Term
| The blood brain barrier... |
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Definition
| Is formed in part by the tight junctions between the brain capillary cells. |
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Term
| The inner most meninge that covers the brain and spinal cord is known as the... |
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Definition
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Term
| Which of the following is not a function of astrocytes? |
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Definition
| Acts as the immune system in the CNS |
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Term
| Which statement regarding graded potentials is true? |
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Definition
| They travel in both directions along the membrane. |
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Term
| Which of the following statements concerning th absolute refractory period is not correct? |
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Definition
| The absolute refractory period occurs during the after hyperpolarization phase of the action potential. |
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Term
| Select the characteristic that is not associated with short term memory... |
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Definition
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Term
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Definition
| Blocks the relase of gamma-aminobutyric acid from presynaptic inputs terminating on neurons that supply skeletal muscles. |
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Term
| The falling phase of the action potential is due to... |
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Definition
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Term
| Assume a hypothetical postsynaptic neuron has three presynaptic inputs-X, Y, and Z. When presynaptic neuron X and Y are stimulated simultaneously, the postsynaptic neuron reaches threshold and undergoes an action potential, yet when presynaptic neuron X and Z are stimultated simultaneously, there is no change in the potential of the post-synaptic neuron. What can you tell about the presynaptic neurons Y and Z? |
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Definition
| Presynaptic neuron Y is excitatory and presynaptic neuron Z is inhibitory. |
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Term
| A threshold potential is... |
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Definition
| The point at which there is an explosive increase in sodium permeability. |
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Term
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Definition
| The axon terminal of a nerve cell branches to synapse with many other cells so that activity in one neuron influences the excitability of many other cells. |
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Term
| The normal sequence of structures activated in a reflex response: |
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Definition
| afferent-integrating center-efferent-effector |
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Term
| The region of the brain that is smallest and oldest in evolutionary development is the |
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Definition
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Term
| The nodes of Ranvier are... |
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Definition
| Breaks in the myelin covering an axon where action potentials can be generated. |
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Term
| Which type of glial cell lines the ventricles of the brain and have stem cell capabilities? |
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Definition
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Term
| Temporal summation takes place when: |
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Definition
| Two EPSPs from the same presynaptic input occur so closely together in the same time that they add together or sum. |
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Term
| What part of the brain plays a vital role in short-term memory involving the integration of various related stimuli and is also crucial for consolidation into long-term memory? |
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Definition
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Term
| Which of the following is the correct statement concerning the mechanism involved in senstization? |
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Definition
| An initaial noxious or strong stimulus results in the release of a neurotransmitter from a neuron that influences the afferent fiber by increasing the amount of transmitter released from the nerve terminal, resulting in a larger postsynaptic response to a second stimulus. |
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Term
| Which is not a function of the limbic system? |
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Definition
| Provide conscious perceptions. |
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Term
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Definition
| transmit information to the effector organs |
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Term
| Which of the following statements concerning cerebrospinal fluid is correct? |
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Definition
| Serves as a shock-absorbing fluid to suchion the brain against jarring movements. |
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Term
| Action potentials produced in myelinated axons use less ATP to wrap myelin around the axons because... |
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Definition
| Fewer action potentials are needed to propogate the action potentials down the axon due to the saltatory conduction. |
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Term
Sequence the following events involved at the synapse:
1. Depolarization of the presynaptic terminal
2. Diffusion of the neurotransmitter across the synaptic cleft
3. Opening of voltage-gated calcium deposits
4. Binding of neurotransmitter to receptors on the postsynaptic cell
5. Exocytosis of neurotransmitter from synaptic vessicles |
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Definition
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Term
| A change in membrane potential from -70mV to -20mV is an example of: |
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Definition
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Term
| Select the incorrect statement about the action potential... |
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Definition
| action potentials will sum to speed up transmission |
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Term
| A deficiency of the neurotransmitter dopamine in the basal necluei causes... |
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Definition
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Term
| Cocaine produces it's effect by __________ the effect of dopamine in the CNS by ___________ the reuptake transporter activity at dopamine receptors. |
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Definition
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Term
| _______ is responsible for learning and memory... |
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Definition
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Term
| Links endocrine and autonomic nervous system function |
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Definition
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Term
| _________ is responsible for inhibiton of musce tone. |
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Definition
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Term
| _________ is the only part of the brain where capillaries are not connected with tight junctions. |
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Definition
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Term
| ________ Controls thirst, urine output, food intake, and body temperature. |
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Definition
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Term
| Contains centers for respiration, heart, and blood vessel; function and many digestive activies. |
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Definition
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Term
_________ is involved with emotions, motivation, and reward.
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Definition
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Term
| _________ acts as a relay station. |
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Definition
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Term
| ________ is the area of the brain where loss of motor neurons and a decrease in dopamine result in Parkinson's disease. |
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Definition
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Term
| Responsible for language... |
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Definition
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Term
| Responsible for personality traits... |
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Definition
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Term
| Contains somatotsensory map |
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Definition
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Term
| initially processes visual input |
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Definition
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Term
| initally processes sound input... |
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Definition
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Term
| contains primary motor cortex... |
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Definition
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Term
| The mechanism associtated with long-term memory involves creation of new mRNA and proteins (T/f)? |
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Definition
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Term
| Strychine induces death by inhibiting choline acetyltransferase in the plasma membrane (t/f) |
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Definition
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Term
| Different parts of the body are equally represented in the somatosensory cortex and in the primary motor cortex (t/f) |
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Definition
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Term
| A stimulus that is stronger than normal will produce an action potential that deploarizes beyond +30mVs (t/f) |
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Definition
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Term
| The withdrawl reflex that occurs when you touch a hot plate is an example of a monosynaptic reflex (t/f) |
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Definition
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Term
| The conduction velocity of a nerve impulse is slower in myelinated fibers than in unmyelinated fibers because myelin acts as an insulator that slows down the flow of current (t/f) |
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Definition
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Term
| White matter in the brain consists of primarily myelinatedc nerve fibers (t/f) |
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Definition
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Term
| The cell bodies of afferent and efferent neurons both originate in the CNS (t/f) |
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Definition
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