Question

8. The table below shows the relationship between stimulus voltage and tension developed. a. At what voltage does the muscle reach threshold voltage? At what voltage does the muscle start to have its strongest contraction? b. As you increase voltage, what is occurring in the sciatic nerve to produce stronger muscle contractions? What is the name for this event? c. Where does the "voltage" originate from in the human body? (3 points) Tension Developed (g) Stimulus Voltage (mV) 0.05 0.1 0 0.15 7.32 0.2 8.45 0.25 15.2 0.3 20.3 0.35 21.4 0.4 21.1 0.45 21.2 0.5 9. The figure below shows the relationship between muscle length and percent of maximum muscle tension 100 is ontimal lenath of the sarcomerel Answer the followina auestions reaardina the ficure

Answer 1

8) a. Threshold voltage - It is the minimum voltage required in a nerve conduction. At 0.05mV the muscle will reach threshold voltage.

At maximum recruitment voltage in nerve conduction, the muscle will have strongest contractions.

The voltage continues to increase until the muscle contracts maximally(muscles are tensed).

b. In electrically initiated contraction the muscle produce strongest contractions

Largest diameter (larger fast twitch type II) are activated first.

-Produce strongest and quickest contractions.

-Fatigue rapidly and atrophy quickly

-Rapid, jerky onset contractions

c. Positive and negative ions / electrolyte potential difference originates voltage in the human body .