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From deoxygenated blood entering the heart to oxygenated blood leaving the heart, in which order will the blood pass through the following valves?

A.

Pulmonary valve

B.

Aortic valve

C.

Tricuspid valve

D.

Bicuspid valve

Answer and Explanation

The Correct Answer is C, A, D, B

  • Deoxygenated blood from the body enters the right atrium, passes through the tricuspid valve into the right ventricle.
  • From the right ventricle, blood moves through the pulmonary valve into the pulmonary arteries and goes to the lungs for oxygenation.
  • Oxygenated blood returns to the left atrium and passes through the bicuspid (mitral) valve into the left ventricle.
  • Finally, the left ventricle pumps oxygenated blood through the aortic valve into the aorta for distribution to the body.


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Related Questions

Correct Answer is B

Explanation

A. Uvula: The uvula is a small fleshy extension that helps with speech and prevents food from entering the nasal cavity but is not a lymphoid structure.

B. Palatine tonsils: The palatine tonsils are clusters of lymphoid tissue located at the back of the throat, protecting the pharynx from infections.

C. Hard palate: The hard palate forms the roof of the mouth and aids in chewing but has no immune function.

D. Esophageal sphincter: This is a muscular ring at the junction of the esophagus and stomach, not involved in immune defense.

Correct Answer is C

Explanation

A. Calcium: Calcium reabsorption primarily occurs in the distal convoluted tubule, not the loop of Henle.

B. Drugs: Drug secretion mainly happens in the proximal convoluted tubule.

C. Urea: Urea is secreted by the loop of Henle, especially in the thin descending limb, as part of the concentration of urine.

D. Bicarbonate ions: Bicarbonate is reabsorbed mainly in the proximal convoluted tubule, not secreted by the loop of Henle.

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