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Chapter 8: Problem 4

Which ch amber initially receives blood from the systemic circuit? a. left atrium b. left ventricle c. right atrium d. right ventricle

Short Answer

Expert verified
Answer: c. right atrium

Step by step solution

01

Recall the basic structure of the heart

The human heart is divided into four chambers: right atrium, right ventricle, left atrium, and left ventricle.
02

Understand the flow of blood through the heart

Blood flows through the heart in the following sequence: 1. Deoxygenated blood from the body returns to the heart through veins and enters the right atrium. 2. Blood is then pumped from the right atrium into the right ventricle. 3. The right ventricle then pumps the blood to the lungs, where it picks up oxygen and releases carbon dioxide. 4. Oxygen-rich blood returns from the lungs to the heart, entering the left atrium. 5. Blood flows from the left atrium into the left ventricle. 6. The left ventricle pumps the oxygenated blood out to the rest of the body through arteries.
03

Determine the chamber that receives blood from the systemic circuit

Since deoxygenated blood coming from the systemic circuit (the body) first enters the heart in the right atrium, the correct answer is: c. right atrium

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Most popular questions from this chapter

Most blood enters the ventricle during ________. a. atrial systole b. atrial diastole c. ventricular systole d. isovolumic contraction

Which of the following lists the valves in the order through which the blood flows from the vena cava through the heart? a. tricuspid, pulmonary semilunar, bicuspid, aortic semilunar b. mitral, pulmonary semilunar, bicuspid, aortic semilunar c. aortic semilunar, pulmonary semilunar, tricuspid, bicuspid d. bicuspid, aortic semilunar, tricuspid, pulmonary semilunar

Which of the following is unique to cardiac muscle cells? a. Only cardiac muscle contains a sarcoplasmic reticulum. b. Only cardiac muscle has gap junctions. c. Only cardiac muscle is capable of autorhythmicity d. Only cardiac muscle has a high con centration of mitochondria.

The first heart sound represents which portion of the cardiac cycle? a. atrial systole b. ventricular systole c. closing of the atrioventricular valves d. closing of the semilunar valves

Why is the pressure in the pulmonary circulation lower than in the systemic circulation?
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