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Nervous Tissue Test

Nervous Tissue II_Test

Which type of channel is responsible for establishing the resting membrane potential? Passive channels
Which type of channel is responsible for establishing synaptic potentials? Chemically gated channels
An excitatory postsynaptic potential (EPSP) is produced when the movement of ions makes the inside of the cell more __________. positive
Ion channels on a typical excitatory synapse are specific for __________. cations, such as sodium and potassium
An inhibitory postsynaptic potential (IPSP) makes the inside of the cell more negative
Ion channels in a typical inhibitory synapse are specific for which of the following ions? Chloride
An example of a neurotransmitter that works indirectly, by using a second messenger instead of opening ion channels, is: GABA.
Which of the following neurotransmitters only act indirectly? Norepinephrine (NE)
Which of the following neurotransmitters can act both directly and indirectly? Acetylcholine (ACh)
When a neurotransmitter acts indirectly, it activates a G protein, which then activates an enzyme that produces a second messenger. What does the second messenger activate? An intracellular enzyme
Which of the following parts of the neuron contains the nucleus and most of the cytoplasm aand organelles cell body
A neurotransmitter shich prevents sodium channels from opening in the receiving (postsynaptic) neuron would be considered inhibitory
Which of the following is a true statement about neurotransmitters Neurons can release more than one kind of neurotransmitter; calcium is required in order for neurotransmitters to be released; it can be either excitary or inhibitory, depending on the effector that receives it
Which of the following would transmit an action potentional at the greatest speed thick myelinated fiber
A neuron which causes the contraction of a muscle or the secretion of a gland is called a motor neuron
An afferent neuron carries an action potentional from a sensory neuron toward the central nervous system
Neurons release neurotransmitters into the synaptic cleft or synapse
Created by: sweetlatrece



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