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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.
Function of Seminiferous tubules?
The main function of the seminiferous tubules are to produce sperm.
Where do you find simple cuboidal tissue?
Description; single later of cube-like cells with large, spherical central nuclei.Function; secretion and absorption.Location; kidney tubules; ducts and secretory portions of small glands; ovary surface.
What connects the sarcolemma and the sarcoplasmic reticulum?
They connect to the transverse tubules of the the sarcolemma at triad junctions.
Is Testicular cancer found in the connective tissue cells or the epithelial cells of the semiferous tubules?
epithelial cells of the semiinferous tubules.
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.
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.
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 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
Which hormones is most likely to cause production of a concentrated urine?
Antidiuretic hormone(ADH) reabsorbs water from the collecting tubules of the kidney causing urine to become concentrated.
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 are the tunnel-like extensions of the sarcolemma into the muscle fiber?
transverse tubules transverse tubules
