Wgu anatomy and physiology with lab
See correct answers immediately with detailed explanations after each question.
Answer all questions, then review your results with feedback at the end.
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Below are sample questions from this exam to help you understand the content and format.
Q1: From deoxygenated blood entering the heart to oxygenated blood leaving the heart, in which order will the blood pass through the following valves?
Answer Choices:
✨ Blood enters the heart as deoxygenated blood through the right atrium and passes first through the tricuspid valve into the right ventricle.
✨ From the right ventricle, it is pumped through the pulmonary valve into the pulmonary arteries and toward the lungs for oxygenation.
✨ Oxygenated blood then returns to the left atrium and passes through the bicuspid (mitral) valve into the left ventricle.
✨ Finally, it is ejected through the aortic valve into the systemic circulation.
✨ This sequence ensures proper one-way blood flow through the heart and into the body.
Q2: What is the correct order of deoxygenated blood flow as it enters and then exits the heart?
Answer Choices:
✏️ Deoxygenated blood enters the right atrium of the heart via the superior and inferior vena cava.
✏️ It then passes through the tricuspid valve into the right ventricle.
✏️ From the right ventricle, blood is pumped through the pulmonary valve into the pulmonary arteries.
✏️ These arteries carry the blood to the lungs for gas exchange and oxygenation.
✏️ This pathway confirms that venous blood enters via the venae cavae and exits the heart through the pulmonary arteries.
Q3: Which artery provides the blood to the distal segments of the large intestine and rectum?
Answer Choices:
🔺 The inferior mesenteric artery supplies blood to the distal segments of the large intestine and the rectum.
🔺 It branches from the abdominal aorta and provides oxygenated blood to the descending colon, sigmoid colon, and rectum.
🔺 This is essential for maintaining the metabolic needs of these portions of the digestive tract.
🔺 The inferior phrenic arteries supply the diaphragm, the gonadal arteries supply the reproductive organs, and the renal arteries supply the kidneys.
🔺 Thus, only the inferior mesenteric artery is responsible for perfusion of the lower digestive tract.
Q4: What causes a higher stroke volume?
Answer Choices:
✍️ Stroke volume is the amount of blood ejected by the ventricle during each heartbeat.
✍️ Preload refers to the degree of stretch of the cardiac muscle fibers at the end of diastole.
✍️ When preload increases, ventricular filling rises, leading to stronger contractions by the Frank-Starling mechanism.
✍️ This results in a higher stroke volume because the heart pumps out more blood.
✍️ Increased afterload or decreased contractility would lower stroke volume, not increase it.
Q5: Which event takes place during atrial diastole?
Answer Choices:
🢐 During atrial diastole, both the right atrium and the left atrium are in a relaxed state.
🢐 This relaxation allows blood to flow into the atria from the vena cavae on the right side and the pulmonary veins on the left side.
🢐 Atrial diastole is essential for ensuring that the atria are filled and ready for the next contraction (atrial systole).
🢐 This phase occurs while the ventricles are contracting during ventricular systole.
🢐 Thus, both atria fill with blood during atrial diastole, preparing for the next cardiac cycle.
SOCIOLOGY
