n effector neuron is a motor neuron that transmits impulses from the CNS to an effector (muscle or gland). In an experiment, it was determined that the effector neuron for muscle fibre 1 had a threshold level of –5 mV. The effector neuron for muscle fibre 2 had a threshold level of –16 mV. An electrical probe was used to stimulate these two effector neurons of the muscle fibres. Which of the following rows correctly identifies the reaction of each muscle fibre based on the applied stimulus voltage? Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Relaxed Contracted b.
n effector neuron is a motor neuron that transmits impulses from the CNS to an effector (muscle or gland). In an experiment, it was determined that the effector neuron for muscle fibre 1 had a threshold level of –5 mV. The effector neuron for muscle fibre 2 had a threshold level of –16 mV. An electrical probe was used to stimulate these two effector neurons of the muscle fibres. Which of the following rows correctly identifies the reaction of each muscle fibre based on the applied stimulus voltage? Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Relaxed Contracted b.
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Lauralee Sherwood
Chapter7: The Peripheral Nervous System: Efferent Division
Section: Chapter Questions
Problem 9RE
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An effector neuron is a motor neuron that transmits impulses from the CNS to an effector (muscle or gland).
In an experiment, it was determined that the effector neuron for muscle fibre 1 had a threshold level of –5 mV. The effector neuron for muscle fibre 2 had a threshold level of –16 mV.
An electrical probe was used to stimulate these two effector neurons of the muscle fibres.
Which of the following rows correctly identifies the reaction of each muscle fibre based on the applied stimulus voltage?
Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
---|---|---|
–20 mV | Relaxed | Contracted |
b.
Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
---|---|---|
–20 mV | Contracted | Relaxed |
c.
Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
---|---|---|
–10 mV | Contracted | Relaxed |
d.
Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
---|---|---|
–10 mV | Relaxed | Contracted |
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