The lungs have a total of five
segmental bronchi
choanae
laryngeal cartilages
lobes
tracheal cartilages
The Correct Answer is D
A. Segmental bronchi: There are more than five segmental (tertiary) bronchi; each lung has multiple segments.
B. Choanae: These are posterior nasal apertures, not part of the lungs.
C. Laryngeal cartilages: There are nine laryngeal cartilages in total, not five in the lungs.
D. Lobes: The right lung has three lobes (superior, middle, inferior), and the left lung has two lobes-totaling five.
E. Tracheal cartilages: The trachea has multiple C-shaped cartilaginous rings, not five.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. To the endometrium: The embryo implants into the endometrial lining of the uterus, which thickens in preparation for implantation.
B. To the perimetrium: This is the outer serosal layer of the uterus; not involved in implantation.
C. To the myometrium: This is the muscular layer of the uterus; the embryo does not implant here.
D. To the lining of the uterine tube: Implantation here is abnormal and leads to an ectopic pregnancy.
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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