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Drag & Drop the correct answers 1. Human Nervous System cranial nerve & spinal nerve ? Central Nervous System ? Peripheral Nervous System ? brain & spinal cord ? consists of: consists of 2. What is stimulus? What is response? hot pan ? quickly pull hand away ? Examples: 3. Chemicals in air ? Sound ? Pain ? Heat ? Cold ? 4. Nerve impulses are electrical signals Nerve impulses are mostly electrical signals The sensory cell in a nerve is called neuron or electrical messages impulse ? neuron ? 5. 1. detects 2. send 3. 4. produce interprets ? The functions of human nervous system impulse ? stimulus ? response ? impulse stimulus response impulse impulse brain 6. A A is an involuntary action An There are 2 actions because of the response: voluntary action ? brain ? reflex action ? involuntary action ? It cannot be controlled by a person is the action controlled by the is the action that happened automatically ? 7.
Knees ? Examples of reflex actions --- an involuntary action blow ? leg ? 8. 9.
Examples of reflex actions --- an involuntary action pin ? hand ? finger withdrawal when pricked with sharp object is a reflex action 10. 11.
Examples of reflex actions --- an involuntary action light ? pupil ? stimulus ? 12. Pupil contracts or dilates with light is a reflex action 13.
Examples of reflex actions --- an involuntary action sneezing ? irritants ? nasal ? 14. Sneezing is a reflex action 15. Receptors are groups of specialised cells. They detect a change in the environment (stimulus) 16. 17. stimulus response Voluntary Action The impulse Pathways Just press OK receptor effector Brain 18. stimulus ? response ? Voluntary Action The impulse Pathways receptor ? effector ? Brain ? 19. stimulus response Involuntary Action (Automatically) The impulse Pathways Just press OK receptor effector Spinal Cord 20. stimulus ? response ? Involuntary Action (Automatically) The impulse Pathways Just press OK receptor ? effector ? Spinal Cord ? 21. Human Nervous System spinal cord ? centre ? reflex action ? Brain ? function: to receive for all activities function: control impulses ? 22. Human Nervous System to transmit from the to otherparts of body Peripheral Nervous System function: spinal nerve ? spinal cord ? impulses ? 23. functions: to transmit to the other parts of the body from the cranial nerves ? brain ? impulses ? |