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Auntonomic efferents from the vagus (X) nerve
GI motility and the release of GI secretion are carefully regulated by the enteric nervous system, which is often referred to as the "second brain," as well as by various hormones such as gastrin, secretin, and cholecystokinin. These regulatory mechanisms ensure that digestion and absorption of nutrients occur efficiently and effectively in the gastrointestinal tract. Any disruption in this regulation can lead to gastrointestinal disorders.
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Does parasympathetic stimulation of the intestine increase or decrease motility and increase or decrease digestive gland secretion?
Parasympathetic stimulation of the intestine increases motility by promoting smooth muscle contractions and enhances digestive gland secretion by stimulating the release of digestive enzymes and fluids.
What does gastrin stimulate?
Gastrin is a hormone secreted by the stomach which stimulates the secretion of hydrochloric acid, increase motility, and stomach emptying.
Is acth secretion regulated by a hypothalamic secretion?
Yes, ACTH secretion is regulated by corticotropin-releasing hormone (CRH) produced by the hypothalamus. CRH stimulates the release of ACTH from the pituitary gland, which in turn stimulates the adrenal glands to produce cortisol. This pathway is part of the hypothalamic-pituitary-adrenal (HPA) axis that plays a key role in the body's response to stress.
What is insulin primarily regulated by?
Insulin secretion is primarily regulated by blood glucose levels. When blood glucose levels rise after a meal, beta cells in the pancreas release insulin to help cells uptake glucose for energy production.
How is the secretion of salivary amylase regulated?
The secretion of salivary amylase is primarily regulated by the nervous system, specifically through the parasympathetic nervous system. Stimuli such as sight, smell, and taste of food can trigger the release of saliva and amylase. Additionally, the presence of food in the mouth activates receptors on the tongue and oral mucosa that signal the salivary glands to produce and secrete amylase.
What is GI motility and the release of GI secretions carefully regulated by?
Auntonomic efferents from the vagus (X) nerve
Does parasympathetic stimulation of the intestine increase or decrease motility and increase or decrease digestive gland secretion?
Parasympathetic stimulation of the intestine increases motility by promoting smooth muscle contractions and enhances digestive gland secretion by stimulating the release of digestive enzymes and fluids.
What does gastrin stimulate?
Gastrin is a hormone secreted by the stomach which stimulates the secretion of hydrochloric acid, increase motility, and stomach emptying.
Is acth secretion regulated by a hypothalamic secretion?
Yes, ACTH secretion is regulated by corticotropin-releasing hormone (CRH) produced by the hypothalamus. CRH stimulates the release of ACTH from the pituitary gland, which in turn stimulates the adrenal glands to produce cortisol. This pathway is part of the hypothalamic-pituitary-adrenal (HPA) axis that plays a key role in the body's response to stress.
What is insulin primarily regulated by?
Insulin secretion is primarily regulated by blood glucose levels. When blood glucose levels rise after a meal, beta cells in the pancreas release insulin to help cells uptake glucose for energy production.
How is the secretion of salivary amylase regulated?
The secretion of salivary amylase is primarily regulated by the nervous system, specifically through the parasympathetic nervous system. Stimuli such as sight, smell, and taste of food can trigger the release of saliva and amylase. Additionally, the presence of food in the mouth activates receptors on the tongue and oral mucosa that signal the salivary glands to produce and secrete amylase.
What hormones control the secretion of FSH?
Follicle-stimulating hormone (FSH) secretion is primarily regulated by gonadotropin-releasing hormone (GnRH) from the hypothalamus. GnRH stimulates the release of FSH from the anterior pituitary gland. Additionally, negative feedback from sex steroids such as estrogen and testosterone can also influence FSH secretion.
What is hormone secretion?
Endocrine glands secrete hormones.
What is the release of the process called?
Secretion
How Hormonal Secretions Are Regulated?
Most hormone secretions are regulated by negative feedbacks. The 3 main feed backs are:1)(Blood level of certain chemicals controls hormone secretion) Blood composition; Ex: blood glucose levels control the insulin secretion.2)(Hormones controlled by nervous system) Neural control; Ex: Epinephrine is release from adrenal medulla as result of nervous system stimulation.3)(Hormone secretion controlled by other hormones) Hormonal control; Ex: hormones from pituitary gland act on the ovaries and testes causing release of sex hormones.Source: Seeley's Essentials of Anatomy and Physiology (seventh edition)
What is the process of hormone release called?
Secretion
Is secretion the same as absorption?
No, secretion and absorption are different processes. Secretion is the release of substances from a cell or gland, while absorption is the uptake of substances into a cell or the body.
