PHGY 210 Lecture 5: digestion GIT lecture5
6 Apr 2017
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Document Summary
The electric character in git smooth muscle: the stomach, basic electrode rhythm, (the partial depolarization of the stomach muscular in distal part presence in the absence of meal. ) The contractions: peristalsis control by the spikes (the spikes only at the peak of. Ach and stretch within the stomach) the more spikes, the larger contraction of stomach wall, the larger peristatic wave. Liquid: due to the gradient of pressure (1~2 mmhg) just because of the receptive relaxation at the upper part of stomach which is not as low as the pressure in duodenum. The small gradient lead to the trickle of liquid( very slow from the storage, down to the pyloric sphincter which is not the barrier to the liquid) Solid: the more spikes, the more ach, the greater the contraction (control the amplitude of contraction) the frequency of contraction depend on ber( cant go faster than 3 peristatic wave/min. )
