UNIT 2 Sensitivity
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The document summarizes key aspects of the nervous system and senses. It discusses how the nervous system is made up of the central nervous system (brain and spinal cord) and peripheral nervous system. It captures information from the five senses through sense organs like the eyes, ears, nose, tongue and skin. This sensory information is sent to the brain via sensory neurons. The brain then interprets the information and sends signals to the rest of the body using motor neurons to coordinate responses. The nervous system controls everything we do through reflex actions and voluntary movements.
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The nervous system consists of the central nervous system (brain and spinal cord) and the peripheral nervous system. The central nervous system processes information from the senses and controls and coordinates the body's activities, while the peripheral nervous system connects the central nervous system to the limbs and organs. Key components include neurons, which transmit signals; the brain, which controls the body's responses; and the spinal cord, which connects the brain to the rest of the body. The nervous system allows for voluntary and involuntary responses through reflex arcs that transmit signals from sensors to effectors.
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This document provides an overview of the nervous system and its main components. It discusses that the central nervous system, made up of the brain and spinal cord, controls all the body's activities. The peripheral nervous system connects the central nervous system to other parts of the body through nerves and senses organs like the eyes, ears, skin etc. It describes how senses like vision, hearing, touch, smell and taste allow the body to receive information from the environment and send it to the brain for processing.
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The central nervous system controls all of the body's activities and consists of the brain and spinal cord. The brain controls everything in the body and is divided into three main parts - the cerebrum, cerebellum, and brain stem. The cerebrum controls functions like thinking, memory, and movement. The cerebellum controls balance and posture. The brain stem connects the brain to the spinal cord and controls vital functions. The outer nervous system connects the central nervous system to the rest of the body through nerves and sense organs like the eyes, ears, skin, and tongue. It controls automatic reflexes and functions we don't consciously think about.
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UNIT 2 Sensitivity
- 2. Sounds and sign language The function of sensitivity Internal coordination Senses and organ senses The nervous system
- 3. ENGLISH CATALÀ ENGLISH CATALÀ Nervous system Taste buds Brain Touch Nerves Sense ogans Neurons Stimuli Spinal cord Sign language Send Visibility Receive Deaf Hearing Coordinated Sight Interpret Sweat gland Disability Taste Distinguish
- 4. Through the sensitivity, we respond to changes in the external environment. These changes are called stimuli. Stimulus is anything that causes a reaction in an organism. • An animal is cold so it moves into the sun • If we walk into a room and there is a bad smell, we respond leaving the room.
- 5. SENSE ORGANS BRAIN THE LOCOMOTOR SYSTEM Capture information from the environment Receives and interprets the information and decides how we should respond Muscles receives orders from the brain and work with bones to make the body move.
- 9. The light goes into the eye through the pupil and the lens. The lens projects the image on the retina. The retina is made up of cells which notice the light and the colours. The information of the image is sent to the brain through the optic nerve.
- 10. The sound goes in through the outer ear and hits the eardrum. It passes to the middle ear and the tiny bones transmit the vibrations to the inner ear. The cochlea sends the information to the brain through the auditory nerve.
- 11. The information captured by receptors in the taste buds travels to the brain through the taste nerves. The brain receives and interprets this information.
- 12. The taste buds are on the tongue. They notice four taste sensations: - Sour. - Sweet. - Salty. - Bitter. The taste buds send the information to the brain through the gustative nerve. TASTE BUDS
- 13. The nose is made up of the nostrils and the nasal cavity. On the top of the nasal cavity there is the pituitary. It is a membrane which notice the smells. The pituitary sends the information to the brain through the olfactory nerve.
- 15. THE NERVOUS SYSTEM The nervous system receives and responds to information from the five sense. It controls everything you do! The nervous system produces reflex actions. https://www.youtube.com/watch?v=-nH4MRvO-10 https://www.youtube.com/watch?v=sjyI4CmBOA0
- 17. The nervous system is made up of two parts: The central nervous system (brain and spinal cord) The peripheral nervous system (all the nerves in our body) It is formed by nervous tissue (neurons).
- 18. Neurons are grouped together to form nerves. They have three parts: Body. The widest part of the neuron. Dendrites, which receive messages from the sense organs or other neurons. Axon, which transmit messages to other neurons. https://www.youtube.com/watch?v=JBKKzfRNkAQ https://www.youtube.com/watch?v=Ta_vWUsrjho
- 20. The brain is the control centre of the whole nervous system. The brain is made up of three parts: Cerebrum Cerebellum Brain stem
- 21. It is the biggest part of our brain. It controls our thoughts, emotions, language, behaviour and voluntary movements. It is divided into left and right hemispheres.
- 23. The cerebellum controls balance, movement and coordination.
- 24. The brain stem controls involuntary movements (breathing, digestion...) It connects the brain to the
- 25. The spinal cord is made up of nerve tissue and runs from our brain down our spine. It controls reflex actions. (spontaneous actions that protect our bodies from danger)
- 27. The peripheral nervous system is made up of nerves. It connects the central nervous system to our sense organs, muscles, internal organs, etc.
- 28. 1.Sensory neurons transport information from the sensors (eyes, ears, nose, tongue and skin) to the brain (central nervous system). 2.The brain interprets the information and decides how to respond. 3.Motor neurons carry messages away from the brain to the rest of our body and muscles.
- 33. TEACHER LETICIA