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Saliva Functions in Tooth Maintenance

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Questions and Answers

How is retching initiated?

Sudden strong contraction of intercostal muscles

Forced expiration against a closed glottis

Sudden sharp contraction of the diaphragm

Forced inspiration against a closed glottis (correct)

What happens during retching in terms of pressure?

Intrathoracic pressure decreases

Duodenal pressure increases (correct)

Duodenal pressure decreases

Intrathoracic pressure increases

What is the main outcome of segmentation?

Mixing of gut contents with digestive juices (correct)

Localization of gut into small segments

Rapid movement of gut contents in an aboral direction

Constriction of circular smooth muscles

What characterizes a slow wave in the small intestine?

Slow undulating changes in resting membrane potential Signup and view all the answers

Why does segmentation slow down gut movement?

Constricts the lumen of the intestine Signup and view all the answers

Which muscle contractions assist in vomiting?

Diaphragm and abdominal muscles Signup and view all the answers

What is the key difference between retching and vomiting?

Muscle contraction and pressure changes Signup and view all the answers

What is the primary function of slow waves in the small intestine?

Regulate membrane potential changes Signup and view all the answers

What effect does segmentation have on the gut contents?

Constricts and dilates the lumen Signup and view all the answers

What is the role of the LES in the process of retching?

Opens during retching to allow entry of gastric content Signup and view all the answers