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What test makes use of a special hammer?
DTR testing or deep tendon reflex testing uses a reflex hammer to strike the tendon in an extremity checking for a response or the absence of a response when the muscle is stimulated by the hammer.
What special feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction?
stress-relaxation responsestress-relaxation response
What is the role of the functional unit of a muscle in the process of muscle contraction?
The functional unit of a muscle is the sarcomere, which is responsible for muscle contraction. Within the sarcomere, actin and myosin filaments slide past each other, causing the muscle to shorten and generate force. This process is essential for movement and muscle function.
In response to a muscle being overstretched a muscle spindle generates a somatic spinal reflex that ultimately causes what response?
Both contaction of the agonist muscle and relaxation of the antagonist muscle
What is the functional unit of muscle?
sarcomeres
What is the functional unit of a muscle called?
Sarcomere
How is the all-or-none response related to the strength of a muscle contraction?
The all-or-none response means that a muscle fiber contracts fully or not at all in response to a stimulus. The strength of a muscle contraction is determined by the number of muscle fibers that are recruited to contract, rather than the degree of contraction of individual muscle fibers. Therefore, the all-or-none response influences the overall strength of a muscle contraction by determining how many muscle fibers are activated.
What is the relationship between amplitude of muscle response and voltage of stimulus applied?
The relationship between the amplitude of muscle response and the voltage of the stimulus is generally linear. As the voltage of the stimulus increases, the muscle response increases in amplitude up to a certain point. Beyond that point, further increases in voltage may not significantly increase the muscle response amplitude or could lead to muscle fatigue or damage.
The structural and functional unit of skeleton muscle is called?
sarcomere
The smallest functional unit of the muscle fiber?
The smallest functional unit of a muscle fiber is the sarcomere. Sarcomeres are composed of actin and myosin filaments arranged in a repeating pattern, allowing for muscle contraction and relaxation to occur. They are responsible for the striated appearance of skeletal muscle under a microscope.
Do smooth or skeletal muscle form a functional syncytium?
Smooth muscle forms a functional syncytium due to the presence of gap junctions that allow electrical signals to pass from one cell to the next, enabling coordinated contractions. Skeletal muscle, on the other hand, does not form a functional syncytium as each skeletal muscle cell (fiber) is innervated individually by a motor neuron and must be stimulated independently.
What type of muscle whose functional characteristics most closely resemble those of an individual muscle fiber?
Parallel
