Biology HL
Biology HL
4
Chapters
553
Notes
Theme A - Unity & diversity
Theme A - Unity & diversity
Theme B - Form & Function
Theme B - Form & Function
Theme C - Interaction &  Interdependence
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Theme D - Continuity & Change
IB Resources
Theme C - Interaction &  Interdependence
Biology HL
Biology HL

Theme C - Interaction & Interdependence

Unlock the Secrets of Peristalsis Control!

Word Count Emoji
522 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

The Digestive Journey 🍔

  • Imagine a roller coaster track that starts from your mouth and ends at, well, the other end! That's your gut.
  • As your food takes a ride on this track, it's greeted with secretory hi-fives from gland cells within the gut wall and from "guest" glands like the pancreas. It's like those water guns at amusement parks, but with enzymes.
  • These enzymes break big molecules into small, absorbable stars, like sugars and amino acids, which get VIP access to the bloodstream.

The Muscle Moves of the Gut 💃

  • Smooth Moves: The gut's muscle wall isn't the jacked-up kind (that's striated muscle). It's more like a yoga enthusiast - smooth muscle.

    • Types
      • 🥖 Longitudinal Muscle: Like baguettes, running along the gut.
      • 🍩 Circular Muscle: Donut-shaped rings around the gut.
  • Muscle Behavior

    • Smooth Muscle: Can do a slow dance continuously and can break into a faster jig occasionally.
    • Striated Muscle: Chills until its favorite song (stimulation) plays, then it gets groovy.
  • Peristalsis: Imagine the wave at a sports game. That's peristalsis for the gut!

    • Behind the food: Circular muscles squeeze so food doesn't do a moonwalk back towards the mouth.
    • Where the food is: Longitudinal muscles ensure the food conga-lines forward.

Oesophagus & stomach surf 🌊

  • In the oesophagus, food catches a speedy peristaltic wave all the way to the stomach.
  • Only one surfing direction: away from the mouth. If food tries to surf back during vomiting, it's using a different technique - powered by abdominal muscles!

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IB Resources
Theme C - Interaction &  Interdependence
Biology HL
Biology HL

Theme C - Interaction & Interdependence

Unlock the Secrets of Peristalsis Control!

Word Count Emoji
522 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 14th Jun 2024

Table of content

The Digestive Journey 🍔

  • Imagine a roller coaster track that starts from your mouth and ends at, well, the other end! That's your gut.
  • As your food takes a ride on this track, it's greeted with secretory hi-fives from gland cells within the gut wall and from "guest" glands like the pancreas. It's like those water guns at amusement parks, but with enzymes.
  • These enzymes break big molecules into small, absorbable stars, like sugars and amino acids, which get VIP access to the bloodstream.

The Muscle Moves of the Gut 💃

  • Smooth Moves: The gut's muscle wall isn't the jacked-up kind (that's striated muscle). It's more like a yoga enthusiast - smooth muscle.

    • Types
      • 🥖 Longitudinal Muscle: Like baguettes, running along the gut.
      • 🍩 Circular Muscle: Donut-shaped rings around the gut.
  • Muscle Behavior

    • Smooth Muscle: Can do a slow dance continuously and can break into a faster jig occasionally.
    • Striated Muscle: Chills until its favorite song (stimulation) plays, then it gets groovy.
  • Peristalsis: Imagine the wave at a sports game. That's peristalsis for the gut!

    • Behind the food: Circular muscles squeeze so food doesn't do a moonwalk back towards the mouth.
    • Where the food is: Longitudinal muscles ensure the food conga-lines forward.

Oesophagus & stomach surf 🌊

  • In the oesophagus, food catches a speedy peristaltic wave all the way to the stomach.
  • Only one surfing direction: away from the mouth. If food tries to surf back during vomiting, it's using a different technique - powered by abdominal muscles!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟