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Description
Flashcards by Asiya Mohamed Farah , updated more than 1 year ago
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Created by Asiya Mohamed Farah
almost 7 years ago
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| Question | Answer |
| What is the nervous system made out of? | The nervous system is made out of trillions of nerves called neurons |
| What are neurons? | Neurons are specialised cells that transmit electrical messages from one part of your body to another at a very high speed. |
| What are the electrical messages that trave around your body in one direction called? | Nerve impulses |
| What do neurons contain? | A neuron contains all the features of an animal cell including a cell membrane, nucleus and cytoplasm |
| What does the cell body contain and what does it do? | The cell membrane contains a nucleus which is the main control centre of a cell. |
| What do dendrites do? | Dendrites branch out from the cell body and receive messages from other nerve cell that are sent to the cell body |
| What are the three different types of neurons | -Motor neurons -Sensory naurons -connecter neurons |
| What is motor neuron function? | The main purpose of motor neurons is to carry messages from the CNS to the effectors. |
| What are effectors and what is its main purpose | Effectors are muscles or glands that translate the message into action |
| What's the main purpose of a sensory neuron | Sensory neurons carry messages to the brain and spinal cord from cells in the sense organ such as your eyes or skin. |
| Purpose of a connector neuron | transmit messages between neurons and the CNS |
| How much neurons does the human brain contain? | About 100 billion neurons |
| What is the volume of the human brain. | 1200-1400ml |
| What are the two parts of the cerebrum? | The left and right cerebral hemisphere |
| what is the insulating layer that covers neaurons? | The myelin sheath |
| What does the Medulla do? | The medulla controls vital functions such as breathing,blood pressure and heart rate. |
| What is a reflex action? | A reaction where you do something involuntarily and fast. |
| Example of a reflex action | |
| What's a stimulus | |
| What do the cranium and vertebrae both do? | Protect the brain from any damage. |
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