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Endocrine/Nervous

Biology 1 Honors/Vieira

QuestionAnswer
How does your central nervous system receive information? Through the peripheral nervous system and sensory neurons.
Which part of the nervous system do the nerves in your skin belong to? The Peripheral Nervous system (Touch sensation)
Why does caffeine make you feel jittery? It disrupts normal functions and can cause a lack of control of the body.
What are the three major parts of a neuron? Cell body, dendrites and axon.
What are the three types of neurons? Sensory neurons, inter-neurons and motor neurons.
What is a nerve impulse? An electrical charge called action potential.
What do neurons use to send impulses? Chemicals and electricity.
What are gaps in the myelin sheath of an axon called? Nodes.
Do all neurons have myelin? No.
What is a synapse? The distance between the dendrites and axon endings of two neurons.
What do neurotransmitters do? They help to create new action potential/impulse.
What does a neuron consist of at resting potential? At rest, there are more sodium ions outside and more potassium ions inside, this is because the Sodium potassium pump is active.
How man ions does the Sodium Potassium pump let out at a time? It lets out 3 Sodium ions for every 2 Potassium ions.
What is the charge of the inside of a neuron cell at rest? Negative since there is more positive Sodium outside.
What part of the neuron receives neurotransmitters? The Dendrites.
What makes protein channels open? Neurotransmitters cause these channels to open and it leads to rapid diffusion of Sodium.
What happens when sodium ions move into the cells? The cells get a positive charge.
What happens when more channels open? Potassium ions leave the cell and the negative charge is restored.
Where does this change in charge go? It moves down the axon like a domino effect.
Created by: ohyeahtas
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