Which of the following statement/s is/are true regarding the chambers of the heart? A. The myocardium forms the walls of the four chambers of the heart. B. The endocardium lines the chambers and covers the valves of the heart C. The endocardium is lined with simple squamous epithelium that is very smooth and prevents abnormal clotting. D. The ventricles pump blood into arteries. E. All statements are true.
Multiple Choice. Answer the following questions.
1. Which of the following statement/s is/are true regarding the chambers of the heart?
A. The myocardium forms the walls of the four chambers of the heart.
B. The endocardium lines the chambers and covers the valves of the heart
C. The endocardium is lined with simple squamous epithelium that is very smooth and prevents abnormal clotting.
D. The ventricles pump blood into arteries.
E. All statements are true.
2. Which of the following statement/s is/are true about veins?
A. Inner layer is composed of simple squamous epithelial tissue.
B. Middle layer are composed of smooth muscle and elastic connective tissue which contributes to maintenance of diastolic blood pressure.
C. Outer layer is composed of fibrous connective tissue to prevent rupture.
D. All statements are not true.
E. All statements are true.
3. Which of the following statement/s is/are not true about regulation of heart rate?
A. The brainstem contains the cardiac centers which are the accelerator center and the inhibitory center. (medulla)
B. Sympathetic impulses to the heart increase rate and force of contraction.
C. Parasympathetic impulses from cranial nerve X to the heart causes reduction in the heart rate.
D. The cranial nerve IX is motor for the carotid receptors. (sensory)
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