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Intestinal crypts secrete intestinal juice, which is slightly ____ in pH.

A.

Variable

B.

Neutral

C.

Basic

D.

Acidic

Answer and Explanation

The Correct Answer is C

A. Variable: While the pH of the gastrointestinal tract changes between segments, the specific secretion of the intestinal crypts is consistently maintained. It does not fluctuate randomly under normal physiological conditions. It remains within a specific alkaline range.

B. Neutral: A pH of 7.0 would not provide the necessary buffering capacity against the highly acidic chyme arriving from the stomach. Intestinal juice must be slightly higher than neutral. This alkalinity is essential for neutralizing gastric protons.

C. Basic: Intestinal juice typically has a pH ranging from 7.4 to 7.8 due to its high bicarbonate content. This alkaline fluid protects the duodenal mucosa from acid-induced injury. It creates the optimal environment for pancreatic enzyme activity.

D. Acidic: An acidic secretion would exacerbate the low pH of the incoming gastric chyme. The intestinal mucosa is not designed to withstand prolonged acid exposure without neutralization. Acidic secretions are characteristic of the stomach, not the crypts.


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Related Questions

Correct Answer is B

Explanation

False:The pancreas is primarily a retroperitoneal organ, with the exception of the tail which may be intraperitoneal. It is situated behind the lesser sac of the omentum. Its anatomical position at L1 and L2 is correct, but its peritoneal status is not.

Correct Answer is A

Explanation

A. Larynx:The glottis consists of the vocal apparatus and the space between the vocal folds. It serves as the entrance to the lower respiratory tract. It is protected by the epiglottis during the act of swallowing.

B. Pharynx:This is a muscular funnel that serves as a common pathway for both the digestive and respiratory systems. The glottis is a specific structure located within the larynx, which sits inferior to the oropharynx. It is not the pharynx.

C. Esophagus:The opening to this muscular tube is the upper esophageal sphincter, located posterior to the larynx. The glottis leads to the trachea, while the esophagus leads to the stomach. These are distinct anatomical pathways.

D. Nasal cavity:This cavity is located superior to the oral cavity and connects to the nasopharynx via the choanae. The glottis is located much further down in the neck. There is no direct anatomical connection between them.

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