Exam 4: Principles of Neural and Hormonal Communication

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____________________ are a type of eicosanoids that promote platelet aggregation and constrict blood vessels.

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Figure 4-5 Use the accompanying diagram to answer the corresponding questions. Figure 4-5 Use the accompanying diagram to answer the corresponding questions.    -Which number in the figure represents a closed voltage-gated potassium channel? -Which number in the figure represents a closed voltage-gated potassium channel?

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What are the two basic forms of electrical signals?

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Any flow of electrical charges is called resistance.

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What are the two types of synapses between neurons?

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What is a type of paracrine that is a collection of protein signal molecules secreted by cells of the immune system,largely acting locally to regulate immune responses?

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Binding of the first messenger to the receptor activates the ____________________,which is a membrane-bound intermediary.

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A typical synaptic delay lasts for approximately ____.

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Using Internet connectivity as an analogy,the nervous system is generally described as a(n)____________________ system.

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Eicosanoids are modified from ____.

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The voltage-gated sodium channel has two gates: an activation gate and an inactivation gate.

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The amino acid ____________________ is a primary excitatory neurotransmitter in the central nervous system.

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The strength of a stimulus is coded by the ____.​

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Figure 4-5 Use the accompanying diagram to answer the corresponding questions. Figure 4-5 Use the accompanying diagram to answer the corresponding questions.    -Which number in the figure represents a closed and inactivated voltage-gated sodium channel? -Which number in the figure represents a closed and inactivated voltage-gated sodium channel?

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The endocrine system is specialized to control activities that require speed rather than duration.

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What class of drugs selectively blocks the reuptake of serotonin into presynaptic axon terminals?

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What ensures the one-way propagation of an action potential away from the initial site of activation?

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Voltage-gated sodium channels can exist in how many different conformations?

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What proportion of all drugs prescribed today act on G-protein-coupled receptors?

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____________________ potentials are local changes in membrane potential that occur in varying grades or degrees of magnitude or strength.

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