| A | B |
|---|
| gray matter | part of the central nervous system that is composed of cell bodies and unmyelinated fibers |
| hypothalamus | part of the diencephalon that regulates the pituitary gland, autonomic nervous system, water balance, appetiti, temperature, and emotions |
| limbic system | the emotional brain |
| medulla oblongata | part of the brain stem that controls vital functions, such as respiratory and cardiovascular function |
| meninges | membranes that cover the brain and spinal cord; include the dura mater, arachnoid mater, and pia mater |
| myelin | white fatty material that covers some nerve fibers |
| mixed nerves | nerve taht contains both sensory and motor fibers |
| motor nerves | collection of motor neurons that carries information away from the cnetral nervous system |
| muscarinic receptor | cholinergic receptor activated by acetylcholine; located primarily on the target organs of the parasympathetic nerves |
| neuroglia | nerve cells that support, protect, and nourish the neurons |
| neuron | nerve cell that conducts the action potential (nerve impulse) |
| neurotransmitters | chemical made within the axon terminal responsible for transmission of the signal across the symapse of junction |
| nicotinic receptor | a type of cholinergic receptor that is activated by acetylcholine;located in the autonomic ganglia and within the neuromuscular junction |
| nerve tracts | group of neurons that share a common function within the central nervous system; may be ascending (sensory) or descending (motor) |
| norepinephrine | a neurotransmitter secreted by the adrenergic fibers of the sympathetic nervous system; activates adrenergic receptors |
| occipital lobe | cerebral lobe located in the back of the head; concerned primarily with vision |
