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Which of the following cartilages is largest?

A.

Corniculate cartilage

B.

Epiglottic cartilage

C.

Thyroid cartilage

D.

Cricoid cartilage

E.

Arytenoid cartilage

Answer and Explanation

The Correct Answer is C

A. Corniculate cartilage: Small horn-shaped cartilages that sit on top of the arytenoid cartilages; not the largest.
B. Epiglottic cartilage: Leaf-shaped cartilage that covers the glottis during swallowing; important but smaller than the thyroid cartilage.
C. Thyroid cartilage: This is the largest laryngeal cartilage; it forms the laryngeal prominence (Adam’s apple).
D. Cricoid cartilage: Ring-shaped and located below the thyroid cartilage; it is smaller than the thyroid cartilage but thicker posteriorly.
E. Arytenoid cartilage: Pyramid-shaped cartilages involved in vocal cord movement; smaller in size.


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Related Questions

Correct Answer is C

Explanation

A. Telomeres are cytoplasmic enzymes involved in senescence:
Telomeres are not enzymes and are not located in the cytoplasm. They are DNA structures found at the ends of chromosomes.

B. Telomeres are antioxidants that slow the progress of senescence:
Telomeres are not antioxidants; instead, they shorten with each cell division and are associated with the aging process.

C. Telomeres are DNA segments at each end of a chromosome:
Telomeres are repetitive nucleotide sequences (TTAGGG in humans) that protect chromosome ends from deterioration or fusion with neighboring chromosomes.

D. Telomeres are proteins that cap the ends of the chromosomes:
While telomere-associated proteins (like shelterin) exist, telomeres themselves are DNA sequences, not proteins.

E. Telomeres are motor molecules that guide embryonic cells to the right destinations:
Telomeres do not have a role in cell migration or embryonic development navigation.

Correct Answer is B

Explanation

A. It participates in muscle contraction: Calcium binds to troponin, enabling contraction.
B. It is a significant component of nucleic acids: Calcium is not a structural part of DNA or RNA; phosphate is.
C. They serve as second messengers: Calcium ions act as second messengers in various signaling pathways.
D. It activates exocytosis: Calcium triggers neurotransmitter and hormone release by promoting vesicle fusion.
E. It is important in blood clotting: Calcium is essential for several steps in the coagulation cascade.

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