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That depends entirely upon the receptor that norepinephrine activates.
- alpha-1 receptors will induce smooth muscle contraction in response to norepinephrine. This is seen in blood vessels, splenic capsule, the uterus, the prostate, the radial muslces of the iris, the trigone of the bladder, the ureters, hair folicles, nasal secretion and metaarteriolar sphincter tone, salavary gland secretion, & sweat gland secretion.
- alpha-2 receptors will act to inhibit smooth muscle contraction in response to norepinephrine. This is seen in the smooth muscle of the gastrointestinal tract.
- beta-1 receptors stimulation by norepinephrine results in cardiac muscle (myocardium) contraction when stimulated by norepinephrine. This activity is seen in the heart; however, these receptors are also noted in the kidney with renin secretion.
- beta-2 receptors will relax smooth muscle with activated by norepinephrine. This is seen with bronchial dilation, cilliary muscle dilation in the eye, detrussor muscle relaxation, blood vessel dilation, & uterine dilation.
What else can I help you with?
Which type of muscle ca be stimulated by norepinephrine?
smooth muscle
What can acetylcholine and norepinephrine affect?
Smooth Muscle Cells
The two neurotransmitters that affect smooth muscle cells are acetylcholine and?
norepinephrine. Acetylcholine mainly causes smooth muscle contraction, while norepinephrine can either cause contraction or relaxation depending on the type of receptor it binds to on the smooth muscle cell.
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.
All of these neurons release acetylcholine as a neurotransmitter except?
specific cardiac and smooth muscle fibers
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.
is a neurotransmitter vasoconstrictor and smooth muscle stimulant?
Yes, certain neurotransmitters can act as vasoconstrictors and stimulate smooth muscle. For example, norepinephrine primarily released from sympathetic nerve endings can cause vasoconstriction by binding to alpha-adrenergic receptors on smooth muscle cells in blood vessels. This action leads to increased vascular resistance and reduced blood flow to certain areas. Other neurotransmitters, such as angiotensin II, also have similar effects on smooth muscle contraction and vasoconstriction.
One of the neurotransmitters of the sympathetic nervous system that increases the heart rate and constricts smooth muscle in blood vessels to raise blood pressure in the fight or flight response is?
Norepinephrine.
What causes arterioles to dilate in response to increased sympathetic tone?
Increased sympathetic tone leads to the release of norepinephrine, which binds to alpha-1 adrenergic receptors on arteriolar smooth muscle. This binding initiates a signaling cascade that ultimately results in the relaxation of the smooth muscle, causing the arterioles to dilate.
What is the muscle that is found in the small intestine?
smooth musclesmooth muscle
Is an ulcer a cardiac muscle or a smooth muscle?
Smooth muscle
How does sympathetic activation affect the constriction of blood vessels?
Sympathetic activation causes blood vessels to constrict by releasing a neurotransmitter called norepinephrine, which binds to receptors on the smooth muscle cells of the blood vessels. This binding triggers a series of events that ultimately lead to the contraction of the smooth muscle, resulting in the narrowing of the blood vessels.
