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Uilani Eckert
Physiology Stack 2
| Question | Answer |
|---|---|
| When neurotransmitters from synaptic knobs stimulate a postsynaptic neuron in rapid succession, their effect can add up over a brief period to produce an action potential. This is called | temporal summation. |
| T/F The sodium-potassium pump actively pumps three potassium ions out of the neuron and two sodium ions into the neuron. | False |
| A synapse can occur only between an axon and: a dendrite, another axon, a cell body, All of the above | All of the above |
| Movement of the membrane potential away from zero (below the usual RMP) is called | hyperpolarization. |
| Which of the following statements about amino acid neurotransmitters is incorrect? | They are among the most common neurotransmitters in the central nervous system (CNS). They are all inhibitory neurotransmitters, Glycine is a widely distributed inhibitory neurotransmitter in the spinal cord. All of the above statements are correct. |
| Which is true of an action potential? | The outside of the plasma membrane is negatively charged, and the inside is positively charged. |
| Both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors. |
| Once inside the sympathetic chain ganglion, the preganglionic fiber may: | synapse with a sympathetic postganglionic neuron. send ascending and/or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia. pass through one or more ganglia without synapsing. all of the above. |
| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | sensory perception |
| The part of the brain that assists in the maintenance of balance is the: | cerebellum. |
| T/F The parasympathetic and sympathetic divisions always act with a cooperative influence, and through summation of the impulses, the effect can be increased. | False |
| Accommodation for near vision necessitates | an increase in the curvature of the lens. constriction of the pupils. convergence of the two eyes. all of the above. |
| Fluid shift is when... | the body's fluids move between the fluid compartments. |
| What causes the ventricles to contract? | The inpulse to the SA node |
| The foramen ovale allows blood to move from the right atrium to the left atrium | bypassing pulmonary circulation |
| The process of red cells are production in the marrow of certain bones is referred to as | Erythropoiesis |
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ubacoro
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