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What substance is released by the nervous system and excites muscle cells?
Acetylcholine is the neurotransmitter released by the nervous system that excites muscle cells, leading to muscle contraction.
Can muscle cells become shorter?
Yes, muscle cells can become shorter through a process called muscle contraction. This happens when the filaments within the muscle cells slide past each other, causing the muscle to contract and shorten.
What passes from the neuron to the muscle cells and what effect does it produce?
Neurotransmitters pass from the neuron to the muscle cells, leading to muscle contraction. This process is known as synaptic transmission, where the release of neurotransmitters triggers a response in the muscle cells by activating receptors on the muscle cell membrane, leading to muscle contraction.
What muscle cells contained cylinders?
Muscle cells that contain cylinders are known as myofibrils, which are the contractile units of muscle fibers. These myofibrils are composed of repeating units called sarcomeres, which contain the actin and myosin filaments responsible for muscle contraction. In skeletal and cardiac muscle cells, these cylindrical structures are organized in a highly structured manner, allowing for efficient contraction and force generation.
What is involved in muscle contraction in larger organisms?
Muscle contraction in larger organisms involves the sliding of actin and myosin filaments in muscle cells, which is triggered by the binding of calcium ions to regulatory proteins. This process leads to the overlap of filaments and shortening of the muscle, producing movement. Nerve impulses stimulate the release of calcium ions and initiate the contraction process in response to a signal from the nervous system.
What cells make you move?
It's muscle cells that carry out the movement, and nerve cells that control the contraction of the muscle cells. Bone cells are also involved indirectly, by providing the framework for the muscles to attach to.
What muscle contains self excitable cells?
The heart muscle contains self-excitable cells known as pacemaker cells. These cells generate electrical signals that control the heart's rhythm by initiating the contraction of the heart muscle.
The force of a muscle contraction is not affected by?
the amount of ATP in the muscle cells
How are cheek cells different from muscle cells?
Skeletal muscle cells are very thin, and lean. They are designed for contraction and expansion.
Muscle tissue consists of cells that are highly specialized for the function of?
Muscle tissue consists of cells that are highly specialized for the function of contraction. These cells contain proteins that allow them to generate force and movement. Muscle tissue can be classified into three types: skeletal, cardiac, and smooth muscle, each with unique properties related to their specific functions.
What energy sources for the contraction of muscle cells?
ATP
What does the contraction of cells in muscle tissue allow muscles to do?
movement
What is the function of t-tubules in muscle contraction?
T-tubules in muscle cells help transmit electrical signals deep into the cell, allowing for coordinated muscle contraction.
What is the function of myotubules in muscle cells?
Myotubules in muscle cells help to transport nutrients and signals within the cell, aiding in muscle growth and contraction.
How do electrolytes play a role in muscle contraction?
Electrolytes help regulate the electrical impulses that control muscle contractions. They maintain the balance of fluids inside and outside of muscle cells, allowing for proper muscle function. When muscles contract, electrolytes like sodium, potassium, and calcium are essential for transmitting signals between nerve cells and muscle cells.
How do T-tubules contribute to the contraction of muscle fibers?
T-tubules are structures in muscle cells that help transmit electrical signals for muscle contraction. They allow for the rapid spread of these signals throughout the cell, ensuring coordinated muscle fiber contraction.
What is the definition for myogenic?
myogenic refers to the contraction of cardiac muscle cells.
