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Physio Wk 7-13
| Question | Answer |
|---|---|
| A synapse can occur only between an axon and: | a cell body. another axon. a dendrite. |
| T/F: The speed of a nerve impulse depends on the neuron’s resting potential. | False |
| 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. |
| The second largest part of the brain, located just below the posterior portion of the cerebrum, is the | cerebellum. |
| Which cranial nerve is responsible for the sense of smell? | olfactory |
| The effect of sympathetic stimulation on the urinary bladder is | Relaxation |
| _____, a natural constituent of blood, acts as an antithrombin and prevents clots from forming in vessels. | Heparin |
| In the extrinsic pathway of stage 1 of the clotting mechanism, chemicals released from damaged tissues trigger the cascade of events that ultimately result in the formation of | prothrombin activator. |
| _____ is used to determine the volume percentage of red blood cells in whole blood. | Hematocrit |
| The physiological mechanism that dissolves clots is known as | fibrinolysis. |