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Biology NT: Reaction Time Experiments & Synapses Explained

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Eve Tierney

13/02/2023

Biology

Biology Mind Maps- The Nervous System

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Biology

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Homeostasis and response

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Coordination and control - the nervous system

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Required practical activity - the nervous system

Biology NT: Reaction Time Experiments & Synapses Explained

The nervous system coordinates responses to stimuli, enabling organisms to react to their environment. It consists of the central nervous system (brain and spinal cord) and the peripheral nervous system. Neurons transmit electrical impulses, with synapses facilitating communication between neurons through neurotransmitters. The process involves stimuli detection by receptors, coordination by the brain, and responses executed by effectors. Reaction time experiments measure the speed of these neural processes.

...

13/02/2023

315

The Nervous system is an Organ system that enables organisms to react to their environments and to coordinate their behaviour. The coordinat

View

Components of the Nervous System

This page delves deeper into the structure and function of the nervous system, defining key terms and concepts.

The nervous system is composed of various specialized cells and structures:

  1. Central Nervous System CNSCNS: Consists of the brain and spinal cord.
  2. Peripheral Nervous System PNSPNS: Controls motor output, such as running and walking.

Definition: Neurons are nerve cells that transmit electrical impulses throughout the body.

Types of neurons include:

  • Sensory neurons: Transmit impulses to the CNS
  • Motor neurons: Transmit impulses away from the CNS
  • Relay neurons: Make up the CNS

Vocabulary: Neurotransmitters are chemicals that carry messages across synapses.

The process of responding to environmental changes involves:

  1. Stimulus: A change in the external environment
  2. Receptor: The cell that detects the change
  3. Coordinator: The brain cell that decides the appropriate response
  4. Effector: The muscle or gland that reacts to the change
  5. Response: The body's reaction to the stimulus

Highlight: The nervous system's ability to rapidly process stimuli and generate responses is crucial for an organism's survival and adaptation to its environment.

The Nervous system is an Organ system that enables organisms to react to their environments and to coordinate their behaviour. The coordinat

View

Reaction Time Experiments

This page outlines methods for conducting reaction time experiments, which are essential for understanding the speed of neural processes.

Ruler Drop Test Method

  1. Hold a ruler just above the subject's hand.
  2. Drop the ruler without warning.
  3. Record the distance the ruler falls before being caught.
  4. Convert the distance cmcm to reaction time secondsseconds using a conversion table.

Example: A detailed reaction time experiment in biology GCSE might involve testing reaction times before and after consuming caffeine.

Variables in the ruler drop test:

  • Independent Variable IVIV: Level of caffeine in bloodstream
  • Dependent Variable DVDV: Reaction time distancetherulerwascaughtdistance the ruler was caught
  • Control Variables CVCV: Height above hand, level of distraction, amount of warning

Computer-Based Method

  1. Use a website like https://humanbenchmark.com/tests/reactiontime
  2. Record the first 10 reaction times
  3. Practice for 5 minutes
  4. Record the last 10 reaction times
  5. Calculate the percentage change in reaction time

Variables in the computer-based method:

  • IV: Amount of practice
  • DV: Reaction time secondsseconds
  • CV: Website used, distractions, dominant hand use, time of day, screen brightness

Highlight: Conducting a reaction time practical helps students understand how nerve impulse function affects response speed.

Example: A reaction time ruler test hypothesis might predict that caffeine consumption will decrease reaction time.

These experiments provide valuable insights into how quickly the nervous system can process information and generate responses, demonstrating the efficiency of nerve impulse transmission steps.

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Subjects

Biology

Homeostasis and response

Coordination and control - the nervous system

Required practical activity - the nervous system

 

Biology

•

315

•

13 Feb 2023

•

3 pages

Biology NT: Reaction Time Experiments & Synapses Explained

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Eve Tierney

@evetierneyy

The nervous system coordinates responses to stimuli, enabling organisms to react to their environment. It consists of the central nervous system (brain and spinal cord) and the peripheral nervous system. Neurons transmit electrical impulses, with synapses facilitating communication between neurons... Show more

The Nervous system is an Organ system that enables organisms to react to their environments and to coordinate their behaviour. The coordinat

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Components of the Nervous System

This page delves deeper into the structure and function of the nervous system, defining key terms and concepts.

The nervous system is composed of various specialized cells and structures:

  1. Central Nervous System CNSCNS: Consists of the brain and spinal cord.
  2. Peripheral Nervous System PNSPNS: Controls motor output, such as running and walking.

Definition: Neurons are nerve cells that transmit electrical impulses throughout the body.

Types of neurons include:

  • Sensory neurons: Transmit impulses to the CNS
  • Motor neurons: Transmit impulses away from the CNS
  • Relay neurons: Make up the CNS

Vocabulary: Neurotransmitters are chemicals that carry messages across synapses.

The process of responding to environmental changes involves:

  1. Stimulus: A change in the external environment
  2. Receptor: The cell that detects the change
  3. Coordinator: The brain cell that decides the appropriate response
  4. Effector: The muscle or gland that reacts to the change
  5. Response: The body's reaction to the stimulus

Highlight: The nervous system's ability to rapidly process stimuli and generate responses is crucial for an organism's survival and adaptation to its environment.

The Nervous system is an Organ system that enables organisms to react to their environments and to coordinate their behaviour. The coordinat

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Reaction Time Experiments

This page outlines methods for conducting reaction time experiments, which are essential for understanding the speed of neural processes.

Ruler Drop Test Method

  1. Hold a ruler just above the subject's hand.
  2. Drop the ruler without warning.
  3. Record the distance the ruler falls before being caught.
  4. Convert the distance cmcm to reaction time secondsseconds using a conversion table.

Example: A detailed reaction time experiment in biology GCSE might involve testing reaction times before and after consuming caffeine.

Variables in the ruler drop test:

  • Independent Variable IVIV: Level of caffeine in bloodstream
  • Dependent Variable DVDV: Reaction time distancetherulerwascaughtdistance the ruler was caught
  • Control Variables CVCV: Height above hand, level of distraction, amount of warning

Computer-Based Method

  1. Use a website like https://humanbenchmark.com/tests/reactiontime
  2. Record the first 10 reaction times
  3. Practice for 5 minutes
  4. Record the last 10 reaction times
  5. Calculate the percentage change in reaction time

Variables in the computer-based method:

  • IV: Amount of practice
  • DV: Reaction time secondsseconds
  • CV: Website used, distractions, dominant hand use, time of day, screen brightness

Highlight: Conducting a reaction time practical helps students understand how nerve impulse function affects response speed.

Example: A reaction time ruler test hypothesis might predict that caffeine consumption will decrease reaction time.

These experiments provide valuable insights into how quickly the nervous system can process information and generate responses, demonstrating the efficiency of nerve impulse transmission steps.

The Nervous system is an Organ system that enables organisms to react to their environments and to coordinate their behaviour. The coordinat

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

The Nervous System and Synapses

This page introduces the nervous system and its key components, focusing on the process of neural transmission through synapses.

The nervous system is an organ system that allows organisms to react to their environment and coordinate behavior. It consists of two main parts:

  1. The central nervous system CNSCNS: Comprises the brain and spinal cord, acting as coordinators.
  2. The peripheral nervous system: Connects the CNS to the rest of the body.

The process of neural transmission follows a specific pathway:

Stimulus → Receptor → Coordinator → Effector → Response

Definition: A synapse is a junction between two neurons where chemical transmission occurs.

The synaptic transmission process involves three main steps:

  1. An electrical impulse reaches the end of the nerve cell at the synapse.
  2. A chemical neurotransmitterneurotransmitter diffuses across the synaptic cleft.
  3. The chemical initiates a new electrical impulse in the next nerve cell, propagating the signal.

Highlight: Understanding synapses and nerve impulse transmission is crucial for comprehending how information flows through the nervous system.

Vocabulary: Synaptic cleft - The small gap between two neurons at a synapse where neurotransmitters are released.

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Best app on earth! no words because it’s too good

Thomas R

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Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

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Sudenaz Ocak

Android user

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Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

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