0
Oxytocin is a hormone that stimulates smooth muscle contraction, particularly in the uterus during childbirth and in the mammary glands during breastfeeding. It is produced in the hypothalamus and released by the posterior pituitary gland. Additionally, other hormones like prostaglandins also play a role in promoting smooth muscle contractions in various physiological processes.
What else can I help you with?
A maximal sustained muscle contraction is called a?
tetanic contraction.
What stimulates contractions in uterine smooth muscle during labor?
During labor, the hormone oxytocin plays a key role in stimulating contractions in uterine smooth muscle. Oxytocin is released from the mother's pituitary gland in response to the stretching of the cervix and uterus, as well as other factors such as emotional cues. Additionally, prostaglandins are also involved in the process by increasing the sensitivity of the uterine muscle to oxytocin.
In smooth muscle the calcium needed for contraction comes mainly from?
In smooth muscle, the calcium needed for contraction primarily comes from the extracellular space. When smooth muscle cells are stimulated, calcium channels in the cell membrane open, allowing calcium ions to flow into the cell. Additionally, some calcium can also be released from the sarcoplasmic reticulum, but the extracellular influx is the main source for initiating contraction. This influx of calcium activates the contraction process by interacting with calmodulin and subsequently activating myosin light chain kinase.
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.
What does a smooth endoplasmic reticulum do in a plant cell do?
The smooth endoplasmic reticulum is a vast network of membrane-bound vesicles and tubules. It does the following: 1. lipid and steroid hormone synthesis 2. breakdown of lipid-soluble toxins in liver cells 3. control of calcium release in muscle cell contraction
What stimulates the smooth muscle of the uterus?
Stimulation of the cervix is what triggers labor through a hormone called oxytocin.
What of the muscle tissue can sustain longer contraction?
smooth muscle
A maximal sustained muscle contraction is called a?
tetanic contraction.
What conditions cause contractions of arteriole smooth muscle?
Asthma causes contraction of the bronchial smooth muscle.
What are the muscles that are slow in contraction and relaxation?
smooth muscle
What does noradrenaline do?
It can cause vascular smooth muscle contraction
Why is the endothelium smooth?
Because it is an involuntaru muscle contraction
What is the type of contraction that Peristalsis is seen in?
smooth muscle
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.
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 refers to the rythmic wave of contraction of smooth muscle?
Peristalsis
Dense bodies are characteristic of?
Dense bodies are characteristic of smooth muscle cells. These structures help anchor actin filaments in the cell and facilitate muscle contraction by linking adjacent cells. Dense bodies play a crucial role in the mechanical coordination of smooth muscle contraction.
