Heart：练习题

Which method is commonly used to monitor heart activity by measuring electrical impulses?

During vigorous exercise, the heart rate increases significantly. What is the main purpose of this physiological response?

Which statement best explains the physiological advantage of the double circulation system found in mammals?

Which chamber of the heart pumps deoxygenated blood to the lungs?

Why is the muscular wall of the left ventricle thicker than that of the right ventricle?

Identify one common method used to monitor the activity of the heart.

Explain why the muscle wall of the left ventricle in the mammalian heart is significantly thicker than that of the right ventricle.

Name the two main blood vessels that carry blood away from the heart to the body and from the body back to the heart.

(a) Describe the path of blood through the human heart, starting from the vena cava. Name the four chambers and the major blood vessels involved, indicating whether the blood is oxygenated or deoxygenated at each stage.

(b) Explain why the muscle wall of the left ventricle is significantly thicker than that of the right ventricle, and also thicker than the atrial walls.

(c) Outline the function of the one-way valves in the heart, specifically mentioning their locations and how they ensure unidirectional blood flow.

(d) Describe the role of coronary arteries in the mammalian heart.