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How is urea reabsorbed?
40-50 % of filtered urea is reabsorbed through passive diffusion in the Proximal Convoluted Tubules. Loop of Henle, Distal Convoluted Tubules and Cortical Collecting Ducts are impermeable to urea. But secretion of urea happens in descending Loop of Henle (This helps to maintain the osmotic gradient in the medulla of the Kidney). There is also re-absorption of urea in the medullary collecting ducts.
What is the rete testis?
Found in the testis (of the male reproductive system), it is the network of canals at the termination of the straight tubules in the mediastinum testis. Synonymous to Haller rete, rete halleri. -monchet [^^,]
Where is the primary site at which tubular secretion occur?
Tubular secretion is a part of urine formation occurring within the nephrons of the kidneys. After glomerular filtration, in which fluids from the blood pass into the glomerular capsule of the renal tubule, the filtrate is subject to tubular reabsorption and tubular secretion within the convoluted tubules and collecting ducts of the nephrons.
Function of Seminiferous tubules?
Seminiferous tubules are responsible for producing and transporting sperm cells through the process of spermatogenesis. They provide the structural environment where sperm maturation and differentiation take place within the testes. These tubules are also involved in the secretion of hormones necessary for the development of male reproductive organs and secondary sexual characteristics.
Do cardiac muscles have T tubules?
Yes, cardiac muscles do have T tubules. T tubules are invaginations of the cell membrane that help transmit electrical signals throughout the muscle cell, allowing for coordinated contraction.
Renal pyramids are?
collecting ducts and uriniferous tubules
What structure of kidney contains the collecting tubules?
medulla
The movement of substances from the blood into the renal tubules is called?
SecretionSecretion is the process by which substances move into the distal and collecting tubules from blood in the capillaries around these tubules.
Do casts come from the tubules the calyces or the ureters?
Casts are formed in the distal convoluted tubules and collecting ducts of the nephron in the kidney. They are made up of protein or cellular material that becomes trapped in the renal tubules and is then washed out into the urine, where they can be detected.
Distal convoluted tubules flow directly into what structures?
The structures that distal tubes flow into are the collecting ducts of the kidneys. The collecting ducts are small tubes through which urine flows into the renal pelvis.
What is renal papilla?
The renal papilla is located in the kidneys. The function of the renal papilla is to store urine before it is excreted from the bladder. It contains part of the secreting tubules and the collecting tubules.
What is the medical term meaning portion of a nephron that is active in filtering urine?
The Proximal convoluted tubules, descending loop , ascending loop of henle and the distal convoluted tubules. Though the collecting ducts determine the final concentration of urine, an author states that it's not a part of the nephron.
What isa the function renal pelvis in excretory system?
The renal pelvis collects urine filtrate from the collecting tubules.
Does diuretics work on the collecting ducts?
Diuretics work in the region of the collecting ducts, but on the ducts themselves. They inhibit ADH from causing water to be reabsorbed in the distal tubules and that produces more urine output.
The filtrate within the nephron becomes urine only when it passes through the distal convoluted tubules and enters the collecting ducts?
False
What acts on the distal convoluted tubules and collecting ducts?
The distal convoluted tubules and collecting ducts are primarily influenced by hormones such as aldosterone and antidiuretic hormone (ADH). Aldosterone promotes sodium reabsorption and potassium excretion, while ADH increases water reabsorption by making the collecting ducts more permeable to water. Together, these hormones play crucial roles in regulating electrolyte balance and fluid homeostasis in the body.
How is urea reabsorbed?
40-50 % of filtered urea is reabsorbed through passive diffusion in the Proximal Convoluted Tubules. Loop of Henle, Distal Convoluted Tubules and Cortical Collecting Ducts are impermeable to urea. But secretion of urea happens in descending Loop of Henle (This helps to maintain the osmotic gradient in the medulla of the Kidney). There is also re-absorption of urea in the medullary collecting ducts.
