Crolancia Secondary School
Grade 12 Exercise Science – University
Name: ____________________
Date: ____________________
2.
Which mechanism is responsible for bringing blood back to the lungs and thorax? a.
Respiratory pump b.
Muscle pump c.
Gravity d.
Cardiac pump
3.
Cardiac output is equal to which of the following? a.
Heart rate x breathing rate b.
Heart rate x stroke volume c.
Resting heart rate d.
Ventricular systole
4.
Which of the following blood vessels carries deoxygenated blood? a.
Pulmonary vein b.
Coronary arteries c.
Aorta d.
Pulmonary artery
5.
The mitral valve is located between the a.
Right ventricle and pulmonary artery b.
Left ventricle and aorta c.
Left atrium and left ventricle d.
Right atrium and right ventricle
6.
The respiratory zone is composed of the a.
Pharynx, trachea and respiratory bronchioles b.
Mouth, nose, bronchi, and alveolar sacs c.
Trachea, bronchi, bronchioles and alveolar ducts d.
Respiratory bronchioles alveolar ducts and alveolar sacs

7.
Which phase does the QRS complex represent on an electrocardiogram? a.
Ventricular depolarization b.
Atrial depolarization c.
Ventricular polarization d.
All of the above
8.
Which of the following remains unaffected with respect to blood distribution during exercise? a.
The brain b.
The digestive system c.
Skeletal system d.
Skin
Short Answer Questions
Briefly answer the following questions in the space provided:
1.
What are the three mechanisms that assist in venous return? (3 marks)
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2.
Describe the difference between arteries and veins? (2 marks)
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3.
What are some of the components of blood? (3 marks)
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4.
What is hypertension? (2 marks)
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5.
What are the distinguishing characteristics of an elite athlete’s heart? (3 marks)
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6.
What does a-vO
2
represent? (2 marks)
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7.
Why are active recovery methods more beneficial with respect to anaerobic lactic training? (3 marks)
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Essay Question
On a separate sheet of paper, develop a 100-word response to one of the following questions.
(20 marks)
1.
Describe the phenomenon known as cardiovascular drift that occurs during prolonged exercise.
2.
Describe several risk factors that may lead to coronary heart disease.
3.
Outline the pathway of an oxygenated molecule from external respiration to a working quadriceps muscle and the pathway of a carbon dioxide molecule from the quadriceps to external respiration.