Calcium Homeostasis
Calcium Homeostasis - Related Videos
01:21
Skeleton and Calcium Homeostasis
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2023
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
08:41
Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP
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Cited by 8 •
2015
Endoplasmic reticulum calcium homeostasis is disrupted in diverse pathologies. A secreted ER calcium monitoring protein (SERCaMP) reporter can be used to detect disruptions in the ER calcium store. This protocol describes the use of a Gaussia luciferase SERCaMP to examine ER calcium homeostasis in vitro and in vivo.
01:16
What is Homeostasis?
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2023
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
01:31
pH Homeostasis
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2023
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation. Respiratory Regulation of...
05:10
Imaging Calcium Dynamics in Pancreatic Cells: A Technique to Study Real-time Changes in Cytosolic Calcium Concentration in Pancreatic Islet
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2023
This video describes the technique of imaging islet cells in real-time, to study the changes in cytosolic calcium concentration in the minor subpopulations of the pancreatic islet cells. Minor cell subpopulations can be identified using functional responses to marker compounds, such as adrenaline and ghrelin, that induce changes in cytosolic calcium in a specific populations of islet cells. This can provide an insight into the cross talk between the blood glucose and the islet secretory output.
FAQs
Parathyroid hormone raises circulating calcium through three coordinated targets: bone, kidneys, and vitamin D regulation. It promotes calcium release from bone, increases renal calcium reabsorption, and activates vitamin D in the kidneys. This multi-organ response corrects calcium imbalance through complementary changes rather than relying on a single tissue or mechanism.
Calcitonin generally counteracts parathyroid hormone by limiting calcium release from bone. The two hormones therefore exert opposing influences on the movement of calcium between bone and blood. Their contrast is biologically important because calcium regulation depends on balancing signals that either increase circulating calcium or restrain its release from skeletal stores.
Vitamin D activation connects kidney function with the wider calcium-regulating system. Because parathyroid hormone promotes this activation, the kidneys participate in the hormonal response alongside their direct role in calcium reabsorption. This coordination links renal activity with intestinal and skeletal contributions, helping explain why calcium balance depends on several organs acting together.
Bones act as a regulated source of calcium rather than serving only as structural tissue. Parathyroid hormone promotes bone resorption, which releases calcium into the blood, whereas calcitonin limits calcium release from bone. Studying these opposing effects helps connect endocrine signaling with skeletal strength and with disorders involving disrupted calcium balance.
A biological analysis should consider the parathyroid glands, kidneys, intestines, bones, parathyroid hormone, and calcitonin. These components represent the major hormonal and organ-level contributors identified in calcium regulation. Examining them together is more informative than studying one tissue in isolation because their actions jointly influence blood calcium, skeletal health, and physiological function.
These disorders illustrate different consequences of disturbed calcium regulation. Calcium imbalance can impair neuromuscular function and skeletal health, while abnormal control of bone calcium release contributes to the biological context of osteoporosis and altered blood-calcium states. For this reason, calcium homeostasis provides a framework for connecting endocrine physiology with clinically important skeletal and systemic disorders.