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What is the name of the outer layer of the lungs that connects to the thoracic wall?

A.

Parietal pleura

B.

Diaphragm

C.

Pleural cavity

D.

Visceral pleura

Answer and Explanation

The Correct Answer is A

A. Parietal pleura: The parietal pleura is the outer layer of the pleura that lines the thoracic cavity and is connected to the thoracic wall.

B. Diaphragm: The diaphragm is the main muscle involved in respiration, but it is not part of the lung's outer layer.

C. Pleural cavity: The pleural cavity is the space between the parietal and visceral pleura, filled with pleural fluid to reduce friction.

D. Visceral pleura: The visceral pleura is the inner layer that covers the lungs but does not connect to the thoracic wall.


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Related Questions

Correct Answer is B

Explanation

A. Brain and aortic arch: The aortic arch contains peripheral chemoreceptors, but the central chemoreceptor is in the medulla.

B. Medulla of the brain stem: Central chemoreceptors located in the medulla monitor the levels of carbon dioxide (via pH changes) in the cerebrospinal fluid to regulate breathing.

C. Carotid arteries and brain stem: The carotid arteries contain peripheral chemoreceptors, but not central chemoreceptors.

D. Carotid arteries and aortic arch: These locations house peripheral chemoreceptors, not central ones.

Correct Answer is A

Explanation

A. Tunica vaginalis, tunica albuginea, seminiferous tubules: The tunica vaginalis is the outer protective layer, followed by the tunica albuginea (a tough fibrous layer), and then the seminiferous tubules, where sperm production occurs.

B. Tunica vaginalis, seminiferous tubules, tunica albuginea: The seminiferous tubules are deeper than the tunica albuginea, making this order incorrect.

C. Tunica albuginea, tunica vaginalis, seminiferous tubules: This reverses the outer layers, as the tunica vaginalis is superficial to the tunica albuginea.

D. Seminiferous tubules, tunica vaginalis, tunica albuginea: This order is incorrect, as the tunica vaginalis and tunica albuginea are external to the seminiferous tubules.

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