Which cartilage covers the opening of the trachea?
Epiglottis
Arytenoids
Thyroid
Cricoid
The Correct Answer is A
A. Epiglottis: The epiglottis is a leaf-shaped flap of cartilage located at the root of the tongue. It covers the opening of the trachea during swallowing to prevent food and liquids from entering the airway. This function is crucial for protecting the respiratory tract from aspiration.
B. Arytenoids: The arytenoid cartilages are small, paired cartilages that are involved in the movement and tension of the vocal cords but do not cover the opening of the trachea.
C. Thyroid: The thyroid cartilage is the largest cartilage of the larynx and forms the Adam's apple but does not cover the trachea.
D. Cricoid: The cricoid cartilage is located below the thyroid cartilage and is the only complete ring of cartilage around the trachea. While it provides support, it does not cover the opening of the trachea.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Gametes are only found in males: This statement is incorrect; gametes (sperm and eggs) are found in both males and females.
B. Gametes have double the chromosomes: This is incorrect; gametes are haploid (having half the number of chromosomes), while somatic cells are diploid (having two sets of chromosomes).
C. Gametes do not go through cell division: Gametes are produced through meiosis, which is a type of cell division.
D. Gametes go through meiosis: Gametes are produced through meiosis, a specialized form of cell division that reduces the chromosome number by half, allowing for sexual reproduction.
Correct Answer is A
Explanation
A. Inferior mesenteric artery: This artery is responsible for supplying blood to the distal part of the large intestine, including the descending colon, sigmoid colon, and rectum.
B. Inferior phrenic artery: This artery supplies blood to the diaphragm, not the large intestine or rectum.
C. Gonadal artery: The gonadal arteries supply blood to the reproductive organs, such as the ovaries or testes, not the large intestine.
D. Renal artery: The renal arteries supply blood to the kidneys and are unrelated to the blood supply of the large intestine or rectum.
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