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What condition results from relaxation of the smooth muscle in a blood vessel wall?
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What are the muscles that are slow in contraction and relaxation?
smooth muscle
When contraction of the smooth muscle in a blood vessel wall results in the vessel is referred to as being in a condition of?
vasoconstriction
What does vasodilation in the skin and viscera result from?
Vasodilation in the skin and viscera results from the relaxation of smooth muscle cells in blood vessels. This relaxation causes the blood vessels to widen, increasing blood flow to the skin and internal organs. Vasodilation helps regulate body temperature and can occur in response to various stimuli like heat, exercise, or injury.
The alternating contraction and relaxation of opposing layers of smooth muscle is referred to as?
Peristalsis
What special feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction?
stress-relaxation responsestress-relaxation response
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 relaxation of the smooth muscle in the artery wall which causes the artery wall to become larger?
Vasodilation
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.
What A musculotropic substance acts on what?
A musculotropic substance acts on muscle tissue. It specifically targets and affects smooth muscle cells, resulting in changes to muscle contraction and relaxation.
Why artery called resistance vessels?
The contraction and relaxation of the smooth muscle in their walls can change their diameter, thus changing the level of pressure (large diameter yields low pressure and smaller diameter yields high pressure).
What controls your smooth muscle?
Smooth muscle is controlled by the autonomic nervous system, which includes both sympathetic and parasympathetic divisions. The sympathetic nervous system typically causes smooth muscle contraction, while the parasympathetic nervous system usually promotes relaxation of smooth muscle. Additionally, hormones and local factors can also influence the contraction and relaxation of smooth muscle.
What is in the sarcoplasmic reticulum in muscle?
The sarcoplasmic reticulum is a special type of smooth endoplasmic reticulum. It releases calcium ions during muscle contraction and absorbs them during relaxation.
