_________ occurs when the external intercostal muscles contract, pulling the ribs up and expanding laterally.
Vital capacity
Expiration
Inspiration
Ventilation
The Correct Answer is C
A. Vital capacity: Vital capacity is a lung-volume measurement (maximum inhale → maximum exhale), not the mechanical action of rib elevation.
B. Expiration: Expiration (quiet) is produced by relaxation and elastic recoil; active rib elevation is not part of expiration.
C. Inspiration: Contraction of the external intercostals (and diaphragm) raises the ribs and expands the thoracic cage, producing inspiration.
D. Ventilation: Ventilation is the overall process of air movement in and out of the lungs; rib elevation specifically describes inspiration rather than the whole process.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D"]
Explanation
A. Secretory phase: The secretory phase is a uterine (endometrial) phase that follows ovulation when the endometrium is prepared for implantation by progesterone-driven secretions
B. Proliferative phase: The proliferative phase is the pre-ovulatory uterine phase in which the endometrium rebuilds under the influence of estrogen.
C. Ovulatory phase: “Ovulatory” refers to ovulation and is classically part of the ovarian cycle (the moment of egg release), not listed as a primary uterine cycle phase.
D. Menses:Menses (menstrual phase) is the shedding of the functional layer of the endometrium and is a primary uterine cycle phase.
E. Luteal phase: The luteal phase is an ovarian cycle phase (post-ovulation, corpus luteum activity). Although it corresponds in time to the uterine secretory phase, “luteal” names the ovarian, not uterine, phase.
Correct Answer is ["B","C","E","F"]
Explanation
A. Liver:Accessory digestive organ (produces bile) but not part of the canal.
B. Esophagus:Muscular tube conveying food to the stomach.
C. Rectum:Terminal segment of the large intestine within the canal.
D. Gallbladder:Accessory organ that stores bile.
E. Pharynx:Shared passage that moves food/fluids to the esophagus (and air to the larynx).
F. Small intestine:Major segment of the canal for digestion and absorption.
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