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Which type of channel is responsible for establishing the resting membrane potential?
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Which type of channel is responsible for establishing synaptic potentials?
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Nervous Tissue Test
Nervous Tissue II_Test
| Question | Answer |
|---|---|
| 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 |
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