Mass Transport: Heart & Blood — A-Level Biology Revision
Revise Mass Transport: Heart & Blood for A-Level Biology. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP.
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Go to Gas ExchangeWhat is Mass Transport: Heart & Blood?
Mass transport is the movement of substances over long distances in multicellular organisms, via a transport system. In mammals, the circulatory system, consisting of the heart, blood vessels, and blood, is responsible for transporting oxygen, nutrients, hormones, and waste products. The double circulatory system ensures that blood is pumped to the lungs to be oxygenated before being circulated to the rest of the body.
Board notes: The structure and function of the heart, blood vessels, and the process of blood clotting are covered by all A-Level Biology boards (AQA, Edexcel, OCR). The interpretation of ECGs (electrocardiograms) and the formation of tissue fluid are also key areas, with some variation in the level of detail required.
Step-by-step explanationWorked example
To calculate cardiac output, you use the formula: Cardiac Output = Heart Rate × Stroke Volume. If a person has a heart rate of 70 beats per minute and a stroke volume of 75 ml per beat, their cardiac output is 70 × 75 = 5250 ml/min or 5.25 litres/min.
Mini lesson for Mass Transport: Heart & Blood
1. Understand the core idea
Mass transport is the movement of substances over long distances in multicellular organisms, via a transport system. In mammals, the circulatory system, consisting of the heart, blood vessels, and blood, is responsible for transporting oxygen, nutrients, hormones, and waste products.
Can you explain Mass Transport: Heart & Blood without copying the notes?
2. Turn it into marks
To calculate cardiac output, you use the formula: Cardiac Output = Heart Rate × Stroke Volume. If a person has a heart rate of 70 beats per minute and a stroke volume of 75 ml per beat, their cardiac output is 70 × 75 = 5250 ml/min or 5.
Underline the method, evidence, or command-word move that would earn credit in A-Level Exchange & Transport.
3. Fix the likely mark leak
Watch for this mistake: Confusing the roles of arteries, veins, and capillaries. Arteries carry high-pressure blood away from the heart, have thick muscular walls, and a narrow lumen. Veins carry low-pressure blood towards the heart, have thinner walls, a wider lumen, and valves to prevent backflow. Capillaries are the site of exchange and have walls that are one cell thick.
Write one correction rule before doing another practice question.
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Mass Transport: Heart & Blood practice questions
These are original StudyVector questions for revision practice. They are not official exam-board questions.
Question 1
In one A-Level sentence, explain what Mass Transport: Heart & Blood is testing.
Answer: Mass transport is the movement of substances over long distances in multicellular organisms, via a transport system. In mammals, the circulatory system, consisting of the heart, blood vessels, and blood, is responsible for transporting oxygen, nutrients, hormones, and waste products.
Mark focus: Precise definition and topic focus.
Question 2
A Mass Transport: Heart & Blood question uses an unfamiliar context. What should the answer do before adding detail?
Answer: It should name the process, variable, equation, particle model, or evidence being tested, then explain the result using precise scientific vocabulary.
Mark focus: Method selection and command-word control.
Question 3
A student makes this mistake: "Confusing the roles of arteries, veins, and capillaries. Arteries carry high-pressure blood away from the heart, have thick muscular walls, and a narrow lumen. Veins carry low-pressure blood towards the heart, have thinner walls, a wider lumen, and valves to prevent backflow. Capillaries are the site of exchange and have walls that are one cell thick." What should their next repair task be?
Answer: Do one Mass Transport: Heart & Blood question and review the mistake type.
Mark focus: Error correction and next-step practice.
Mass Transport: Heart & Blood flashcards
Core idea
What is the main idea in Mass Transport: Heart & Blood?
Mass transport is the movement of substances over long distances in multicellular organisms, via a transport system. In mammals, the circulatory system, consisting of the heart, blood vessels, and blood, is responsibl...
Common mistake
What mistake should you avoid in Mass Transport: Heart & Blood?
Confusing the roles of arteries, veins, and capillaries. Arteries carry high-pressure blood away from the heart, have thick muscular walls, and a narrow lumen.
Practice
What is one useful practice task for Mass Transport: Heart & Blood?
Answer one Mass Transport: Heart & Blood question and review the mistake type.
Exam board
How should you use board notes for Mass Transport: Heart & Blood?
The structure and function of the heart, blood vessels, and the process of blood clotting are covered by all A-Level Biology boards (AQA, Edexcel, OCR). The interpretation of ECGs (electrocardiograms) and the formatio...
Common mistakes
- 1Confusing the roles of arteries, veins, and capillaries. Arteries carry high-pressure blood away from the heart, have thick muscular walls, and a narrow lumen. Veins carry low-pressure blood towards the heart, have thinner walls, a wider lumen, and valves to prevent backflow. Capillaries are the site of exchange and have walls that are one cell thick.
- 2Not understanding the cardiac cycle. The cardiac cycle consists of systole (contraction) and diastole (relaxation) of the atria and ventricles. The sequence is atrial systole, ventricular systole, and then diastole of both.
- 3Forgetting the role of tissue fluid. Tissue fluid is the fluid that surrounds the cells in tissues. It is formed from blood plasma that leaks from capillaries and is where the exchange of substances between the blood and cells takes place.
Mass Transport: Heart & Blood exam questions
Exam-style questions for Mass Transport: Heart & Blood with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP specifications.
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Step-by-step method
Step-by-step explanation
4 steps · Worked method for Mass Transport: Heart & Blood
Core concept
Mass transport is the movement of substances over long distances in multicellular organisms, via a transport system. In mammals, the circulatory system, consisting of the heart, blood vessels, and blo…
Frequently asked questions
What is the function of the coronary arteries?
The coronary arteries are the blood vessels that supply the heart muscle itself with oxygenated blood. Blockage of these arteries can lead to a heart attack.
How is blood pressure measured?
Blood pressure is measured in millimetres of mercury (mmHg) and is given as two figures: systolic pressure (the pressure when the heart beats) over diastolic pressure (the pressure when the heart rests between beats).