In an experiment, it was determined that the motor (effector) neuron for muscle fibre 1 had a threshold level of –5 mV. The motor (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? Select one: a. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Contracted Relaxed b. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Relaxed Contracted c. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Relaxed Contracted d. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Contracted Relaxed
In an experiment, it was determined that the motor (effector) neuron for muscle fibre 1 had a threshold level of –5 mV. The motor (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? Select one: a. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Contracted Relaxed b. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Relaxed Contracted c. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –10 mV Relaxed Contracted d. Stimulus Voltage Muscle Fibre 1 Muscle Fibre 2 –20 mV Contracted Relaxed
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
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In an experiment, it was determined that the motor (effector) neuron for muscle fibre 1 had a threshold level of –5 mV. The motor (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?
Select one:
a.
| Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
|---|---|---|
| –10 mV | Contracted | Relaxed |
b.
| Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
|---|---|---|
| –20 mV | Relaxed | Contracted |
c.
| Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
|---|---|---|
| –10 mV | Relaxed | Contracted |
d.
| Stimulus Voltage | Muscle Fibre 1 | Muscle Fibre 2 |
|---|---|---|
| –20 mV | Contracted | Relaxed |
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