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Where are the tonsils located?

A.

Trachea

B.

Esophagus

C.

Pharynx

D.

Larynx

Answer and Explanation

The Correct Answer is C

A. Trachea: The trachea is the airway that leads to the lungs, but it does not contain tonsils.

B. Esophagus: The esophagus is the tube that connects the throat to the stomach, and it does not contain tonsils.

C. Pharynx: The tonsils are located in the pharynx, which is the region of the throat behind the mouth and nasal cavity. They play a role in the immune system by trapping pathogens that enter the body through the mouth and nose.

D. Larynx:  The larynx is the voice box, located below the pharynx, and does not house tonsils.


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Related Questions

Correct Answer is C

Explanation

A. It increases blood pressure, leading to a heart attack or stroke: This is not the primary mechanism of carbon monoxide poisoning.

B. It causes an increase in carbon dioxide, which causes an increase in pH: This is incorrect. Carbon monoxide binds to hemoglobin more tightly than oxygen, not carbon dioxide.

C. It occupies oxygen-binding sites on hemoglobin and decreases the amount of oxygen that reaches the tissues: Carbon monoxide has a high affinity for hemoglobin, leading to reduced oxygen transport in the blood, which can cause tissue hypoxia and death.

D. It causes inflammation within the bronchioles and prevents air from reaching the alveoli: This is incorrect; carbon monoxide poisoning does not work by causing inflammation.

Correct Answer is C

Explanation

A. Aldosterone hormone: Aldosterone affects sodium and potassium reabsorption, increasing water retention indirectly, but it does not directly increase water permeability in the collecting ducts.

B. Atrial natriuretic peptide hormone: This hormone decreases blood volume by inhibiting sodium reabsorption, leading to more water excretion, not reabsorption.

C. Antidiuretic hormone (ADH): ADH increases the permeability of the collecting ducts to water, allowing more water to be reabsorbed into the bloodstream.

D. Parathyroid hormone: This hormone primarily regulates calcium levels, not water permeability.

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