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All of these neurons release acetylcholine as a neurotransmitter except?
specific cardiac and smooth muscle fibers
What does acetylcholine do to bronchioles?
Acetylcholine causes bronchoconstriction by binding to muscarinic receptors on smooth muscle in the bronchioles, leading to narrowing of the airways. This can result in difficulty breathing and decreased airflow to the lungs.
Can you see sarcomeres in smooth muscle?
No, sarcomeres are not visible in smooth muscle. Smooth muscle lacks the organized sarcomere structure found in striated muscle, such as skeletal and cardiac muscle. Instead, smooth muscle has a more scattered arrangement of contractile proteins.
Does the trachea have skeletal muscle?
No, the trachea does not have skeletal muscle. Instead, it is composed of smooth muscle, cartilage, and connective tissue. Smooth muscle allows for involuntary control of the trachea's diameter and airflow.
How does the contraction mechanism of smooth muscle compare to that of skeletal muscle and cardiac muscle?
Smooth muscle, skeletal muscle, and cardiac muscle all contract in response to signals from the nervous system or hormones. However, the contraction mechanism of smooth muscle is different from that of skeletal and cardiac muscle. Smooth muscle contracts more slowly and can sustain contractions for longer periods of time compared to skeletal and cardiac muscle. Additionally, smooth muscle does not have striations like skeletal and cardiac muscle, which gives it a more uniform appearance.
What can acetylcholine and norepinephrine affect?
Smooth Muscle Cells
Which muscle contraction does acetylcholine and norepinephrine affect?
Acetylcholine and norepinephrine both affect smooth muscle contraction. They stimulate contraction in some muscles and inhibits contraction in others.
What are the two neurotransmitters that affect smooth muscle cells?
The main neurotransmitters involved with smooth muscle is Acetylcholine which causes an exited effect in smooth tissue and Adrenalin which causes an inhibitory effect. Adrenalin is produced by the adrenal gland when animals are in high stress or phsically elated situations. This causes the "flight or fight" mode in animals and increases function of regions of body necessary for survial such as skeletal muscle. Thus smooth muscle in the gut for example isn't vital in dangers situations therefore contraction of this muscle is decreased by the neurotransmitter.
What Neurotransmitter diffuses across a synapse to a muscle cell?
It varies: In the somatic system (skeletal muscle) and parasympathetic branch of the autonomous nervous system (smooth & cardiac muscle) it is usually acetylcholine. In the sympathetic branch of the autonomous nervous system (smooth & cardiac muscle) it is usually norepinephrine (also called noradrenaline). There are exceptions, but this is the general rule.
All of these neurons release acetylcholine as a neurotransmitter except?
specific cardiac and smooth muscle fibers
A drug that decreases peristalsis would be one that?
A drug that decreases peristalsis would likely be an anticholinergic medication, which blocks the action of acetylcholine in the gastrointestinal tract. This inhibition can slow down the contractions of the smooth muscle in the intestines, reducing peristalsis.
What does acetylcholine do to bronchioles?
Acetylcholine causes bronchoconstriction by binding to muscarinic receptors on smooth muscle in the bronchioles, leading to narrowing of the airways. This can result in difficulty breathing and decreased airflow to the lungs.
What is the neurotransmitter that initiates muscle contraction?
Voluntary muscle contraction is controlled by the central nervous system. The brain sends signals, in the form of action potentials, through the nervous system to the motor neuron that innervates several muscle fibers.Acetylcholine (ACh) is commonly secreted at neuromuscular junctions, the gaps between motor neurons and muscle cells, where it stimulates muscles to contract (by opening gated positive ion channels).
Why does Acetylcholine decrease the frequency in cycles of the smooth muscles?
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What is the muscle that is found in the small intestine?
smooth musclesmooth muscle
What does acetycholine do to muscles?
Acetylcholine acts to excite skeletal muscles, allowing for the muscle to contract. It also serves to allow contractions in the smooth muscles, while slowing down the cardiac muscles
Is an ulcer a cardiac muscle or a smooth muscle?
Smooth muscle
