Advertisements
Advertisements
Question
Which segment is the site of secretion and regulated reabsorption of ions and pH homeostasis?
Advertisements
Solution
- Distal tubule
- Collecting duct
- In the renal tubules H+ and NH4 are secreted and liberated into the tubules and excreted through
urine thus maintaining acid-base balance. - For each H+ ions from the liberated filtrate one Na+ is reabsorbed in the tubules.
- The secreted HCO3, PO3 and NH3 combines to form carbonic acid and phosphoric acids.
- Thus the H+ are maintained and their reabsorption is prevented.
RELATED QUESTIONS
What is meant by the term osmoregulation?
Put a tick mark (✓) against the most appropriate alternative in the following statement :
Besides water, the urine mainly contains :
Define the following:
Nephron
Fill in the blank.
........................ is found in the seeds of poppy plants.
Define the following term:
Ultrafiltration
Write the functional activity of the following structure: Bowman’s capsule
In which segment of the nephron most of the re-absorption of substances takes place?
Concentration of urine depends upon which part of the nephron
Identify the biological term
A liquid which gathers in the bladder.
Identfiy the biological term
Temporary storage of urine.
What is the nitrogenous waste produced by amphibian larvae and by the adult animal?
How is urea formed in the human body?
Proximal convoluted tubule differs from distal convoluted tubule being lined by ______
The osmotic pressure of blood that opposes ultrafiltration is about ______ mm Hg.
Which part of the nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?
Filtration of the blood takes place at ______.
Sort the following into actively or passively transported substances during reabsorption of GFR.
glucose, amino acids, nitrogenous wastes, Na+, water
Complete the following:
Urinary excretion = Tubular reabsorption + Tubular secretion –
