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Which of the following kidney processes is always active and always requires energy to occur quizlet?
Which of the following kidney processes is always active and always requires energy to occur? proximal tubule.
What is the primary function of the proximal tubule?
The primary function of the proximal tubule is the reabsorption of glucose, amino acids, phosphate and citrate.
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What is the primary force that causes glomerular filtration?
hydrostatic pressure: The pushing force exerted by the pressure in a blood vessel. It is the primary force that drives glomerular filtration.
What process involves the active transport of contents in the peritubular capillaries into the proximal and distal tubules of a nephron?
Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen; it is the opposite process of reabsorption. This secretion is caused mainly by active transport and passive diffusion.
Which of these occurs first in homeostasis?
During hemostasis three steps occur in a rapid sequence. Vascular spasm is the first response as the blood vessels constrict to allow less blood to be lost. In the second step, platelet plug formation, platelets stick together to form a temporary seal to cover the break in the vessel wall.
Where does all filtration take place in the kidneys?
Each of your kidneys is made up of about a million filtering units called nephrons. Each nephron includes a filter, called the glomerulus, and a tubule. The nephrons work through a two-step process: the glomerulus filters your blood, and the tubule returns needed substances to your blood and removes wastes.
What is tubular function?
The function of the proximal tubule is essentially reabsorption of filtrate in accordance with the needs of homeostasis (equilibrium), whereas the distal part of the nephron and collecting duct are mainly concerned with the detailed regulation of water, electrolyte, and hydrogen-ion balance.
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Chapter 19 pt. 1 Flashcards | Chegg.com
Which of the following kidney processes is always active and always requires energy to occur? A) filtration. B) reabsorption. C) secretion. D) excretion.
chapter 19 Flashcards by Jackee Bloodsworth | Brainscape
Which of the following kidney processes is always active and always requires energy to occur? A) reabsorption. B) filtration. C) excretion. D) secretion …
Tubular reabsorption article – Khan Academy
Tubular reabsorption is the process that moves solutes and water out of the filtrate and back into your bloodstream. This process is known as reabsorption, …
Active and Passive Transport – Mammalian Kidneys
Passive transport occurs in the kidney as the small blood capillaries called glomerulus have their waste products removed from the blood. The concentration of …
What is the main function of the loop of Henle?
The principal function of the loop of Henle is in the recovery of water and sodium chloride from urine. This function allows production of urine that is far more concentrated than blood, limiting the amount of water needed as intake for survival.
What is the function of distal tubule?
Abstract. The distal convoluted tubule (DCT) is a short nephron segment, interposed between the macula densa and collecting duct. Even though it is short, it plays a key role in regulating extracellular fluid volume and electrolyte homeostasis.
What is the process of glomerular filtration?
Glomerular filtration is the first step in making urine. It is the process that your kidneys use to filter excess fluid and waste products out of the blood into the urine collecting tubules of the kidney, so they may be eliminated from your body.
What is the process of tubular reabsorption?
Tubular reabsorption is the process that moves solutes and water out of the filtrate and back into your bloodstream. This process is known as reabsorption, because this is the second time they have been absorbed; the first time being when they were absorbed into the bloodstream from the digestive tract after a meal.
What is urine formation process?
Urine is formed in three main steps- glomerular filtration, reabsorption and secretion. It comprises 95 % water and 5% wastes such as ions of sodium, potassium and calcium, and nitrogenous wastes such as creatinine, urea and ammonia. Osmoregulation is the process of maintaining homeostasis of the body.
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What is active tubular secretion?
Active tubular secretion is a carrier-mediated transport system, located in the proximal renal tubule. It requires energy input because the drug is moved against a concentration gradient. Two active tubular secretion systems have been identified: anion secretion for acids and cation secretion for bases.
What is the difference between tubular reabsorption and tubular secretion?
The key difference between tubular reabsorption and tubular secretion is that tubular reabsorption involves the removal of some solutes and water from the tubular fluid and their return to the blood, while tubular secretion involves the removal of hydrogen, creatinine, and drugs from the blood and return to the …
Which of the following regions of the nephron is water actively transported?
In which of the following regions of the nephron is water actively transported? D. Peritubular capillaries.
Which step in hemostasis involves activation?
The mechanism of hemostasis can divide into four stages. 1) Constriction of the blood vessel. 2) Formation of a temporary “platelet plug.” 3) Activation of the coagulation cascade. 4) Formation of “fibrin plug” or the final clot.
What are the stages of homeostasis?
There are three stages of homeostasis. They are sensing, processing and responding. These stages are managed by the receptor, control center and effector respectively. These stages work in a continuous manner for the maintenance of homeostasis.
What are the three stages of hemostasis?
Haemostasis involves three basic steps: vascular spasm, the formation of a platelet plug, and coagulation, by which clotting factors promote the formation of a fibrin clot.
What is filtering filtration?
Filtration is the process of separating suspended solid matter from a liquid, by causing the latter to pass through the pores of some substance, called a filter. The liquid which has passed through the filter is called the filtrate.
How reabsorption is a selective process?
Selective reabsorption is the process whereby certain molecules (e.g. ions, glucose and amino acids), after being filtered out of the capillaries along with nitrogenous waste products (i.e. urea) and water in the glomerulus, are reabsorbed from the filtrate as they pass through the nephron.
Where does filtration reabsorption and secretion occur?
The nephrons of the kidneys process blood and create urine through a process of filtration, reabsorption, and secretion. Urine is about 95% water and 5% waste products. Nitrogenous wastes excreted in urine include urea, creatinine, ammonia, and uric acid.
What is the function of Bowman’s capsule?
Bowman’s capsule surrounds the glomerular capillary loops and participates in the filtration of blood from the glomerular capillaries. Bowman’s capsule also has a structural function and creates a urinary space through which filtrate can enter the nephron and pass to the proximal convoluted tubule.
Notes for IB Biology Chapter 1.4
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What process occurs along the proximal tubules of a nephron?
Proximal tubules are responsible for reabsorbing approximately 65% of filtered load and most, if not all, of filtered amino acids, glucose, solutes, and low molecular weight proteins. Proximal tubules also play a key role in regulating acid-base balance by reabsorbing approximately 80% of filtered bicarbonate.
Where does tubular reabsorption occur?
Tubular reabsorption is the second major step in urine formation. Most of the reabsorption of solutes necessary for normal body function, such as amino acids, glucose, and salts, takes place in the proximal part of the tubule.
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