UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
1. What is being measured in a myogram? - Correct answers✔✔Muscle tension over time
2. What are the three phases of a muscle twitch? - Correct answers✔✔Latent, contraction, and
relaxation
3. During which phase of a muscle twitch does calcium bind to troponin? - Correct
answers✔✔Latent
4. Where on a myogram does the action potential occur? - Correct answers✔✔At the start of the
latent period
5. How are the phases of a muscle twitch related to the steps of contraction? - Correct
answers✔✔Latent = NMJ; Contraction = Crossbridge cycling; Relaxation = Ca²⁺ reuptake
6. What happens to muscle tension when stimulus intensity increases? - Correct
answers✔✔More motor units are recruited, increasing tension
7. Why does muscle tension max out at high voltages? - Correct answers✔✔All motor units are
recruited
8. What happens when stimulus frequency increases? - Correct answers✔✔Wave summation and
tetany occur