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What is a sacroplasm?
A sacroplasm is the cytoplasm of inside a skeletal muscle cell.
What neuron conducts impulses away from the cns to muscle glands?
Motor neurons
What substance is released into the sacroplasm reticulum causing muscle relaxation?
calcium ion
Where are the cross bridges involved in muscle contraction?
in the terminal cisternae
What is the difference between a dyad and triad in skeletal cardiac muscle?
In skeletal muscle, a triad is formed when a T-Tubule is flanked on either side by the calcium containing Terminal Cisternae of the Sarcoplasmic Reticulum, at the level of the Z-line. The intimate association of these three membranous sturctures (Terminal Cisternae---T-Tubule---Terminal Cisternae) for a Triad. This differs from a diad (or Dyad), in cardiac muscle where the T-Tubule is only intimately associated with ONE Terminal Cisternae.
The triads of a muscle fiber consist of?
Two terminal cisternae and a T-tubule
Where are the calcium ions stored in the muscle cells?
terminal cisternae of the sarcoplasmic reticulum
What type of fiber Terminal cisternae?
Terminal cisternae are specialized structures found in skeletal muscle fibers that are part of the sarcoplasmic reticulum. They serve as reservoirs for calcium ions, which are essential for muscle contraction. These cisternae are located adjacent to the T-tubules and play a crucial role in the excitation-contraction coupling process by releasing calcium in response to action potentials. Their arrangement helps ensure rapid and coordinated muscle contraction.
Which type of muscle is controlled at will by impulses from the brain?
All muscles are controlled by impulses from the brain. Skeletal muscle is, with few exceptions, the only type of muscle that can be controlled at will.
What does the terminal cisternae of the sarcoplasmic reticulum release?
The terminal cisternae release calcium ions into the muscle cell in response to an action potential. This calcium triggers muscle contraction by binding to troponin, which allows myosin to bind with actin and initiate the sliding filament mechanism.
What is the order of minimum elements in a relax arc?
1. The receptor reacts to a stimulus. 2. The sensory neuron conducts the afferent impulses to the CNS. 3. The integration center consists of one or more synapses in the CNS. 4. The motor neuron conducts the efferent impulses from the integration center to an effector. 5. The effector, muscle fibers or glands, respond to the efferent impulses by contraction or secretion a product, respectively.
What type are of muscle conducts impulses along cellular processes?
Neurons, which are specialized cells in the nervous system, conduct impulses along their cellular processes, known as axons and dendrites. While neurons are not classified as muscle tissue, they play a crucial role in transmitting electrical signals throughout the body, facilitating communication between different parts of the nervous system. In contrast, muscle tissue itself, such as skeletal, cardiac, and smooth muscle, is responsible for contraction and movement, not impulse conduction.
