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Nervous system
| Question | Answer |
|---|---|
| neuron | Cells that carry electrical impulses. |
| cerebellum | Regulates balance and coordination. |
| cerebrum | Part of the brain (4 lobes) that controls voluntary movement. |
| occipital lobe | Lobe of brain to control vision. |
| brain stem | Connects brain and spinal cord. 2 parts pons and medulla oblongata. |
| axon | carries impulse away from cell body. |
| myelin | Insulates the axon. Secreted by schwann cells. |
| resting potential | Neuron - in and + out. |
| action potential | Reversal of charges in neuron due to movement of ions. ( + in and - out) |
| cerebral cortex | Gray matter of cerebrum consisting of cell bodies. (outer) |
| white matter | Inner layer of cerebrum, consists of axons and myelin sheaths. |
| thalamus | Serves as connection between sensory receptors and the brain. |
| hypothalamus | Controls homeostasis... |
| photoreceptors | Sensitive to light (rods and cones) |
| mechanoreceptors | receptors to sense pressure changes. |
| gray matter | outer layer of cerebrum, called cerebral cortex. |
| cornea | light travels through this first |
| retina | inner tissue of eye, made up of photoreceptors |
| choroid | middle layer of eye tissue, blood vessles found here. |
| schlera | outer layer of eye tissue; provides shape to eye. |
| aqueous humor | liquid layer of eye behind the cornea. |
| iris | colored portion of eye, adjusts the size of the pupil. |
| pupil | light travel through this to the back of the eye, iris regulates this. |
| vitreous humor | gel like liquid area of eye, gives eye its shape. |
| optic nerve | carries nerve impulses from the eye to the braim. |
| motor neurons | carries impulses to muscles and organs. |
| sensory neurons | carries impulse from the sense organs to the brain. |
| stimulant | drug that causes increase heart rate, blood pressure... |
| depressant | drug that lowers blood pressure, heart rate. |
| rods and cones | Two types of photoreceptors. |
| axon | Long part of neuron that carries the impulse. |
| myelin sheath | Insulates the neuron. |
| schwann cells | secretes the myelin around the axon. |
| interneurons | connect the sensory and motor neurons. |
| central nervous system | made of the brain and spinal cord |
| peripheral nervous system | consists of all nerves and other connections. |
| neurotransmitter | chemical messangers that allow imulses to pass from neuron to neuron. |
| brain stem | consists of the medulla oblongata and the pons |
Created by:
tlawlor
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