Biology SL
Biology SL
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 SL
Biology SL

Theme C - Interaction & Interdependence

Unlocking Chemical Secrets of Neurotransmitters

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

Table of content

Chemical diversity n signalling chemicals 🌈

  • Definition: Signalling chemicals = substances used for communication within the body.
  • Fact: Such systems, particularly using hormones & neurotransmitters, have evolved over and over again. 🦠➡️🐒
  • Requirements of a Signalling Chemical:
    • Unique Shape & Properties: So that receptors can identify them (Think of it like a lock and key, only the right key fits!)
    • Size & Solubility: They need to be tiny & soluble so they can easily travel around.

Newt mating & nitrous oxide 🐸

  • Meet the Crested Newt (Triturus carnifex)
    • Male's Moves
      • Sniff, Sniff: First, he sniffs the female's head. (Kind of like a "Hello!")
      • Tail Wave: Waves his tail toward her head. (It's like saying "Hey, check this out!")
      • Tail Hit: Bonks her on the head with his tail. (Kind of a risky move!)
      • The Gift: Places sperm next to her.
    • Female's Reaction
      • If she's interested, she stays still & then picks up the sperm.
      • If she's not feeling it, either of them can just walk away.

Real-World Connection: This is like a dance between two people! But remember, it's all about reading signals.

Questions to ponder

  • How can the male know he's wooing the right species of newt? (Hint: Maybe the sniffing? 🤔)
  • How does the female decide if the guy is Mr. Right or Mr. Not-So-Right? (Could be the dance moves... or tail bonks!)

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

Theme C - Interaction & Interdependence

Unlocking Chemical Secrets of Neurotransmitters

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

Table of content

Chemical diversity n signalling chemicals 🌈

  • Definition: Signalling chemicals = substances used for communication within the body.
  • Fact: Such systems, particularly using hormones & neurotransmitters, have evolved over and over again. 🦠➡️🐒
  • Requirements of a Signalling Chemical:
    • Unique Shape & Properties: So that receptors can identify them (Think of it like a lock and key, only the right key fits!)
    • Size & Solubility: They need to be tiny & soluble so they can easily travel around.

Newt mating & nitrous oxide 🐸

  • Meet the Crested Newt (Triturus carnifex)
    • Male's Moves
      • Sniff, Sniff: First, he sniffs the female's head. (Kind of like a "Hello!")
      • Tail Wave: Waves his tail toward her head. (It's like saying "Hey, check this out!")
      • Tail Hit: Bonks her on the head with his tail. (Kind of a risky move!)
      • The Gift: Places sperm next to her.
    • Female's Reaction
      • If she's interested, she stays still & then picks up the sperm.
      • If she's not feeling it, either of them can just walk away.

Real-World Connection: This is like a dance between two people! But remember, it's all about reading signals.

Questions to ponder

  • How can the male know he's wooing the right species of newt? (Hint: Maybe the sniffing? 🤔)
  • How does the female decide if the guy is Mr. Right or Mr. Not-So-Right? (Could be the dance moves... or tail bonks!)

Unlock the Full Content! File Is Locked Emoji

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