Which of the following describes the force-frequency relationship? As more action potentials reach the muscle per second, a greater amount of calcium will be present in the muscle cell. This is because not all of the calcium released in response to the previous action potential has been taken back up into the sarcoplasmic reticulum. This increase in calcium concentration leads to a more forceful contraction. The amount of overlap between the actin and myosin filaments at the beginning of the contraction determines how forceful the contraction will be. Greater overlap means that more myosin heads have binding sites available on actin filaments, generating a more forceful contraction. Maximal force production for shortening contractions occurs at very low velocities, and force production is very low at high or maximal velocities. Power is the combination of force and velocity. None of these.
Added by Richard M.
Close
Step 1
As more action potentials reach the muscle per second, a greater amount of calcium will be present in the muscle cell. This is because not all of the calcium released in response to the previous action potential has been taken back up into the sarcoplasmic Show moreā¦
Show all steps
Your feedback will help us improve your experience
Madhur L and 62 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Adi S.
Which of the following best describes what happens to the force of the skeletal muscle contraction when stimulation frequency is increased? a. As stimulation frequency increases, the force of muscle contraction remains constant because action potentials are all-or-none. b. As stimulation frequency increases, the force of muscle contraction increases in a linear fashion, because the intensity of a signal is communicated via action potential frequency. c. As stimulation frequency increases, the force of muscle contraction levels off at the height of an individual muscle twitch, because the muscle is not able to relax between stimuli. d. As stimulation frequency increases, the peak tension becomes larger than the force of an individual muscle twitch because twitch peaks become additive as they start to overlap.
Suman K.
Which of the following is the correct sequence involved in skeletal muscle contraction? Select one: a. actin and myosin filament cross bridging, action potential is generated, Ca2+ released from sarcoplasmic reticulum, binding of Ca2+, muscle contracts b. action potential is generated, Ca2+ released from sarcoplasmic reticulum, binding of Ca2+, actin and myosin filament cross bridging, muscle contracts c. Ca2+ released from sarcoplasmic reticulum, action potential is generated, binding of Ca2+, actin and myosin filament cross bridging, muscle contracts d. action potential is generated, actin and myosin filament cross bridging, binding of Ca2+, Ca2+ released from sarcoplasmic reticulum, muscle contracts e. action potential is generated, binding of Ca2+, Ca2+ released from sarcoplasmic reticulum, actin and myosin filament cross bridging, muscle contracts
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
200,000+
Students learning Biology with Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD
