U3 B1-3 practice test

You see an image that shows different blood vessels in the human body.

One of the blood vessels has a blue color.

What does this color mean? And can you tell if this is a vein or artery?

• Blood is deoxygenated and its a vein

• Blood is deoxygenated and it can be either vein or artery.

• Blood is oxygenated and it's an artery

• Blood is oxygenated and it can be either artery or vein.

Answer explanation

Most veins are deoxygenated, but the pulmonary artery (flows to the lungs) is also deoxygenated.

Which of the 4 'parts' of the blood contain a nucleus?

• white blood cells

• red blood cells

• white and red blood cells

• white and red blood cells and platelets.

The heart is made up of 2 halves.

Which of these halves contains oxygenated blood?

• right atrium and ventricle

• left atrium and ventricle

• right atrium and left atrium

• right ventricle and left ventricle

Answer explanation

Left side of the hart is oxygenated, because the systemic circulation needs oxygen to give to the organs.

Draw arrows showing the blood flow in this picture of the heart

Answer explanation

Arrows should be going from atria to ventricles.

Blood flows into the heart through veins on the atria.

Blood leaves the heart through ateries that are attached to the ventricles

Blood clotting is a function mainly performed by platelets. But the blood plasma also helps! It contains the substance (a)   that also helps blood clot.

Which of these 'parts' of the blood can leave a capillary and go into an organ?

• white blood cells and blood plasma

• red blood cells and blood plasma

• red-, white blood cells and blood plasma

• All parts of the blood.

Answer explanation

White blood cells can change their shape, this enables them to go through the cells in the wall of a capillary.

Blood plasma is a fluid, this enables it to flow through the cells in the wall of a capillary.

The other parts are too big, and don't fit between the cells in the wall.

The following text describes the journey of a red blood cell:

I begin in the heart and leave it by using the aorta. After a while, I enter a muscle and give it some oxygen. Afterwards, I go back to the heart using the vena cava.

What part of the circulation did this blood cell go through?

The (a)   circulation

The image shows a simplified version of the heart.

Which of these letters shows the right ventricle?

• A

• B

• C

• D

Answer explanation

Right and left are always switched in pictures of the heart!

Blood enters in the atria

Blood leaves in the ventricles

The image shows a simplified version of the heart.

Which of these numbers shows the vena cava?

• 1

• 2

• 3

• 4

Answer explanation

Right and left are always switched in pictures of the heart!

Vena cava is a vein so goes to the heart.

The image shows a simplified version of the heart.

Which of these numbers are blood vessels belonging to the pulmonary circulation?

• 1 and 2

• 2 and 3

• 3 and 4

• 1 and 4

Answer explanation

Right and left are always switched in pictures of the heart!

Vena cava is a vein so goes to the heart.