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What is the juxtaglomerular apparatus in the body?
The juxtaglomerular apparatus is a specialized structure found in the kidney that regulates blood pressure and kidney function. It consists of the macula densa, juxtaglomerular cells, and extraglomerular mesangial cells, which work together to control the release of renin and the constriction of blood vessels.
What is the juxtaglomerular apparatus responsible for?
The juxtaglomerular apparatus is responsible for regulating blood pressure and kidney function. It consists of specialized cells in the afferent arteriole and the distal convoluted tubule that sense changes in blood pressure and help regulate the secretion of renin, which plays a key role in the renin-angiotensin-aldosterone system.
What structures secretes renin when blood pressure in the afferent arteriole drops?
The juxtaglomerular cells located in the walls of the afferent arteriole secrete renin when they sense a drop in blood pressure. Renin is released into the bloodstream in response to decreased blood flow to the kidneys, ultimately leading to the activation of the renin-angiotensin-aldosterone system to help regulate blood pressure and fluid balance.
What enzyme is released by the juxtaglomerular cells?
Renin is the enzyme released by juxtaglomerular cells. It plays a key role in the renin-angiotensin-aldosterone system, which helps regulate blood pressure and fluid balance in the body.
Which cells of the kidney are chemoreceptors that respond to changes in solute content of the filtrate?
The macula densa cells located in the distal convoluted tubule of the kidney are chemoreceptors that respond to changes in solute content of the filtrate. These cells are sensitive to the concentration of sodium and chloride ions in the filtrate, signaling the juxtaglomerular cells to regulate blood pressure and filtration rate accordingly.
What is the filtration rate controlled by?
The filtration rate in the kidneys is primarily controlled by blood pressure and the action of hormones such as aldosterone and antidiuretic hormone. These factors regulate the amount of blood flow through the glomerulus and the permeability of the filtration membrane.
How does renin-angiotensin negative feedback loop helps regulate blood pressure and glomerular filtration rate in response to dehydration?
Dehydration causes a decrease in blood volume and pressure, which decreases GFR. The JG cells of the juxtaglomerular apparatus sense decreased stretch and macula densa cells sense decreased water. The JG cells secrete renin which converts angiotensinogen in blood to angiotensin I. The latter is converted to angiotensin II by ACE in the lungs. Angiotensin II causes constriction of efferent arterioles, increased thirst, greater ADH secretion from the posterior pituitary and increased secretion of aldosterone from the adrenal corted. Blood volume is increased, which increases venous return, stroke volume, cardiac output, and BP
How does kidney help regulate blood pressure?
The kidneys help regulate blood pressure by controlling the amount of fluid in the body through filtration of blood and secretion of hormones like renin. Renin helps to regulate blood volume and blood pressure by activating the renin-angiotensin-aldosterone system, which constricts blood vessels and increases blood pressure. Additionally, the kidneys play a role in managing electrolyte levels, which can impact blood pressure regulation.
What is the microscopic chemical filtration factory?
The microscopic chemical filtration factory is the cell. Inside the cell, various organelles such as the endoplasmic reticulum, Golgi apparatus, and lysosomes work together to process and detoxify chemicals, filter waste, and regulate the cell's internal environment. This intricate system allows the cell to maintain homeostasis and carry out essential functions.
What do the baroreceptors regulate?
They regulate blood pressure.
What do kidney regulate in the blood?
They help regulate blood pressure (I think)
What is the purpose of sending blood to kidney for filtration?
Hemodialaysis
