Secondary_-_Nervous_System_PPT.pptx
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The document discusses the nervous system and its components. It notes that the nervous system allows the brain to quickly send messages to the rest of the body. The nervous system has two main parts: the central nervous system (CNS), comprised of the brain and spinal cord, and the peripheral nervous system (PNS). The PNS has two divisions - sensory and motor. Messages travel from the PNS to the brain and back very quickly, up to 150 meters per second. Faster reflex responses use the spinal cord to bypass the brain for quicker reactions. An experiment is described to test reflex response times over different distances.
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2 Human Body Nervous system.pptx
The nervous system has four primary functions: sensing the world, transmitting information, processing information, and producing responses. It is composed of neurons, which are the basic functional units that transmit electrochemical signals around the body. The nervous system has two main divisions: the central nervous system, comprising the brain and spinal cord, and the peripheral nervous system, comprising all other nerves. The central nervous system receives, interprets, and sends signals to the peripheral nervous system to coordinate body functions and responses.
2 Human Body Nervous system.pptx
The nervous system has four primary functions: sensing the world, transmitting information, processing information, and producing responses. It has two main divisions - the central nervous system (CNS) containing the brain and spinal cord, and the peripheral nervous system (PNS) containing all other nerves. The basic functional unit of the nervous system is the neuron, which transmits electrochemical signals through a reflex arc pathway involving sensory, inter, and motor neurons.
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The document provides an overview of the nervous system, including its main functions and divisions. It discusses the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which branches out from the CNS. Within these systems are neurons, the main cell type, and neuroglia which support neuron function. The document outlines the structure of neurons and how nerve impulses are conducted. It also describes the divisions of the nervous system including somatic, autonomic, afferent and efferent systems.
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The nervous system controls and coordinates functions throughout the body using electrical signals called nerve impulses. It is divided into the central nervous system (brain and spinal cord) which processes information, and the peripheral nervous system which connects to organs and muscles. Neurons are the basic units and can be sensory, motor, or connecting neurons. Nerve impulses travel along neurons and between neurons at synapses using neurotransmitters.
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The document discusses the nervous system, including:
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2 Human Body Nervous system.pptx
The nervous system has four primary functions: sensing the world, transmitting information, processing information, and producing responses. It is composed of neurons, which are the basic functional units that transmit electrochemical signals around the body. The nervous system has two main divisions: the central nervous system, comprising the brain and spinal cord, and the peripheral nervous system, comprising all other nerves. The central nervous system receives, interprets, and sends signals to the peripheral nervous system to coordinate body functions and responses.
2 Human Body Nervous system.pptx
The nervous system has four primary functions: sensing the world, transmitting information, processing information, and producing responses. It has two main divisions - the central nervous system (CNS) containing the brain and spinal cord, and the peripheral nervous system (PNS) containing all other nerves. The basic functional unit of the nervous system is the neuron, which transmits electrochemical signals through a reflex arc pathway involving sensory, inter, and motor neurons.
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The document provides an overview of the nervous system, including its main functions and divisions. It discusses the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which branches out from the CNS. Within these systems are neurons, the main cell type, and neuroglia which support neuron function. The document outlines the structure of neurons and how nerve impulses are conducted. It also describes the divisions of the nervous system including somatic, autonomic, afferent and efferent systems.
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The nervous system controls and coordinates functions throughout the body using electrical signals called nerve impulses. It is divided into the central nervous system (brain and spinal cord) which processes information, and the peripheral nervous system which connects to organs and muscles. Neurons are the basic units and can be sensory, motor, or connecting neurons. Nerve impulses travel along neurons and between neurons at synapses using neurotransmitters.
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crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
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- 1. Nervous System 'Presenter 1' 'Presenter 2' This activity has been supported by a grant from Roche Products Ltd
- 2. What do you know about the brain?
- 3. The brain has 2 sides: hemispheres
- 4. Neurons make networks Cortex Corpus callosum Cerebellum The brain is made up of different areas There are billions of neurons in the brain!!! Neuron
- 5. The nervous system allows the brain to send messages quickly to the rest of the body
- 6. Central Nervous System (CNS): Brain + spinal cord Peripheral Nervous System (PNS)
- 7. The CNS and PNS have a bidirectional communication
- 8. The brain sends messages to the opposite side of the body The brain receives messages from the opposite side of the body
- 9. The PNS has two main divisions: Sensory and Motor
- 10. The motor division of the PNS is subdivided in: Voluntary actions Involuntary actions
- 11. The involuntary system is divided into: Sympathetic ‘fight or flight’ Parasympathetic ‘rest and digest’
- 12. Messages travel form the PNS to the brain and back These electrical messages are sent very quickly - up to 150 metres/second What would happen if we needed a quicker response?
- 13. Faster messages: Reflexes Spinal cord Muscle Sensory nerve Motor nerve
- 14. The knee reflex experiment
- 15. How fast are you? Distance Time 2 in (~5 cm) 0.10 sec (100 ms) 4 in (~10 cm) 0.14 sec (140 ms) 6 in (~15 cm) 0.17 sec (170 ms) 8 in (~20 cm) 0.20 sec (200 ms) 10 in (~25.5 cm) 0.23 sec (230 ms) 12 in (~30.5 cm) 0.25 sec (250 ms) 17 in (~43 cm) 0.30 sec (300 ms) 24 in (~61 cm) 0.35 sec (350 ms) 31 in (~79 cm) 0.40 sec (400 ms) 39 in (~99 cm) 0.45 sec (450 ms) 5 seconds window
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