because atria exchange gases with the lungs

Explain how blood is oxygenated and circulated through the heart and body, using evidence from the diagram.

Blood enters the right atrium, is pumped to the right ventricle, sent to the lungs for oxygen, returns to the left atrium, moves to the left ventricle, and is pumped through the body.

Blood enters the left atrium, is pumped to the left ventricle, sent to the lungs for oxygen, returns to the right atrium, moves to the right ventricle, and is pumped through the body.

Blood enters the right ventricle, is pumped to the right atrium, sent to the lungs for oxygen, returns to the left ventricle, moves to the left atrium, and is pumped through the body.

Blood enters the left ventricle, is pumped to the left atrium, sent to the lungs for oxygen, returns to the right ventricle, moves to the right atrium, and is pumped through the body.

What is the main function of heart valves?

To open and close in response to differences in blood pressure

Which statement best describes the difference in digestive systems between carnivores and herbivores?

Carnivores have a shorter digestive system and a small cecum.

Carnivores have a longer digestive system and a large cecum.

Herbivores have a shorter digestive system and a small cecum.

Herbivores have sharp, pointed teeth for tearing meat.

Why do herbivores have longer digestive tracts compared to carnivores?

To help break down tough plant material

To allow for faster digestion of meat

To absorb more water from their food

A student claims that the tricuspid valve is found on the left side of the heart. Using your knowledge of heart anatomy, explain whether this statement is correct and justify your answer.

The statement is incorrect because the tricuspid valve is on the right side of the heart.

The statement is correct because the tricuspid valve is on the left side of the heart.

The statement is correct because all valves are on both sides of the heart.

The statement is incorrect because the tricuspid valve is not found in the heart.

Which of the following best explains why herbivores have long digestive tracts?

To absorb nutrients from plant material, which takes longer to digest

To move faster in their environment

To produce more digestive enzymes

What is the main function of the caecum in herbivores?

To digest cellulose with the help of bacteria

Why do carnivores have shorter digestive tracts compared to herbivores?

They can obtain nutrients from meat more quickly

Based on the diagram, which digestive tract is likely to belong to a herbivore?

The one with a longer intestine and larger caecum

The one with a shorter intestine and smaller caecum

Which statement best describes the difference in enzyme presence between herbivores and carnivores?

Herbivores have more amylase in their saliva, while carnivores have more protease in their small intestine.

Carnivores have more amylase in their saliva, while herbivores have more protease in their small intestine.

Both have equal amounts of all enzymes.

Carnivores have more lactase in their saliva, while herbivores have more lipase in their small intestine.

Where is protease produced in the human body?

Stomach, pancreas, and small intestine

What is the main function of lipase in the digestive system?

Breaks down fat into lipid molecules

Breaks down carbohydrates to smaller sugars

Breaks down protein into amino acids

Breaks down vitamins into minerals

In which parts of the digestive system does amylase work?

Mouth, stomach, and small intestine

Small intestine and large intestine

Explain why the pancreas is important for digestion based on the enzymes it produces.

It produces enzymes that break down carbohydrates, proteins, and fats.

It produces only amylase, which breaks down carbohydrates.

It only helps in the absorption of nutrients.

It produces bile for fat digestion.

Blood Vessels and Circulatory System Quiz

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Blood Vessels and Circulatory System Quiz

Quiz

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Science

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8th Grade

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Practice Problem

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Medium

Used 8+ times

FREE Resource

To prevent blood from flowing backwards

To increase blood pressure

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which vessel carries oxygenated blood under pressure away from the heart to the whole body?

Arteries

Veins

Capillaries

Venules

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Blood Vessels and Circulatory System Quiz

39 questions

Which type of blood vessel has strong, thick walls that allow high pressure blood to flow through?

What is the main function of valves in veins?

Which blood vessel is only one cell thick and allows nutrients and oxygen to flow out easily?

Why are arteries able to expand and contract with each heartbeat?

Which of the following best explains why veins are not as thick and strong as arteries?

What is the primary role of capillaries in the circulatory system?

Which vessel carries oxygenated blood under pressure away from the heart to the whole body?

How do the walls of capillaries help in their function?

Which organs are protected by the rib cage and are responsible for breathing in humans?

What is the main function of the alveoli in the respiratory system?

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