Hormone Secretion
Hormone Secretion - Related Videos
01:19
Regulation of Hormone Secretion
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2024
Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction. Humoral stimuli,...
01:25
Hormones Secreted by the Stomach
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2024
Enteroendocrine cells, accounting for only 1% of stomach epithelial cells, play a significant role in digestion and are classified by their digestive hormone secretions. Each of these hormones secreted by different enteroendocrine cells plays a unique role in digestion. Here are a few examples: Gastrin: The G cells secrete gastrin, a hormone that stimulates the production of gastric acid and enzymes. It enhances the contraction of stomach muscles, facilitating food movement through the...
06:53
Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures
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Cited by 19 •
2016
Here, we describe settings to monitor in parallel circadian bioluminescence and the secretory activity of human islet cells and primary myotubes. For this, we employed lentiviral gene delivery of a luciferase core clock reporter, followed by in vitro synchronization and collection of outflow medium by continuous cell perifusion.
02:13
Types of Hormones
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2019
Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells. Steroid hormones are derived from cholesterol and are lipophilic in nature. This allows them to readily traverse the lipid-rich cell membrane to bind to their intracellular receptors in the cytoplasm or nucleus. Once bound, the cytoplasmic hormone-receptor complex translocates to the nucleus.
07:00
Mechanisms Underlying Gut Hormone Secretion Using the Isolated Perfused Rat Small Intestine
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Cited by 13 •
2019
Here, we present a powerful and physiological model to study the molecular mechanisms underlying gut hormone secretion and intestinal absorption — the isolated perfused rat small intestine.
FAQs
Neural input and shifts in the internal environment can act as distinct initiating signals for secretory cells or neuroendocrine neurons. These cues influence whether hormones are newly synthesized, mobilized from existing stores, or released through calcium-dependent exocytosis. The type and timing of the initiating stimulus therefore help determine how endocrine communication is coordinated with changing physiological conditions.
Calcium-dependent exocytosis provides a regulated route for releasing stored chemical messengers from secretory cells. Calcium links an activating signal to the release event, allowing secretion to respond to neural or environmental input rather than occurring continuously. This mechanism helps control when a hormone enters communication pathways and supports changes in signal strength across tissues.
Receptors detect hormonal signals in responsive tissues, while feedback loops regulate the secretory system that produced them. Together, these controls help prevent signals from becoming unnecessarily strong or prolonged. Their activity determines how effectively communication is maintained or reduced, making receptor responses and feedback especially important when studying coordinated endocrine and neural regulation.
Both endocrine cells and neuroendocrine neurons can release hormones, but their secretory activity links different sources of regulation. Neural input can influence neuroendocrine signaling, while endocrine cells respond to changes in the internal environment. Examining both cell types clarifies how nervous-system information and tissue conditions converge to coordinate communication across the body.
A neuroscience-focused analysis follows communication among the hypothalamus, pituitary gland, and peripheral organs. Researchers consider the initiating neural or internal stimulus, the resulting secretory response, receptor activity, and feedback regulation across this pathway. This systems-level approach helps relate local release events to coordinated effects on tissues and to changes in neural activity.
Investigating hormone secretion can illuminate how signaling contributes to stress, metabolism, reproduction, sleep, and behavior. These areas connect endocrine communication with neural activity and organism-wide regulation. Comparing secretion patterns and feedback control across such functions can also reveal how disturbances in signaling relate to endocrine and neurological disorders.
Abnormal secretion can disrupt communication between the hypothalamus, pituitary gland, peripheral organs, and neural systems. Studying these disruptions helps identify whether altered signaling, receptor responses, or feedback control contributes to a disorder-related mechanism. This perspective connects endocrine abnormalities with changes in neural activity and provides context for investigating neurological as well as endocrine conditions.