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Exam (elaborations)

NSG 5003 Exam Questions With Correct Answers

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NSG 5003 Exam Questions With Correct Answers In the mouth and stomach, salivary α-amylase initiates the digestion of which nutrients? a. Proteins c. Fats b. Carbohydrates d. Fiber - answerB: cabohydrates Salivary α-amylase is an enzyme that initiates only carbohydrate digestion in the mouth a...

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  • October 18, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NSG 5003
  • NSG 5003
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sirjoel
©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM



NSG 5003 Exam Questions With Correct
Answers


In the mouth and stomach, salivary α-amylase initiates the digestion of which nutrients? a.

Proteins c. Fats b. Carbohydrates d. Fiber - answer✔B: cabohydrates


Salivary α-amylase is an enzyme that initiates only carbohydrate digestion in the mouth and

stomach

Which elements in saliva protect against tooth decay? a. Salivary α-amylase and ptyalin b.

Secretin and IgA c. Endogenous enamelin and salivary β-amylase d. Exogenous fluoride and a

pH of 7.4 - answer✔D: exogenous fluoride pH 7.4


The bicarbonate concentration of saliva sustains a pH of approximately 7.4, which neutralizes

bacterial acids and prevents tooth decay. Exogenous fluoride (e.g., fluoride in drinking water) is

absorbed and then secreted in the saliva, providing additional protection against tooth decay.

Decay prevention is not associated with any of the other options.


Saliva contains which immunoglobulin (Ig)? a. IgA c. IgG b. IgE d. IgM - answer✔A: IgA


Saliva contains only IgA, which helps prevent infection.

, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM


What effect is a result of inhibiting the parasympathetic nervous system with a drug such as

atropine? a. Salivation becomes thinner. c. The pH of saliva changes. b. Salivation decreases. d.

Digestive enzymes are inhibited. - answer✔b: salivation decreases


The sympathetic and parasympathetic divisions of the autonomic nervous system control

salivation. Because cholinergic parasympathetic fibers stimulate the salivary glands, atropine (an

anticholinergic agent) inhibits salivation and makes the mouth dry. None of the other options is a

result of drugs such as atropine.

Food enters the stomach via which sphincter? a. Cardiac c. Gastric b. Upper esophageal d.

Fundal - answer✔A: cardiac


Each end of the esophagus is opened and closed by a sphincter. The upper esophageal sphincter

(cricopharyngeal muscle) prevents entry of air into the esophagus during respiration. The lower

esophageal sphincter (cardiac sphincter) prevents regurgitation from the stomach. The lower

esophageal sphincter is located near the esophageal hiatus—the opening in the diaphragm where

the esophagus ends at the stomach. The cardiac sphincter is the only option that fulfills the

function described in the question.

Which gastric cells secrete hydrochloric acid and intrinsic factor? a. Parietal c. G b. Chief d. H -

answer✔A: Parietal


Of the available options, only the parietal cells (oxyntic cells) secrete hydrochloric acid and

intrinsic factor.

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