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Which of the following structures separates the right and left pleurae?

A.

Intercostal muscles

B.

Pleural cavity

C.

Mediastinum

D.

Diaphragm

Answer and Explanation

The Correct Answer is C

a. Intercostal muscles: Intercostal muscles are located between the ribs and help with breathing movements. They don't separate the pleurae.

b. Pleural cavity: The pleural cavity is the space between the pleura and the lung on each side. There isn't another pleural cavity within this space.

c. Mediastinum: The pleura are two thin membranes that line the lungs and inner chest wall. The mediastinum is the central compartment of the thoracic cavity, containing essential structures like the heart, trachea, esophagus, and major blood vessels. It separates the right and left pleural cavities.

d. Diaphragm: The diaphragm is a dome-shaped muscle separating the thoracic cavity from the abdominal cavity. While it plays a role in respiration, it doesn't directly separate the pleurae


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Related Questions

Correct Answer is A

Explanation

a. 1 to 2 liters: Correct. The average adult typically produces about 1 to 2 liters of urine per day.

b. 3 to 5 liters: This is an unusually high amount of urine production and is not typical for most adults.

c. 5 to 7 liters: This is an excessively high amount of urine production and would usually indicate a medical condition.

d. 2 to 4 liters: This range is slightly higher than average but can still be considered normal under certain conditions such as increased fluid intake or diuretic use.

Correct Answer is D

Explanation

a. The outer tissue layer consisting of renal corpuscles and convoluted tubules: This describes the renal cortex, not the renal pelvis.

b. The inner tissue layer consisting of the loop of Henle and collecting tubules: This describes the renal medulla, not the renal pelvis.

c. The expanded area of a renal tubule that encloses the glomerulus: This describes Bowman's capsule, not the renal pelvis.

d. The cavity where urine flows from the calyces to enter the ureters: Correct. The renal pelvis is the funnel-shaped cavity that collects urine from the calyces and channels it into the ureter.

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