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Which cells have long fibers that can contract and relax?
Muscle cells can contract and relax and lave fibers as long as 1.5 feet.
What cells have fibers that can contract and relax?
Muscle cells have fibers that can contract and relax. These fibers, known as myofibrils, contain the proteins actin and myosin that allow them to slide past each other and generate force. This contraction and relaxation of muscle fibers enable movement in the body.
What usually triggers muscle fibers to contract or relax?
The contraction is triggered by the release of calcium within the muscle which is triggered by an electrical signal from a nerve.
Are there fibers in the esophagus?
Yes, the esophagus is lined with a layer of smooth muscle fibers that help transport food from the mouth to the stomach through a process known as peristalsis. These muscle fibers contract and relax to push food downward.
Which of these are tissues that can relax and contract?
Smooth muscle tissues can relax and contract. Additionally, cardiac muscle tissues also have the ability to relax and contract. Skeletal muscle tissues are another type that can relax and contract voluntarily.
The ability of a muscle to contract and relax is dependent on the flow of what?
The ability of a muscle to contract and relax is dependent on the flow of calcium ions. When a muscle is stimulated, calcium is released from storage sites within the muscle cell, allowing the muscle fibers to slide past each other and generate force. Removal of calcium from the muscle cell leads to relaxation of the muscle.
What causes muscles to contract and relax?
Muscles contract in response to signals from motor neurons that release the neurotransmitter acetylcholine. This triggers a series of events that lead to the sliding of actin and myosin filaments within muscle fibers, causing them to contract. Relaxation occurs when these filaments slide back to their original position after the stimulation stops.
What is the organ system composed of tissue that can relax and contract?
The organ system composed of tissue that can contract and relax is muscle tissue.
What muscle is slow to contract and relax?
cardiac
What are the smooth muscle fibers called that support the lens?
The smooth muscle fibers that support the lens in the eye are called ciliary muscles. These muscles contract and relax to change the shape of the lens, allowing for accommodation and focusing on objects at different distances.
What are contractile fibers?
Contractile fibers are specialized muscle fibers responsible for the contraction and movement of muscles. They contain proteins like actin and myosin, which interact to produce force during muscle contraction. These fibers are found in various types of muscle tissue, including skeletal, cardiac, and smooth muscle, each serving distinct functions in the body. Their ability to contract and relax is essential for various bodily movements and functions.
What is an example of a tissue in your body?
One example of a tissue in the human body is muscle tissue, which is responsible for body movement and generating force. Muscle tissue is composed of muscle fibers that contract and relax to produce motion.
