Nervous System, Brain
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Cards (41)
- A receptor checks if a stimulus is too high or low.
- A synapse is between 2 neurons. A chemical travels across the synapse. And diffuses across it.
- In the Central Nervous System(CNS), 1) A stimulus is detected, Receptors are stimulated. 2) Sensory Neurones carry info from Receptors to CNS 3) CNS sends info to effectors by motor neurons.
- coordination centre recieves and processes information and organises a response
- Coordination Centres: The Brain, Pancreas, Spinal Cord.
- Nerve Cell: Carry electrical impulses, They are long and thin and pass messages to other nerve cells. They have dentrites.
- Cerebral Cortex (wrinkly) - Intelligence,memory,language.Medulla - Unconscious - Heartbeat, breathing.Cerebellum - Muscle
- Reflexes help prevent injury. They are quick and automatic.
- The Nervous System allows humans to react to surroundings and coordinate behaviour.
- The Brain and Spinal Cord are part of the CENTRAL Nervous System.
- Name two types of effector and how they act:
- Muscles contract
- Glands secret hormones
- The brain is responsible for complex behaviours
- The Medulla controls the unconcious - like breathing and heartbeat
- Cerebal Cortex is responsible for conciousness like memory, language, intelligence.
- Cerebellum is responsible for muscle contraction
- MRI Scanners are used to take detailed photos of the brain structures.
- Suggest how the fMRI scanner could help to find out more about the brain damage a person has:
- It can help find out where exactly the damage is.
- easy to compare with someone without brain damage
- Can see which part of the brain is working.
- Why is treating the brain hard?
- Its in the skull and is hard to access
- Its complex and complicated
- Many things can go wrong like infections
- How to Scienctists study the brain?
- Electrically stimulating the brain
- Study people with brain damage
- Using MRI Scanners
- The Effectors are the Muscles and glands that respond to the nervous impulses