it will not respond until it reaches the threshold level
When a weak stimulus is applied to a muscle fiber, only a few motor units are recruited to contract. This results in a partial muscle contraction where not all muscle fibers are activated. Stronger stimuli recruit more motor units, leading to a full muscle contraction.
The all-or-none law applies to individual muscle fibers within a skeletal muscle. This means that when a muscle fiber is stimulated by a motor neuron, it will either contract maximally or not at all, depending on whether the stimulus reaches the threshold for activation.
A twitch contraction is a single, brief contraction of a muscle fiber in response to a stimulus. It is the smallest unit of muscle contraction and is not strong enough to produce movement of a limb.
The two structures closely associated at the neuromuscular junction are the motor neuron and the muscle fiber. The motor neuron releases the neurotransmitter acetylcholine, which binds to receptors on the muscle fiber, initiating muscle contraction.
The absolute refractory period for skeletal muscles is about 1 to 2 milliseconds. During this time, the muscle fiber is unable to respond to a new stimulus, no matter how strong it is. This period ensures the muscle has enough time to recover before being stimulated again.
acetylcholine
all-or-none law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is not dependent on the strength of the stimulus. If the stimulus is any strength above threshold, the nerve or muscle fiber will give a complete response or otherwise no response at all
When a weak stimulus is applied to a muscle fiber, only a few motor units are recruited to contract. This results in a partial muscle contraction where not all muscle fibers are activated. Stronger stimuli recruit more motor units, leading to a full muscle contraction.
The all-or-none law applies to individual muscle fibers within a skeletal muscle. This means that when a muscle fiber is stimulated by a motor neuron, it will either contract maximally or not at all, depending on whether the stimulus reaches the threshold for activation.
Threshold stimulus is defined as the minimum level of stimulus intensity that is required to trigger a response in a neuron or muscle fiber. This level must be reached for action potentials to be generated, leading to muscle contraction or nerve signal transmission. If the stimulus is below this threshold, no response occurs, highlighting the all-or-nothing principle of action potentials.
A twitch contraction is a single, brief contraction of a muscle fiber in response to a stimulus. It is the smallest unit of muscle contraction and is not strong enough to produce movement of a limb.
a twitch is a single stimulus-contraction-relax action sequence in a muscle fiber. They can vary in duration depending on the type of muscle, it's location, internal and external enviromental conditions and other factors.
The two structures closely associated at the neuromuscular junction are the motor neuron and the muscle fiber. The motor neuron releases the neurotransmitter acetylcholine, which binds to receptors on the muscle fiber, initiating muscle contraction.
The absolute refractory period for skeletal muscles is about 1 to 2 milliseconds. During this time, the muscle fiber is unable to respond to a new stimulus, no matter how strong it is. This period ensures the muscle has enough time to recover before being stimulated again.
A single muscle cell is called a muscle fiber.
Electrical excitation of a muscle fiber. Skeletal muscle fibers (cells) can be stimulated either by amotor neuron in the body or by a voltage stimulator in the lab. Stimulation given by either method results in a depolarization of the sarcolemma. If the depolarization reaches threshold, an action potential (electrical signal) is initiated.
Each muscle fiber is also called a myofiber.