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level: osmoregulation

Questions and Answers List

level questions: osmoregulation

Question	Answer
What metabolic waste is not removed during excretion?	blood
This is the organ involved in the excretion of nitrogenous waste and excess water.	kidney
What is a function of transport epithelia?	In osmoregulation, it is the cause of the movement of solutes
What is the four steps that a nephron uses to carry out its function?	Filtration, Reabsorption, Secretion, Excretion
Molecules included in filtration:	Glucose, Amino acids, Salts, vitamins,
Filtration occurs by:	passive transport
What is the function of secretion?	To actively transport materials from the blood to the kidneys
True or false: Reabsorption occurs by both active and passive transport.	True
The cup-shaped swelling that is formed by the blind end of the glomerulus tubule is called:	Bowman's Capsule
examples of waste product of organisms are?	ammonia, urea, uric acid nitrogenous waste
What directly regulates kidney function?	hormones
Which process in the nephron is least selective?	filtration
Which factor does not adjust both the volume and concentration of urine in the kidneys?	production of ATP
maintenance of constant osmotic conditions in the body	osmoregulation
Explain how and why large amounts of dilute urine is produced	1. hypothalamus detects solute concentration in blood 2. If too low, sends a message to the pituitary glans to secrete less ADH 3. ADH travels in blood to kidneys 4. Less ADH makes distal convoluted tubules and collecting ducts less permeable to water (less water reabsorbed from filtrate) 5. Large amounts of dilute urine produced
1. Hypothalamus detects solute concentration in blood 2. If too high, sends message to the pituitary gland to secrete more ADH 3. ADH travels to the kidneys 4. More ADH makes distal convoluted tubules and collecting ducts more permeable to water (more water reabsorbed from filtrate What is the result?	Small amounts of concentrated urine produced