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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 C

Explanation

A. To ensure that the uterus is securely connected to the supporting ligaments: This is not the primary function of the middle layer (myometrium); rather, the supporting ligaments provide stability to the uterus.

B. To allow the uterus to shed tissue during menstruation: This is primarily the function of the endometrium, the inner layer of the uterine wall.

C. To allow the uterus to contract during childbirth to expel the fetus: The middle layer, known as the myometrium, is composed of smooth muscle that contracts during labor to help expel the fetus.

D. To provide the uterus with adequate space to grow a fetus: While the uterine structure allows for fetal growth, the myometrium’s primary role is in contractions rather than providing space.

Correct Answer is A

Explanation

A. Glomerulus: The glomerulus is a high-pressure capillary bed in the nephron where filtration of blood occurs.

B. Bowman's capsule: This is the cup-shaped structure surrounding the glomerulus, not a capillary bed.

C. Vasa recta: These are capillaries surrounding the loop of Henle, involved in the reabsorption process, not filtration.

D. Macula densa: This is a group of specialized cells in the distal convoluted tubule that sense sodium concentration and affect glomerular filtration rate, but it is not a capillary bed.

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