Psychology HL
10
Chapters
298
Notes
Unit 1 - Research Methodology
Unit 2 - Biological Approach To Behaviour
Unit 3 - Cognitive Approach To Behaviour
Unit 4 - Sociocultural Approach To Behavior
Unit 5 - Abnormal Psychology
Unit 6 - Health psychology
Unit 7 - Psychology Of Human Relationships
Unit 8 - Developmental Psychology
Unit 9 - Internal Assessment
Unit 10 - The IB Curriculum - A Conceptual Model
Psychology HL
Unit 2 - Biological Approach To Behaviour
Unlocking Secrets: Nervous System & Its Marvelous Mysteries
658 words
4 mins read
Last edited on 16th Oct 2024
Table of content
Nitty-gritty of the nervous system 🧠
- Behaviour is influenced by our physiology, especially our nervous and endocrine systems.
- When we talk about the nervous system's structure, think about the physical parts. And when we talk about function, think about what it does!
Neuron party facts 🎉
- The nervous system is packed with neurons (nerve cells).
- Each neuron has
- A body (soma): The main part of the cell.
- Dendrites: Think of them as cell's arms grabbing signals.
- Axon: A long tail that sends signals forward.
- Neurons meet at places called synapses.
- Fun fact: the term “synapse” is derived from Greek, meaning “to join or connect.”
- Each neuron can connect with about 15,000 other neurons. It’s like each neuron is ultra-popular on "Neurobook"!
Information transfer 101 💡
- The information is passed both electrically and chemically.
- Imagine the neuron getting excited. If it gets REALLY excited, it sends a pulse (called an action potential). This is all-or-none, like turning on a switch. No half measures here!
- Example: This is similar to binary code in computers – it's all about 0s and 1s.
Chemical connection 🔬
- Once the pulse reaches the end of the axon, the real chemical magic starts. The axon releases neurotransmitters into the synaptic gap.
- Think of neurotransmitters as tiny chemical mailmen delivering messages.
- After their message is delivered, they can be
- Destroyed (kinda like burning a letter).
- Pulled back (like getting a letter returned).
- Or bind to another neuron to pass the message on.
Neurotransmitter types 🌈
- Excitatory: These give a thumbs-up and tell the impulse, "Go ahead!"
- Inhibitory: These say, "Hold up! Not so fast!" and stop the impulse.
- When these two are out of balance, it can lead to mental disorders.
Unlock the Full Content! 
Dive deeper and gain exclusive access to premium files of Psychology HL. Subscribe now and get closer to that 45 🌟
Psychology HL
Unit 2 - Biological Approach To Behaviour
Unlocking Secrets: Nervous System & Its Marvelous Mysteries
658 words
4 mins read
Last edited on 16th Oct 2024
Table of content
Nitty-gritty of the nervous system 🧠
- Behaviour is influenced by our physiology, especially our nervous and endocrine systems.
- When we talk about the nervous system's structure, think about the physical parts. And when we talk about function, think about what it does!
Neuron party facts 🎉
- The nervous system is packed with neurons (nerve cells).
- Each neuron has
- A body (soma): The main part of the cell.
- Dendrites: Think of them as cell's arms grabbing signals.
- Axon: A long tail that sends signals forward.
- Neurons meet at places called synapses.
- Fun fact: the term “synapse” is derived from Greek, meaning “to join or connect.”
- Each neuron can connect with about 15,000 other neurons. It’s like each neuron is ultra-popular on "Neurobook"!
Information transfer 101 💡
- The information is passed both electrically and chemically.
- Imagine the neuron getting excited. If it gets REALLY excited, it sends a pulse (called an action potential). This is all-or-none, like turning on a switch. No half measures here!
- Example: This is similar to binary code in computers – it's all about 0s and 1s.
Chemical connection 🔬
- Once the pulse reaches the end of the axon, the real chemical magic starts. The axon releases neurotransmitters into the synaptic gap.
- Think of neurotransmitters as tiny chemical mailmen delivering messages.
- After their message is delivered, they can be
- Destroyed (kinda like burning a letter).
- Pulled back (like getting a letter returned).
- Or bind to another neuron to pass the message on.
Neurotransmitter types 🌈
- Excitatory: These give a thumbs-up and tell the impulse, "Go ahead!"
- Inhibitory: These say, "Hold up! Not so fast!" and stop the impulse.
- When these two are out of balance, it can lead to mental disorders.
Unlock the Full Content!
Dive deeper and gain exclusive access to premium files of Psychology HL. Subscribe now and get closer to that 45 🌟