Biology

Human Excretion and Kidney Physiology

1,152 Questions

Human excretion and kidney physiology questions test your understanding of the excretory system, including the role of renal tubules and glomerular filtration. You will also find topics on urine formation, body water absorption, and excretory products. This section is vital for medical and general science exam preparation.

Glomerular filtrationRenal tubule absorptionExcretory productsRole of sodium ionsHuman excretory system

Human Excretion and Kidney Physiology Questions

Multiple choice

The collecting duct in human kidney is also called :

  1. Duct of Bellini

  2. Malpighian tubule

  3. Henle's loop

  4. Bertin column
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Collecting duct is the central tube to which all renal tubes empty their contents into and is also called Duct of Bellini after the scientist who discovered it

Multiple choice

Which of the following statements is/are false?

a. Human kidney consists of a large number of coiled tubes called ureter. b. Acting as filters, nephrons filter the waste products from the blood. c. Urethra works as the outlet passage for urine.

  1. Only b

  2. Only a

  3. Only a and b

  4. Only c

  5. Only b and c
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 This is the correct option. Human kidney consists of a large number of coiled tubes called ureter, is a false statement. Human kidney consists of a large number of coiled tubes called nephrons.

Multiple choice

Why is ammonotelism mostly found in aquatic animals?

  1. Because they have liver to detoxify ammonia

  2. Because ammonia is highly soluble in water and a large volume of water is needed to dissolve ammonia

  3. Because ammonia is non-toxic to aquatic animals

  4. Because they are the only producer of ammonia as a result of catabolism of proteins

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ammonia is highly soluble in water and a very large volume of water is needed by the animal to dissolve ammonia. 1 gm of ammonia needs about 300 - 500 ml of water. But this is not a problem for animals living in an aqueous habitat which are generally found to be ammonotelic.

Multiple choice

What are uricotelic animals?

  1. Animals that excrete urea as nitrogenous waste

  2. Animals that excrete uric acid as nitrogenous waste

  3. Animals that excrete ammonia as nitrogenous waste

  4. Animals that excrete guanine as nitrogenous waste

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Animals which excrete uric acid as nitrogenous waste are called uricotelic animals.

Multiple choice

Amoeba performs excretion through

  1. skin

  2. contractile vacuole and diffusion

  3. special organs

  4. pinocytosis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Amoeba possesses a contractile vacuole for excretion and osmoregulation. Undigested food is excreted by exocytosis. Some wastes and CO2 are excreted through the plasma membrane by diffusion.

Multiple choice

Taurine is

  1. an amino acid found in muscles and brain

  2. an amino acid found in urine and kidney

  3. a neurotransmitter in brain

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

amino acid found in muscle and brain