Buy Anatomy and Physiology Homework Assignment

Buy Anatomy and Physiology Homework Assignment
Buy Anatomy and Physiology Homework Assignment
1. Which of the following statements could be applied to “external respiration”?
A. Exchange of gases between alveolar air and the blood in pulmonary
capillaries.
B. Exchange of dissolved gases between blood in tissue capillaries and the
body tissues.
C. The production of CO 2 from organic molecules in the cells by using O 2 .
D. The inhalation of atmospheric air into the lungs followed by exhalation.
Answer is: A External respiration refers to the movement of oxygen from the
alveoli into the capillary blood and carbon dioxide from the capillary blood into
the alveoli. Choice B is “internal respiration” and choice C is “cellular
respiration”.
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2. Which anatomical structures does the “conducting zone” of the lower respiratory tract contain?
A. Eustachian tube, larynx and trachea.
B. Primary, secondary and tertiary bronchi and bronchioles.
C. Nares, conchae, olfactory mucosa and sinuses.
D. Nasopharynx and larynx.
Answer is B: The conducting zone is distal to the trachea and before the
alveoli.
3. What is the function of the cilia on the cells that line the bronchial tree?
A. They help mix the inhaled fresh air with the residual air contained in the
bronchial tree.
B. They slow the movement of air to allow for effi cient exchange of gases.
C. They move the mucus on the cell surface up out of the bronchial tree.
D. They fi lter particles from inhaled air.
Answer is C: The beating of the cilia moves mucus lying on the surface of the
epithelium of the conducting zone, and any contained dust, up out of the bronchial tree.
4. One of the following statements is correct. Which one?
A. The visceral pleura is attached to the chest wall and the parietal pleura is
attached to the lung.