Biology

Human Excretion and Kidney Physiology

1,215 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

Ornithine cycle is known as

  1. urea cycle

  2. urine cycle

  3. blood circulation

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

The Ornithine cycle, also known as the urea cycle, is a series of biochemical reactions in the liver that produce urea from ammonia.

Multiple choice

DCT refers to

  1. direct convoluted tube

  2. distal convoluted tubule

  3. distance convolution tube

  4. distal convoluted tube
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DCT stands for Distal Convoluted Tubule, a portion of the nephron between the loop of Henle and the collecting duct.

Multiple choice

________ protect(s) the kidneys.

  1. Upper ribs

  2. Lower two pairs of ribs

  3. Both 1 and 2

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The kidneys are located in the abdominal cavity and are partially protected by the lower two pairs of ribs (the floating ribs).

Multiple choice

Micturition is passing out _______ from _______.

  1. blood, capillaries

  2. urine, urinary bladder

  3. Both 1 and 2

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micturition is the medical term for the act of emptying the urinary bladder, which involves the passage of urine through the urethra.

Multiple choice

Waste matter discharged from human body

  1. Fat

  2. Protein

  3. Excreta

  4. Mineral
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

waste matter discharged from the body, especially in the form of faeces and urine is known as the excreta.

Multiple choice

Excretion is mainly responsible for the removal of

  1. excess of water

  2. carbon dioxide

  3. unnecessary and harmful products

  4. waste products of the animal’s own metabolism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Excretion is mainly responsible for the removal of waste products of the animal’s own metabolism. In vertebrates this is primarily carried out by the lungs, kidneys and skin.

Multiple choice

Filtration of wastes from the blood in human body is carried out by

  1. liver

  2. lungs

  3. kidney

  4. heart
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Filtration of wastes from the blood in human body is carried out by kidney. Kidneys are essential to the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid–base balance, and regulation of blood pressure (via maintaining the salt and water balance).

Multiple choice

In kidney, glomerulus is involved in

  1. reabsorption of salts

  2. urine collection

  3. urine formation by blood filtration

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 In kidney, glomerulus is involved in urine formation by blood filtration..Glomerulus serves as the first stage in the filtering process of the blood carried out by the nephron in its formation of urine.

Multiple choice

Maximum absorption of water in mammals is in

  1. lungs

  2. skin

  3. kidney

  4. small intestine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Maximum absorption of water in mammals is in kidney. Most of the water in the filtrate is reabsorbed because of renal processes which are independent of ADH action.