Exam (elaborations)
LIFE SCIENCES TEST HEART QUESTIONS & MEMO
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Test on the structure of a heart and functions of internal organelles
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LIFE SCIENCES 2018TEST
UNIT 1: TRANSPORT SYSTEMS IN ANIMALS
SURNAME:__________MEMO____________________ STUDENT NR. ___________________
Question 1 [10]
Choose the alternative that best completes the statement or answers the question. Only encircle the
correct letter.
1.1 Valves in the veins act to___________
A. lower blood pressure.
B. keep blood flowing in one direction.
C. pump blood from and to the heart.
D. trap foreign particles.
1.2 The blood in the right atrium is______
A. derived from the Vena Cava.
B. pumped into the left ventricle.
C. pumped into the pulmonary artery.
D. derived from the pulmonary veins.
1.3 The main advantage of a double circulation system over a single circulation system is
that_____
A. the two halves of the heart share the work involved.
B. the oxygenated blood is kept separate from the deoxygenated blood.
C. the blood returns to the heart more frequently.
D. the blood can be circulated through the heart at a higher pressure than through the
gaseous exchange system.
1.4 Which of the following is true of the rate of contraction of the human heart? It_____
A. tends to increase during exertion.
B. is about 150 times per minute.
C. is about 50 times per minute.
D. tends to decrease during exertion.
1.5 Select the incorrect statement from the following:____
A. Arteries have thicker walls than veins.
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, LIFE SCIENCES 2018
B. Arteries branch into smaller arterioles.
C. Arterioles branch into smaller capillaries.
D. Venules join to form arteries.
1.6 In the pulmonary circuit, the ____ half of the heart pumps ____ blood to the capillaries
inside the lungs, and ______ blood flows back to the heart.
A. Left; oxygenated; deoxygenated.
B. Right; oxygenated; deoxygenated.
C. Right; deoxygenated; oxygenated.
D. Left; deoxygenated; oxygenated.
1.7 Which of the following statements is not true of the action of the heart?
A. When the heart is in diastole, blood is forced through the arteries.
B. Stimulation of the pacemaker of the heart will increase the heart-rate.
C. When the ventricles are in systole, the atrio-ventricular valves are closed.
D. The heart rate is determined by the rate of discharge of the sino-atrial node.
1.8 The diagram below shows a longitudinal section of a vein. Which of the following best
describes the direction in which blood flows? From_____.
A. 1 – 2 and 2-3
B. 3-2 and 2-1
C. 2-1 and 2-3
D. 1-2 and 3-2
1.9 Which of the following is found in veins, arteries and capillaries?
A. Connective tissue
B. Muscle fibres
C. Elastic fibres
D. Endothelium
1.10 The difference between blood in the pulmonary vein and that in all other veins in the human
body, is that it ______
A. Has a higher oxygen content.
B. Has a higher carbon dioxide content.
C. Is flowing away from the heart.
D. Is flowing towards the heart.
Question 2 [8]
Give the correct biological term for each of the following statements
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