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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Which two ways do Nerve impulses travel? |
Direct - One nerve,
Indirect - nerve-nerve |
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What is a Nerve impulse? |
Action Potential
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A wave of change |
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What are the two types of nerve cells? |
Neurons & Neuroglia |
nerves and support |
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How many types of Neuroglia are there? |
6: 4 CNS, 2 PNS Astrocytes (blood brain barrier), Microglia (CNS immune cells), Ependymal (produce and circulate CSF), Oligodendrocytes (Myelin Sheath in CNS), Schwann Cells (Myelin Sheath in PNS), Satelite cells (Surrounds neuron cell body) |
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What is the role of a neuron? |
To conduct action potentials |
Message carriers |
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What makes the neuron different to other cells in the body? |
Neurons are Amiotic, a single cell can be a tissue, all the organelles are in the cell body (perikaryon) |
no division, 1 cell = tissue, body axon dendrites. |
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What are the two divisions of the nervous system? |
Central Nervous System (CNS), Peripheral Nervous System (PNS) |
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What structures are in the CNS? |
Brain and Spinal Cord |
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What structures are in the PNS? |
All nerves that aren't part of the CNS |
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How many cervical nerves are there? |
8, there are more nerves than vertebrae |
nerves leave the spinal column above and below the vertebre |
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What are the sections of the body that are looked after by spinal nerves called? |
Dermatomes |
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What order does a signal travel from stimuli to response? |
receptor - sensory (afferent) neuron - association neuron - motor (efferent) neuron - effector |
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What are the 2 branches of the Motor neuron system? |
Somatic - concious control Autonomic - involuntary |
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What are the two branches of the Autonomic system? |
Sympathetic - Fight or Flight Parasympathetic - Rest & Digest |
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What are the four lobes of each hemisphere? |
Frontal, Parietal, Occipital, Temporal |
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What are the structures of the diencephalon? |
Hypothalamus, Thalamus, Epithalamus |
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What are the structures of the brain stem? |
Midbrain, Pons, Medulla Oblongata |
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What are the three meninges that cover the brain? |
Dura (Strong), Aracnoid (Blood Vessels looks like spider web), Pia (delecate) |
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