Name the period of the heart cycle when the cardiac muscle of the heart is:
1 - Leaving Cert Biology - Question 17(d) - 2022
Question 17(d)
Name the period of the heart cycle when the cardiac muscle of the heart is:
1. Contracting: Systole
2. Not contracting: Diastole
In which diagram, X or Y or Z, are ... show full transcript
Worked Solution & Example Answer:Name the period of the heart cycle when the cardiac muscle of the heart is:
1 - Leaving Cert Biology - Question 17(d) - 2022
Step 1
Name the period of the heart cycle when the cardiac muscle of the heart is:
1. Contracting
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Answer
The period of the heart cycle when the cardiac muscle is contracting is known as Systole.
Step 2
2. Not contracting
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Answer
The period when the heart muscle is not contracting is referred to as Diastole.
Step 3
In which diagram, X or Y or Z, are the ventricles contracting?
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Answer
The ventricles are contracting in diagram Z.
Step 4
Explain how you know the ventricles are contracting.
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Answer
In diagram Z, the ventricles' volumes are reduced, indicating that blood is being pumped out into the arteries. Furthermore, the semilunar valves would be open while the AV valves are closed during this contraction.
Step 5
State the location of the sinoatrial (SA) node in the heart.
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Answer
The sinoatrial (SA) node is located in the wall of the right atrium.
Step 6
There is a two-circuit circulatory system in humans. Name the circuit to which:
1. The right ventricle pumps blood.
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The right ventricle pumps blood into the Pulmonary circuit.
Step 7
2. The left ventricle pumps blood.
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Answer
The left ventricle pumps blood into the Systemic circuit.
Step 8
What causes these sounds?
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Answer
The sounds that can be heard during a heartbeat are caused by the closing of the valves within the heart.
Step 9
What is the function of the coronary (cardiac) artery?
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The function of the coronary artery is to supply the heart (cardiac) muscle (or tissue or cells) with blood.
Step 10
Describe the effect on the circulatory system of either one of the following:
Smoking
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Answer
Smoking typically leads to an increase in heart rate or increase in blood pressure, or may have other valid effects on the circulatory system.
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