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Which of the following sequences correctly represents the order air passes through during inhalation in the respiratory system?

A.

Nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli

B.

Nasal cavity, pharynx, trachea, larynx, bronchi, bronchioles, alveoli

C.

Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli

D.

Nasal cavity, larynx, pharynx, trachea, bronchi, bronchioles, alveoli

Answer and Explanation

The Correct Answer is A

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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Related Questions

Correct Answer is A

Explanation

A. Pancreas:Most of the pancreas (head, neck, body) lies retroperitoneal (except the tail which may be intraperitoneal).
B. Stomach:The stomach is intraperitoneal (suspended by mesenteries).
C. Liver:The liver is intraperitoneal (covered by visceral peritoneum except at bare area).
D. Spleen:The spleen is intraperitoneal and suspended by ligaments (not retroperitoneal).

Correct Answer is ["D","F"]

Explanation

A. Glomerulus – 6:The glomerulus is the capillary tuft labeled 2, not 6.

B. PCT – 9:The proximal convoluted tubule is labeled 7(first coiled segment after the capsule); there is no 9 shown.

C. Distal convoluted tubule – 8:The DCT is labeled 6(coiled segment after the ascending limb). 8points to the collecting system.

D. Nephron loop – 3, 4 and 5:3= descending limb, 4= hairpin turn, 5= ascending limb.

E. DCT – 9:DCT is 6; no 9 indicated.

F. Glomerular capsule – 1:The capsule (Bowman’s capsule) encasing the glomerulus is labeled 1.

G. Collecting duct – 1:The collecting duct is the long vertical duct on the right (labeled 7/8), not 1.

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