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Circulatory System: Introduction and Anatomy

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Circulatory System: Introduction and Anatomy

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Questions and Answers

Which of the following is NOT a component of the circulatory system?

Heart

Blood vessels

Lymphatic system (correct)

Lungs

What is the primary function of the capillaries in the circulatory system?

To carry oxygenated blood away from the heart

To facilitate the exchange of nutrients, gases, and waste products between the blood and tissues (correct)

To pump blood through the body

To carry deoxygenated blood towards the heart

What is the purpose of the semilunar valves in the heart?

To prevent backflow of blood from the ventricles to the atria

To regulate the flow of blood from the heart to the lungs

To control the flow of blood from the heart to the body (correct)

To maintain the pressure gradient necessary for the cardiac cycle

Which of the following is NOT a function of the blood?

Regulation of body temperature and pH balance Signup and view all the answers

What is the purpose of the cardiac cycle's diastolic phase?

To allow the ventricles to fill with blood Signup and view all the answers

Which of the following is NOT a component of the neural regulation of the circulatory system?

Renin-angiotensin system Signup and view all the answers

Which of the following conditions is NOT directly related to the circulatory system?

Emphysema Signup and view all the answers

What is the primary function of aldosterone in the regulation of the circulatory system?

Regulating sodium and water balance Signup and view all the answers

What is the primary cause of a heart attack?

Rupture of an atherosclerotic plaque Signup and view all the answers

Which of the following lifestyle factors is NOT directly mentioned as playing a crucial role in maintaining a healthy circulatory system?

Smoking cessation Signup and view all the answers