Sliding filament mechanism
it is tiny muscle fibers that contract and expand the muscle
Fast-twitch muscle fibers.
When a single neuron sends a strong enough impulse to a muscle, it can cause multiple muscle fibers within that muscle to contract. The specific number of muscle fibers that contract will depend on factors like the size of the motor unit and the intensity of the signal from the neuron.
Muscle cells can contract and relax and lave fibers as long as 1.5 feet.
No, intrafusal fibers don't contract.
Yes, glycerinated skeletal muscle fibers still require calcium in order to contract. The glycerination process maintains the basic structure of the muscle fibers but removes cellular components, allowing for the fibers to contract in response to calcium in a controlled laboratory setting.
ATP is required for muscle contraction because it provides the energy needed for the muscle fibers to contract and generate force. Without ATP, the muscle fibers would not be able to move and contract effectively.
There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.
nerve impulses
False
False
Muscle fibers contract to generate force and produce movement in the body. They are responsible for actions such as lifting objects, running, and even maintaining posture. Additionally, muscle fibers play a vital role in regulating body temperature and supporting various bodily functions.