This set of Human Anatomy Multiple Choice Questions & Answers (MCQs) focuses on “Respiratory Apparatus & Larynx”.
1. During inspiration the diaphragm ____________
a) Reflexes to become dome shaped
b) Contracts and flattens
d) Shows no change
Explanation: Drawing of breath is called as inhalation. It is also known as inspiration. During this process the air is drawn inside the lungs and the diaphragm contracts and flattens.
2. Lungs are covered by _______
a) Pleural membrane
Explanation: Pleural membrane is the thin, moist and has two layers. Between two layers is the intrapleural space, which contains fluid secreted by the membrane.
3. Total number of alveoli in both the lungs is?
Explanation: Alveoli are tiny sacs within the lungs. It allows carbon dioxide and oxygen t move between lungs and bloodstream.
4. Lungs have large number of narrow tubes called ____________
Explanation: Bronchioles are the smallest airways within the lungs. They are not encircled by any cartilage.
5. Alveoli of lungs are lines by ______
a) Squamous epithelium
b) Simple epithelium
c) Cuboidal epithelium
d) Columnar epithelium
Explanation: Squamous epithelium is a single layer of flat cells in contact with basal lamina. It helps in easy movement of gas in the lungs.
6. How many unpaired cartilage are present in larynx?
Explanation: There are 3 unpaired cartilages present in the larynx. They are cricoids, thyroid and epiglottis.
7. The thyroid cartilage has a posterior margin that forms superior and inferior horns.
Explanation: The posterior border of each lamina is prolonged upward and downward to form 2 projections, the superior horn and the inferior horn. The superior horns point upwards and backwards, the inferior horn points downwards.
8. The superior horn of thyroid cartilage is connected to which bone?
Explanation: Hyoid bone is horse shoe shaped bone situated in anterior midline of the neck. It lies at base of the mandible.
9. Larynx is found at what vertebral level?
Explanation: Larynx is a tube shaped organ in the neck. It contains vocal cords. It is about 5cm long. It is located between pharynx and trachea.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy and Physiology, here is complete set of 1000+ Multiple Choice Questions and Answers.