Biology HL
4
Chapters
553
Notes
Theme A - Unity & diversity
Theme B - Form & Function
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Biology HL
Theme C - Interaction & Interdependence
Unlock the Secrets of Peristalsis Control!
522 words
3 mins read
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.
- Types
-
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! 
Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟
Biology HL
Theme C - Interaction & Interdependence
Unlock the Secrets of Peristalsis Control!
522 words
3 mins read
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.
- Types
-
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!
Dive deeper and gain exclusive access to premium files of Biology HL. Subscribe now and get closer to that 45 🌟