the heart exam Questions with
Verified Answers
Why could the blockage in Figure 1 cause cells in the heart to die? (2) - ANSWERS-less
blood flows through or less blood flows to the heart (muscle / cells / tissue)
-less oxygen (reaches the heart muscle)
Explain how a stent works as a treatment for a person with a blockage in a coronary
artery.(2) - ANSWERS-opens / widens (artery)
- so (more) blood can flow through
Humans have a double circulatory system. Explain what this means. (3) - ANSWERS- 2
loops/circuits joined together.
-first loop the heart pumps blood to the lungs to be oxygenated and then it returns to the
heart.
- second loop the heart pumps blood all around the body to supply the cells so they are
able to exchange substances with blood before returning to the heart.
Describe and explain the differences between the walls of arteries and veins. (2) -
ANSWERS-Arteries -hick walls made of elastic fibres and smooth muscle to withstand
and maintain the high blood pressure generated from the heart.
-The blood pressure is much lower in veins so they have much thinner walls.
which blood vessels will you find valves and what are their purpose? (2) - ANSWERS-
Valves are found in veins.
-They make sure the blood only flows in one direction/ prevent backflow.
what does the heart look like? - ANSWERS
Describe how deoxygenated blood moves through the heart.(3) - ANSWERS-
Deoxygenated blood enters the right atrium via the vena cava.
-The right atrium contracts and pushes it into the right ventricle.
-The right ventricle contracts and pushes it to the lungs to be oxygenated
Explain why the walls of the left ventricle are thicker than the walls of the right ventricle.
(2) - ANSWERS-The left ventricle transports blood all around the body whereas the
right ventricle only transports blood to the lungs.
-The left ventricle needs more muscle to generate a higher blood pressure to push the
blood further.
Verified Answers
Why could the blockage in Figure 1 cause cells in the heart to die? (2) - ANSWERS-less
blood flows through or less blood flows to the heart (muscle / cells / tissue)
-less oxygen (reaches the heart muscle)
Explain how a stent works as a treatment for a person with a blockage in a coronary
artery.(2) - ANSWERS-opens / widens (artery)
- so (more) blood can flow through
Humans have a double circulatory system. Explain what this means. (3) - ANSWERS- 2
loops/circuits joined together.
-first loop the heart pumps blood to the lungs to be oxygenated and then it returns to the
heart.
- second loop the heart pumps blood all around the body to supply the cells so they are
able to exchange substances with blood before returning to the heart.
Describe and explain the differences between the walls of arteries and veins. (2) -
ANSWERS-Arteries -hick walls made of elastic fibres and smooth muscle to withstand
and maintain the high blood pressure generated from the heart.
-The blood pressure is much lower in veins so they have much thinner walls.
which blood vessels will you find valves and what are their purpose? (2) - ANSWERS-
Valves are found in veins.
-They make sure the blood only flows in one direction/ prevent backflow.
what does the heart look like? - ANSWERS
Describe how deoxygenated blood moves through the heart.(3) - ANSWERS-
Deoxygenated blood enters the right atrium via the vena cava.
-The right atrium contracts and pushes it into the right ventricle.
-The right ventricle contracts and pushes it to the lungs to be oxygenated
Explain why the walls of the left ventricle are thicker than the walls of the right ventricle.
(2) - ANSWERS-The left ventricle transports blood all around the body whereas the
right ventricle only transports blood to the lungs.
-The left ventricle needs more muscle to generate a higher blood pressure to push the
blood further.
