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The hormone ADH functions to promote water re-abdsorption through the wall of what in the kidney?
ADH promotes water reabsorption through the wall of the collecting duct in the kidney by increasing the permeability of the duct to water. This helps regulate water balance in the body by allowing the reabsorption of water into the bloodstream.
Is it possible for the kidney to increase water reabsorption without increasing salt absorption Explain?
Yes, it is possible for the kidney to increase water reabsorption without increasing salt absorption. This can occur through the action of antidiuretic hormone (ADH), which promotes the reabsorption of water in the collecting ducts without directly affecting sodium reabsorption. In conditions such as hyperosmolarity, the kidneys can concentrate urine by reabsorbing more water, while sodium levels in the body remain stable. Thus, water reabsorption can be enhanced independently of sodium absorption.
What are the two reabsorption pathways through the tubular cell barrier?
The two reabsorption pathways through the tubular cell barrier are transcellular and paracellular. In transcellular reabsorption, substances pass through the tubular cells from the lumen to the bloodstream. In paracellular reabsorption, substances pass between cells through tight junctions.
Two main functions of the testes?
production of male hormone testosterone; and production of sperm
Does direct neural stimulation through the sympathetic division promote many metabolic effects via hormone release?
True
What are the two principal functions of the testis?
The two principal functions of the testis are sperm production through spermatogenesis and hormone production, mainly testosterone, which is responsible for male sexual characteristics and reproductive functions.
What is the process resulting in the reabsorption of water?
In the kidneys, water reabsorption occurs through osmosis during the process of urine formation. It is regulated by hormones such as antidiuretic hormone (ADH), which increases the permeability of the collecting ducts to water, allowing more water to be reabsorbed back into the bloodstream. This helps to maintain the body's water balance and prevent dehydration.
How do kidneys conserve water?
Kidneys conserve water primarily through the process of concentrating urine. This is achieved in the nephron, particularly in the loop of Henle and the collecting duct, where water is reabsorbed back into the bloodstream in response to the hormone vasopressin (also known as antidiuretic hormone, ADH). When the body is dehydrated, higher levels of ADH are released, promoting greater water reabsorption and producing more concentrated urine. Additionally, the kidneys adjust the reabsorption of sodium, which also influences water retention.
What function control the concentration of water in the blood?
The concentration of water in the blood is primarily controlled by the hormone vasopressin, also known as antidiuretic hormone (ADH). Produced by the hypothalamus and released by the posterior pituitary gland, ADH regulates water reabsorption in the kidneys, allowing the body to retain or excrete water as needed. Additionally, the kidneys play a crucial role in maintaining water balance through filtration and reabsorption processes. Together, these mechanisms help ensure proper hydration and osmotic balance in the bloodstream.
How does water reabsorption in kidneys occur?
by osmosis through tubular aquaporins
Which one of the following statements is TRUE regarding parathyroid hormone (PTH)?
Parathyroid hormone (PTH) is primarily responsible for regulating calcium levels in the blood. It increases blood calcium levels by stimulating osteoclast activity in bones, promoting renal reabsorption of calcium, and enhancing intestinal calcium absorption through its effect on vitamin D metabolism. Additionally, PTH decreases phosphate reabsorption in the kidneys, leading to increased phosphate excretion. Overall, PTH plays a critical role in maintaining calcium homeostasis in the body.
What is passive reabsorption?
Passive reabsorption is a product of osmosis. Some parts of the renal to our very permeable to water and ions, and occurs through the junctions between cells.
