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Smooth muscle cells contract in response to environmental stimulation, such as changes in pressure or chemical signals. These involuntary muscle cells are found in various organs, including the intestines and blood vessels, and help regulate functions like digestion and blood flow. Additionally, cardiac muscle cells in the heart also respond to electrical stimuli, contracting rhythmically to pump blood.
What else can I help you with?
What muscle can contract without the need for the nervous stimulation?
Smooth & cardiac muscle.
Weak stimulation of a motor neuron causes the muscle to what?
contract weakly
What kind of muscle cell contract?
Smooth muscle cells contract in response to fluid flow.
Does skeletal muscle need stimulation to contract?
Yes! Although we have total control over these muscles, they still need stimulation to contract. The difference with muscles that we don't control is that we decide if we want to make this stimulation.
What is a graded muscle response?
It is the variation of stimulation needed in skeletal muscle contraction in order to have controlled movement.
Why curare reduces the response to nerve stimulation?
Curare reduces the response to nerve stimulation because it acts as a neuro-muscular blocking agent, or muscle relaxant. It is also known as tubocurarine.
Muscle fibers contract and relax in response to what?
nerve impulses
Skeletal muscles need nerve stimulation for contraction to occur?
Yes, nerve stimulation is necessary for skeletal muscles to contract. This stimulation causes an action potential to travel down the motor neuron, leading to the release of acetylcholine at the neuromuscular junction, which triggers muscle contraction by causing calcium release in the muscle fiber. Without this nerve input, skeletal muscles would not be able to contract voluntarily.
What structure is the effector for the somatic motor stimulation?
The effector for somatic motor stimulation is the skeletal muscle. Somatic motor neurons innervate these muscles, leading to voluntary movements. The motor unit, consisting of a motor neuron and the muscle fibers it innervates, is responsible for muscle contraction in response to somatic motor stimulation.
What is the response to parasympathetic stimulation of the bladder wall muscle?
Parasympathetic stimulation of the bladder wall muscle primarily causes contraction of the detrusor muscle, which facilitates bladder emptying. This contraction increases intravesical pressure, promoting the expulsion of urine. Additionally, parasympathetic stimulation inhibits the internal urethral sphincter, allowing urine to flow from the bladder into the urethra. Overall, this response is crucial for the process of micturition (urination).
Does Electricity causes your muscles to contract?
Yes, electricity can cause your muscles to contract. This occurs because muscle contractions are triggered by electrical signals from the nervous system, which stimulate muscle fibers. When an electrical impulse reaches a muscle, it leads to the release of calcium ions, allowing the muscle fibers to contract. This principle is also utilized in medical therapies and devices, such as electrical stimulation for muscle rehabilitation.
The response of a motor unit to a single action potential of its motor neuron is called?
The response of a motor unit to a single action potential of its motor neuron is called a muscle twitch. This involves the contraction of all the muscle fibers within the motor unit in response to the stimulation from the motor neuron.
