Biology (Excretory System)
Biology Excretory - System Medical XI-XII CBSE Excretion NCERT Kidneys
Questions
What are the main excretory organs of vertebrates including mammals?
- Nephridia
- Kidneys
- Neurons
- Lungs
Which organ synthesises urea?
- Heart
- Kidney
- Liver
- Lungs
Name the excretory organs in insects.
- Malphigian tubules
- Flame cells
- Nephridia
- Green glands
Which of the following are the examples of ureotelic animals?
- Annelids
- Hydra, salamanders
- Lizards, birds
- Man, Cartilaginous fish
Out of the following, which organ is not concerned with excretion?
- Liver
- Skin
- Neuron
- Nephron
In which part of nephron is urine concentrated?
- Collecting tubule
- Proximal convoluted tubule
- Distal convoluted tubule
- Renal corpuscle
What is the medical term for kidney stones?
- Uremia
- Renal calculi
- Renal pyramid
- Ketosis
Urine is yellow in colour due to the presence of a pigment called
- haematochrome
- phytochrome
- urochrome
- lactochrome
A nephron consists of 'Glomerulus' which is a tuft of ____________ enclosed within the cup shaped Bowman's capsule.
- nerves
- capillaries
- arteries
- veins
Which is the most toxic excretory product in animals?
- Urea
- Uric acid
- Ammonia
- Carbon dioxide
The disease caused due to presence of blood in urine is called
- Nephritis
- Proteinuria
- Haematuria
- Ureteritis
Name the branch of medicine dealing with the study of function and diseases of kidney.
- Urology
- Nephrology
- Radiology
- Pathology
Name the method of removing toxic substances from the blood when the kidneys are unable to do so.
- Phenylketonuria
- Dialysis
- DLC
- Electroporation
How many litres of urine is secreted per day by a normal adult human?
- About 1-2 litres per day
- About 4 litres per day
- More than 5 litres per day
- Less than 0.5 litres per day
The involuntary passing of urine, mostly at night, commonly referred to as bedwetting is known as
- uretheritis
- enuresis
- nephritis
- uremia
In a nephron, _________________ is responsible for reabsorption and secretion.
- renal cortex
- renal pyramid
- renal pelvis
- renal tubule
Name the hormone that increases reabsorption of ions and water in the kidney.
- Thyroxin
- Calcitonin
- Aldosterone
- Adrenaline
What is the name of proteolytic enzyme secreted by the kidneys that catalyzes the formation of angiotensin and thus affects blood pressure?
- Renin
- Trypsin
- Pepsin
- Lipase
What are the animals who excrete uric acid called?
- Ammoniotelic animals
- Uricotelic animals
- Ureotelic animals
- None of the above
Older people will have ___________ Glomerular filteration rate (GFR) levels. The GFR test measures how well your kidneys are filtering a waste called 'creatinine'.
- higher
- lower
- abnormal
- very high
Which one of the following is not the accessory excretory organ in vertebrates?
- Skin
- Liver
- Lungs
- Heart
'Diuretics' are the substances which cause
- decreased formation of urine
- dehydration
- increased formation of urine
- diarrhoea
What is the name of blood vessel that supplies blood to the kidneys?
- Renal artery
- Renal vein
- Aorta
- Inferior vena cava
A depression or pit where structures such as blood vessels and nerves enter the kidney is known as
- renal pyramid
- renal calyx
- renal pelvis
- renal hilum
Which limb of Henle's loop is least permeable to water?
- Ascending limb
- Descending limb
- Both the limbs are equally permeable
- None of the two limbs