Stack #78328
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
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| Nervous System | The control system of the body
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| Stimulus | Any internal or external change that brings about a response.
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| Types of External Stimuli | Noise, light, the smell of food, and the temperature of the air.
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| Types of Internal stimuli | Chemical substances such as hormones.
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| What are the two anatomical divisions of the nervous system? | 1. Central Nervous System (CNS) 2. Peripheral Nervous System (PNS).
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| What does the CNS consist of? | Brain, Spinal Cord
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| What does the PNS consist of? | All of the nerves outside of the CNS, cranial nerves and spinal nerves.
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| What does the PNS connect? | The brain and spinal cord to other body parts.
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| Name the three parts of the brain. | 1. Brain stem 2. Cerebellum 3. Cerebrum
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| Cerebrum | The largest part of the brain where thinking takes place, input fromsenses are interpreted and memory is stored.
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| Cerebellum | Controls voluntary muscle movements, maintains muscle tone, and helps maintain balance.
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| Brain Stem | Located at base of brain, controls involuntary actions such as heart beat, breathing and blood pressure.
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| Spinal Cord | Carries signals from all parts of the body to the brain and from the brain to all parts of the body.
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| Vertebral column | Protects the spinal cord
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| A severe blow to the head can result in.. | Temporary or permanent loss of mental and physical abilities
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| Injury to the spine can result in.. | Paralysis..a loss of muscle movement.
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| What are the basic functional units of the nervous system? | Nerve cells or neurons.
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| How many neurons is the brain made up of? | 100 billion neurons.
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| What is a nerve cell made up of? | A cell body and branches called dendrites and axons.
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| What is a synapse? | When there is communication between the dendrite of one nerve cell and the axon of another nerve cell.
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| What happens during a synapse? | An impulse reaches the end of an axon and the axon releases a chemical, this chemical flows across the synapse and stimulates the impulse in the dendrite of the next neuron.
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| In what direction does an impulse move? | Neurons are adapted so that they move in only one direction like a relay race with the baton represented the chemical at the synapse.
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| What is a reflex? | An involuntary automatic response to a stimulus.
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| Can you control reflexes? Why? | No, you cannot control reflexes because they occur before you know what has happened.
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| What does a reflex or reflex arc allow the body to do? | It allows the body to respond without having to think about what action to take.
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| Where are reflex responses controlled? | In you spinal cord, not your brain.
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| Why does the brain act after a reflex? | The brain acts after a reflex to help you figure out what to do to make the pain stop.
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Created by:
jcarruth
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