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BMS 250 Lab
Lab 8
| Term | Definition |
|---|---|
| Why do you see spots when pressing on your eye in the dark? | pushing your eye forces gated ion channels to open and produce an electrical signal which you then perceive the touch as light |
| Why are you able to perceive the differences in sweetness between two fructose solutions of different concentrations? | a bigger stimulus (more sweetness/fructose) would cause a greater frequency of action potentials; more molecules, more binding to receptors, more action potentials |
| Phasic receptors | fast adapting receptors that generate a burst of action potentials when initially stimulated and then quickly adapt by reducing or stopping the generation of action potentials even though the stimulus is still present |
| Tonic receptors | slow adapting receptors that continue generating action potentials over time; respond continuously to stimuli at a constant rate |
| What type of receptors are thermoreceptors? | phasic receptors |
| The smaller the receptive field, the____ the area of the primary somatosensory cortex dedicated to that receptive field | larger |
| What type of reflex is the stretch/knee jerk reflex? | monosynaptic |
| Stretch/knee jerk reflex arc: tap on patellar ligament excites nerve endings of.... QF= quadriceps femoris SC=spinal cord | muscle spindle in QF, stretch signals travel to SC by sensory fiber &dorsalroot, primarysensoryneuron stimulates alphamotorneuron in SC, motorsignals in nervefiber stimulate QF to contract-kneejerk, sensorynervefibers stimulate inhibitorymotorneuron in SC |
| What receptor was activated in the elicitation of the stretch/knee jerk reflex? | muscle spindle |
| What type of nerve is the femoral nerve? | mixed |
| 5 basic components of a reflex arc | receptor, sensory/afferent neuron, interneuron/association neuron, motor/efferent neuron, effector |
| In general, what type of information is sent through the posterior (dorsal) root? | sensory information |
| In general, what type of information is sent through the anterior (ventral) root? | motor information |
| Adaptation | decrease in action potential over time even though stimulus is still present |
| Where in the brain is the signal for taste processed? | insula |
Created by:
kkade
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