Fill in the Blank
The process of
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A. Oogenesis: Produces 1 mature ovum. During oogenesis the unequal cytokinesis of meiotic divisions creates one large functional ovum and smaller polar bodies.
B. Meiosis: Meiosis is the cell-division mechanism that reduces chromosome number. In spermatogenesis meiosis yields 4 functional sperm, but in oogenesis meiosis (with unequal cytokinesis) yields 1 functional ovum plus polar bodies.
C. Spermatogenesis: Spermatogenesis produces 4 mature sperm from one spermatogonial cell (not ova) -it does not produce mature ova.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Responsible for uterine contractions: The myometrium is the thick middle layer of uterine smooth muscle and is the contractile layer responsible for rhythmic uterine contractions (e.g., labor, Braxton–Hicks) .
B. Primary support for the uterus: Structural support of the uterus is provided mainly by pelvic ligaments and pelvic floor muscles; this is not the primary role of the myometrium.
C. Thickens in response to estrogen: The endometrium (the mucosal lining) thickens cyclically in response to estrogen; the myometrium undergoes hypertrophy in pregnancy but is not the layer described by cyclic thickening of the uterine lining.
D. Covers the exterior portion of the uterus: The outer covering of the uterus is the perimetrium (serosa), not the myometrium.
Correct Answer is A
Explanation
A. Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli: This correctly lists the anatomical pathway air follows from entry to the gas-exchange sites.
B. Nasal cavity, pharynx, trachea, larynx, bronchi, bronchioles, alveoli: This places the trachea before the larynx (incorrect order); the larynx is between the pharynx and trachea.
C. Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli: This incorrectly reverses bronchioles and bronchi -bronchi branch into bronchioles, not the other way around.
D. Nasal cavity, larynx, pharynx, trachea, bronchi, bronchioles, alveoli: This places the larynx before the pharynx (incorrect); air passes through the pharynx first then the larynx.
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