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Where are the vocal folds located?"

A.

Pharynx

B.

Epiglottis

C.

Trachea

D.

Larynx

Answer and Explanation

The Correct Answer is D

A. Pharynx: The pharynx is a part of the throat, but the vocal folds are not located here.

B. Epiglottis: The epiglottis is a flap of tissue that prevents food from entering the trachea, but it is not where the vocal folds are located.

C. Trachea: The trachea is the windpipe, but the vocal folds are not present here.

D. Larynx: The vocal folds (or vocal cords) are located in the larynx (voice box), which is responsible for sound production.


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Related Questions

Correct Answer is A

Explanation

A. Rugae: The rugae are folds in the stomach lining that expand when the stomach fills with food, increasing surface area for digestion.

B. Microvilli: Microvilli increase surface area in the small intestine, not the stomach.

C. Peritoneum: The peritoneum is a membrane surrounding the abdominal cavity, not involved in surface area expansion of the stomach.

D. Muscularis: The muscularis is the muscle layer responsible for stomach contractions but does not increase surface area.

Correct Answer is A

Explanation

A. It decreases the heart rate.: Acetylcholine is a neurotransmitter that binds to receptors in the heart, leading to a decrease in heart rate by activating the parasympathetic nervous system.

B. It increases the heart rate.: Acetylcholine does not increase heart rate; that function is primarily associated with norepinephrine, which is part of the sympathetic nervous system.

C. It increases the rate of spontaneous depolarization: Acetylcholine actually decreases the rate of spontaneous depolarization in pacemaker cells of the heart, leading to a slower heart rate.

D. It shortens the time for repolarization.: Acetylcholine does not shorten repolarization; it increases the duration of repolarization due to the hyperpolarizing effects on the heart cells.

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