Flashcards
7.2:Nervous Control Flashcards
Cards in this deck (20)
- 1What is the nervous system made out of?The nervous system is made out of trillions of nerves called neurons
- 2What are neurons?Neurons are specialised cells that transmit electrical messages from one part of your body to another at a very high speed.
- 3What are the electrical messages that trave around your body in one direction called?Nerve impulses
- 4What do neurons contain?A neuron contains all the features of an animal cell including a cell membrane, nucleus and cytoplasm
- 5What 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.
- 6What do dendrites do?Dendrites branch out from the cell body and receive messages from other nerve cell that are sent to the cell body
- 7What are the three different types of neurons-Motor neurons
-Sensory naurons
-connecter neurons - 8What is motor neuron function?The main purpose of motor neurons is to carry messages from the CNS to the effectors.
- 9What are effectors and what is its main purposeEffectors are muscles or glands that translate the message into action
- 10What's the main purpose of a sensory neuronSensory neurons carry messages to the brain and spinal cord from cells in the sense organ such as your eyes or skin.
- 11Purpose of a connector neurontransmit messages between neurons and the CNS
- 12How much neurons does the human brain contain?About 100 billion neurons
- 13What is the volume of the human brain.1200-1400ml
- 14What are the two parts of the cerebrum?The left and right cerebral
hemisphere - 15what is the insulating layer that covers neaurons?The myelin sheath
- 16What does the Medulla do?The medulla controls vital functions such as breathing,blood pressure and heart rate.
- 17What is a reflex action?A reaction where you do something involuntarily and fast.
- 18Example of a reflex action
- 19What's a stimulus
- 20What do the cranium and vertebrae both do?Protect the brain from any damage.
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- Flashcards on 7.2:Nervous Control Flashcards , created by Asiya Mohamed Farah on 18/02/2018.
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- Asiya Mohamed Farah
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