Term
| What does the nervous system do? |
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Definition
| Receives sensory input, interprets it, and sends appropriate commands. |
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Term
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Definition
| A cell capable of carrying out some action in response to a command from the nervous system. |
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Term
| The nervous system is divided into two divisions. What are they? |
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Definition
| The CNS or Central Nervous System, and the peripheral nervous system. |
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Term
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Definition
| The CNS consists of the brain, vertebrates, and the spinal cord. |
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Term
| What is the peripheral nervous system? |
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Definition
| The peripheral nervous system is made up mostly of nerves that carry signals into and out of the CNS. |
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Term
| What are the three basic types of neurons? |
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Definition
| Sensory neurons, interneurons, and motor neurons. |
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Term
| What are sensory neurons? |
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Definition
| Sensory neurons conduct signals from sensory receptors to the CNS. |
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Term
| What are examples of sensory receptors? |
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Definition
| Light receiving cells in the eye, touch sensing cells in the skin, etc |
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Term
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Definition
| Interneurons are located entirely in the CNS and they integrate data and relay appropriate signals to other interneurons or to motor neurons. |
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Term
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Definition
| Motor neurons convey signals from the CNS to effector cells. |
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Term
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Definition
| An automatic reaction to a stimulus by the spinal cord and lower brain which is controlled. |
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Term
| Receptor cells (skin)-->sensory neurons-->_______________---->motor neuron (muscle) |
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Definition
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Term
| What is the functional unit of the nervous system? |
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Definition
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Term
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Definition
| A cell specialized for carrying signals |
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Term
| When is a neuron not transmitting an impulse? |
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Definition
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Term
| The outside of the membrane of the neuron has a net __________ charge. |
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Definition
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Term
| The inside membrane of a neuron has a net ______________ charge. |
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Definition
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Term
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Definition
| A stimulus alters the permeability of a section of membrane which allows ions to pass through and changes the membrane's voltage. |
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Term
| What is Electrical Polarization? |
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Definition
| there is a difference in electrical charges between the inner and outer surfaces. Changes in the concentrations in sodium and potassium ions cause polarization. |
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Term
| The nerve cells pumps sodium ions _________ the cell. |
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Definition
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Term
| The nerve cell pumps potassium ions ______ into the cell. |
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Definition
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Term
| By what does the cell pump potassium ions into the cell? |
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Definition
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Term
| In a resting state the neuron cell membrane is freely permeable to ____________ ions but not ________ions. |
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Definition
| Permeable to potassium ions, but not sodium ions |
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