Mass Peristalsis

Mass Peristalsis

“What is mass peristalsis? A detailed question and answers guide”

Question 1. Mass peristalsis.
Answer:

Mass peristalsis:

• They are simultaneous contractions of the smooth muscle occurring at the same time over a large portion of the colon.

Features:

• They occur more in the descending and sigmoid colon.
• It occurs only a few times every day.
• The duration is about 10 minutes in the morning before or after breakfast.

“Factors influencing success with mass peristalsis studies: Q&A”

Function:

• They propels the faeces from colon towards anus.
• They are the predominant contraction force during defecation.

Regulation:

• It is regulated by gastrocolic reflex and parasympathetic stimulation.

“Understanding mass peristalsis through FAQs: Composition, functions, and uses explained”

Question 2. Gastrin.
Answer:

• Gastrin is a peptide with 34 amino acid residues.

Sources of secretion:

• G cells of pyloric glands of stomach.
• TG cells in stomach, duodenum and jejunum.
• Islets in fetal pancreas.

“Common challenges in mastering mass peristalsis notes effectively: FAQs provided”

Actions:

• Stimulates gastric secretion and motility.
• Promotes growth of gastric mucosa.
• Stimulates release of pancreatic hormones.
• Stimulates secretion of pancreatic juice.

Factors effecting gastrin secretion:

1. Factors that increase gastrin secretion.

• Peptides and amino acids
• Distension of pyloric antrum.
• Increased vagal discharge.
• Calcium.
• E-pinephrine.

“Importance of studying mass peristalsis for medical students: Questions explained”

2. Factors that inhibit gastrin release.

• Acid in the antrum by release of so matostatin.
• Hormones like.
• Secretin.
• Gastric inhibitory peptide (GIP)
• Vasoactive intestinal peptide (VIP).
• Glucagon
• Calcitonin.