(a)
To draw: The neuronal circuit representing the reflex that pulls the hand when the finger is pricked and, label the neurons, direction of information flow and location of synapses.
Introduction:
The body involuntarily reacts to a stimulus through reflex action. It includes the signals carried by nerve cells from receptor organs to the central nervous system (CNS) and then back to effector organs. Afferent (sensory) neurons carry information to CNS (brain or spinal cord), and efferent (motor) neurons carry information back to effector. It forms a neuronal circuit. In some cases, interneurons are present that relay signals between sensory or motor neurons and CNS.
(b)
To draw: Brain diagram indicating the area where the pain would be perceived.
Introduction:
The body involuntarily reacts to a stimulus through reflex action. It includes the signals carried by nerve cells from receptor organs to the central nervous system (CNS) and then back to effector organs. Afferent (sensory) neurons carry information to CNS (brain or spinal cord), and efferent (motor) neurons carry information back to effector. It forms a neuronal circuit. In some cases, interneurons are present that relay signals between sensory or motor neurons and CNS.
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EBK CAMPBELL BIOLOGY
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- Gray matter in the spinal cord seems that color because the cells are dead O contains the myelinated axons of motor neurons O contains the cell bodies and myelinated axons of sensory neurons contains the cell bodies of motor neuronsarrow_forwardYou accidentally place your hand on a hot surface. You immediately pull your hand away and then feel the burning sensation and pain from the burn you just received. Explain why, based on the structure of the nervous system, it takes longer to feel the pain than it does to move your hand away from the dangerous stimulusarrow_forwardLabel on the diagram: 1. Muscle spindle 2. Sensory neuron 3. Soma of sensory neuron 4. Dorsal root 5. Dorsal root ganglion 6. Dorsal horn 7. Ventral horn 8. Motor neuron to quad 9. Motor neuron to biceps 10. Excitatory synapse 11. Inhibitory synapse What is the name of this reflex? e20SPm idton, How many neurons are Tap your partner's patellar ligament to test their reflexes and try tapping the belly of the brachioradialis muscle to see what happens. involved?arrow_forward
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- You and your lab partner have prepared a frog nerve for gathering data on action potentials. You connect an electronic stimulator to the nerve and ask your partner to gradually increase the voltage until you see an action potential. Your partner says that the voltage knob is stuck and will not increase the voltage. To finally get an action potential, they begin to trouble shoot and instead of increasing the voltage, they begin to simulate the nerve over and over again and see an action potential. What type of summation is this describing? action potentials graded potentials spatial summation temporal summation O thresholdarrow_forwardSometimes you have lighting fast reflexes to protect yourself from a further dangerous situation – burning your hand, stepping on a nail or broken glass, etc. Okay, the situation or stimulus might not always we dangerous such as when the doctor checks your patellar reflex with their hand or rubber mallet. Explain the neurons involved in a reflex arc and how they trigger a reflex action in response to a stimulus.arrow_forwardHi, Descending pathway that inhibit pain stimulates inhibitory interneueons in the spinal cord. True or False?arrow_forward
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