Term
| voltage regulated Na+ gates open |
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Definition
| When a neuron is depolarized to theshold |
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Definition
| The falling phase of an action potential results from |
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Definition
| Nerve signals travel fastest in |
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Definition
| A neuron fires only when its membrane reaches |
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Term
| Na+ is entering the neuron |
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Definition
| During the rising phase of an action potential |
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Term
| one axon and one dendrite arising from the soma |
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Definition
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Term
| the myelin sheath and neurilemma |
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Definition
| The regeneration tube of a peripheral nerve fiber consists of |
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Term
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Definition
| Mature neurons lack centrioles. You would expect these neurons to be unable to |
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Term
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Definition
| Glial cells which resemble a cuboidal epithelium without the basement membrane and produce cerebrospinal fluid (CSF) are called |
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Term
| glial cells; blood-brain barrier |
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Definition
| Most adult brain tumors are composed of _______ cells and cannot be treated by chemotherapy because of the ________ |
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Term
| Na+ gates open; K+ gates open; Na+ gates close |
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Definition
| The correct sequence of voltage-regulated gates opening and closing in an action potential |
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Term
| pia mater; filum terminale |
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Definition
| The innermost meninx around the spinal cord is called the _____ and extends beyond the medullary cone as the ________ |
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Term
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Definition
| The white matter of the cerebellum constitutes its |
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Term
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Definition
| Almost all sensory signals pass through the _____ on the way to the cerebrum. |
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Term
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Definition
| The _______ contains nuclei that control coughing, sneezing, swallowing and vomiting. |
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Term
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Definition
| The brain center most concerned with emotion is |
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Term
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Definition
| Taste buds are found on all the lingual papillae except for the ____ type |
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Term
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Definition
| The _____ is attached to the medial side of the tympanic membrane. |
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Term
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Definition
| The neurons and all glial cells except microglia are derived from embryonic tissue called ___ that thicken to form a structure called the _____ in the 3rd week of embryonic development |
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Term
| central canal and ventricles |
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Definition
| The lumen of the neural tube develops into the |
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Term
| dura mater; dural sinuses |
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Definition
| The outer double meningeal layer around the brain is called the _____ and in some places the two layers are separated by ______ |
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Term
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Definition
| An individual is experiencing a high fever, stiff neck, drowsiness and intense headaches. A spinal tap showed bacteria and white blood cells in the cerebrospinal fluid. This individual most likely has |
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Term
| choroid plexus; ependymal cells |
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Definition
| A network of capillaries in the brain that produces cerebrospinal fluid is called the _____ and is surrounded by glial cells called ____ |
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Term
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Definition
| The cerebellum develops from the embryonic |
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Term
| glucose, water, oxygen, alcohol and caffeine |
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Definition
| The blood-brain barrier is most permeable to this group of chemicals |
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Term
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Definition
| In this disorder, oligodendrocytes and myeline sheaths of the CNS deteriorate and are replaced by hardened scar tissue |
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Term
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Definition
| Most concerned with motor coordination and equilibrium |
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Term
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Definition
| Lobe of the cerebrum most concerned with vision |
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Term
| the arachnoid villi and dural sinuses |
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Definition
| Cerebrospinal fluid returns to the bloodstream by way of |
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Term
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Definition
| Not under the control of the ANS |
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Term
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Definition
| Triglycerides consist of 3 fatty acids combined with a |
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Term
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Definition
| Homeostasis is maintained primarily by |
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Term
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Definition
| Sex drive, body temperature and food and water intake are regulated by |
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Term
| dura mater, arachnoid mater, pia mater |
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Definition
| From superficial to deep, the meninges occur: |
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Term
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Definition
| Carries signals to the skin and skeletal muscles |
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Term
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Definition
| The most abundant glial cells in the CNS and constitute over 90% of the tissue in some areas of the brain |
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Term
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Definition
| Resting membrane potential (mV) |
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Definition
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