Question

When evaluating the musculature of the GI tract there are two major types of contractions. Sphincters...

When evaluating the musculature of the GI tract there are two major types of contractions. Sphincters typically have ________________ while Small intestines typically have ________________.

a. Tonic contractions; Phasic Contractions

b. Phasic Contractions; Tonic Contractions

c. Rapid contractions; phasic contractions

d. slow wave contractions; tonic contractions

Science   Anatomy-And-Physiology   
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Answer #1

Answer a) Tonic contractions ,Phasic contractions

Gastrointestinal tract have smooth muscle cells which generate motility by its contraction

Contractions can be of two type either Tonic or Phasic contractions

.Tonic contractions are contractions that when started are maintained from minutes up to hours at one point of time .These . These type of contractions predominantly seen in Sphincters of gastrointestinal tract .

The other type of contractions, called phasic contractions, consist of transient periods of both relaxation and contraction, occurring in the small intestine, and are carried out by the muscularis externa.

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