NEW
Font size
WorksheetsExcretion
Total questions: 50
Worksheet time: 25mins
The basic functional unit of human kidney is
Henlé's loop
Nephron
Nephridia
Pyramid
The Bowman’s capsules are found in
Cortex
Medulla
Convoluted tubule
Loop of Henlé
The hollow space at the centre of kidney where urine is collected after its formation is called
Urethra
Distal convoluted tubule
Glomerulus
Renal pelvis
The lungs are important organs for excretion of
Ammonia
Water
Carbon dioxide
Urea
The main nitrogen-containing waste excreted in urine is
Nucleotides
Creatine phosphate
Ammonia
Urea
The muscular tubes which take the urine from the kidneys to the bladder are
Urethras
Urinary bladders
Nephrons
Ureters
The principal nitrogenous excretory compound in humans is synthesised
In kidneys but eliminated mostly through liver
In liver and also eliminated by the same through bile
In kidneys as well as eliminated by kidneys
In the liver but eliminated mostly through kidneys
The number of uriniferous tubules in each kidney of man is
About 10,000
Numerous
About 5,000
About 1.0*106
The waste matters (urea) are transported by
RBC
Blood
Lymph
None of the above
Conversion of excess of amino acids into urea is done in
Lungs
Large intestine
Cloaca
Liver
Excretion is a continuous process but urine is not passed out continuously because of
Ureter
Rectum
Cloaca
Urinary bladder
The main excretory organs in man are
Kidneys
Nephridia
Trachea
Lungs
The smallest functional unit of kidney is
Collecting tube
Glomerulus
Bowman’s capsule
Nephron
The ureter carries urine from
kidney to the bladder
collecting tubule to the pelvis
nephron to the collecting tubule
bladder out of the body
When the filtrate passes through the kidney tubule, most of the water moves back into the blood stream. This makes the filtrate
more dilute
darker
more concentrated
paler in colour
Excretion is important in living organisms because metabolic waste products
cannot be stored
decay very readily
are very soluble substances
can poison living organism
Which of the following is NOT an excretory product in humans
Urea
Water
Undigested food
Sodium chloride
Although glucose is found in the blood plasma, it does not appear in the urine because of
osmosis
ultrafiltration
secretion
selective reabsorption
Which of the following organs is MOST directly affected when the pituitary gland is mafunctioning
Kidney
Lung
Skin
Colon
Kidneys are not the only organs of excretion, their work is supplemented by
Large intestine
Heart
Liver
Skin
Diameter of the renal afferent vessel is
Same as that of efferent
There is no efferent vessel
Larger than that of efferent
Smaller than that of efferent
The afferent and efferent vessels are
Arterial in nature
Venous in nature
One is arterial and the other is venous
None of the above
Deamination is the first step in urea formation. It means the
Reduction of ammonia
Oxidation of ammonia
Addition of amino group to a non-amino organic molecule
Removal of amino group from an amino acid
The reabsorption of glucose from the glomerular filtrate is due to
Passive diffusion
Filtration pressure exerted on the fluids in the loop of Henle
Active transport across the walls of proximal convoluted part
High osmotic pressure of filtrate
The process that pushes out water and other dissolved materials from blood in the glomerulus is
Dialysis
Secretion
Filtration
Ultrafiltration
The material passes into Bowman's capsule is called
tubular secretion
selective reabsorption
pressure filtration
glomerular filtrate
The ascending limb of the loop of Henle allows the reabsorption of
urea
minerals
uric acid
salts
_______ facilitates reabsorption of water by the nephron.
Loop of the Henle
Medulla
Cortexs
Pelvis
Bile manufactured by liver is stored within the ________.
Gall bladder
Urinary bladder
Liver
Lungs
Glomerular capsule and Convoluted tubules always lie within the _______.
Renal pelvis
Renal medulla
Renal cortex
None of these
Glomerular filtrate passes from glomerular capsule into the ______
Loop of the nephron
Proximal convoluted tubule
Glomerular capsule
Convoluted tubule
If a man takes large amount of protein, he is likely to excrete more amount of
Glucose
Urea and uric acid
Water
Salts
In the kidneys, osmotic pressure controls ______.
Glucose absorption
Sodium absorption
Water absorption
none of these
Which vessel carries blood to the kidneys?
Renal Arteries
Renal Vein
Both renal artery and renal vein
Hepatic portal vein
Most of the reabsorption of salts and water occurs in the ______.
Collecting tubule
Proximal convoluted tubule
Loops of Henle
Distal convoluted tubule
Which of the following anatomical portion of a nephron connects the Bowman’s capsule to the loop of Henle?
Distal convoluted tubule
Connecting tubule
Proximal convoluted tubule
Collecting duct
Urine is formed in a three-step process: which of the following gives the correct order in which these steps take place in the nephron?
Tubular secretion, tubular reabsorption, glomerular filtration
Tubular reabsorption, tubular secretion, glomerular filtration
Glomerular filtration, tubular reabsorption, tubular secretion
Glomerular filtration, tubular secretion, tubular reabsorption
Which of the following is least likely to be present in the glomerular filtrate (the filtrate produced by the nephron before it enters the loop of Henle) of a healthy adult nephron?
Amino acids
Glucose
Electrolytes
Large molecular weight protein
Presence of which of the following in the urine, even in small amounts, is indicative of a possible problem in the renal system of a patient?
Glucose
Creatinine
Urea
Sodium
As glomerular filtrate moves through the ascending loop of Henle, the filtrate becomes more dilute: why?
The ascending loop of Henle is permeable to water and ions
The ascending loop of Henle is permeable to ions but impermeable to water
The ascending loop of Henle is impermeable to water and ions
The ascending loop of Henle is permeable to water but not to ions
Which of the following choices correctly traces the route of glomerular filtrate on its path to the collecting duct of a nephron?
proximal tubule, Bowman’s capsule, descending loop of Henle, ascending loop of Henle, distal tubule
Bowman’s capsule, proximal tubule, descending loop of Henle, ascending loop of Henle, distal tubule
Bowman’s capsule, distal tubule, descending loop of Henle, ascending loop of Henle, proximal tubule
Bowman’s capsule, proximal tubule, ascending loop of Henle, descending loop of Henle, distal tubule
Which of these has the highest concentration in the urine?
glucose
sodium
uric acid
phosphate
All the following are function of the kidney except:
regulating the volume of blood plasma
regulating the concentration of waste products in the blood
regulating the digestion of carbohydrates and proteins
regulating the concentration of ions in the plasma
The fluid that enters the glomerulus is:
serum
blood
sea water
fresh water
The pigments that give urine its yellow or amber color are derived from
nerve cells
plant cells
bile and hemoglobin molecules
ketone bodies
The process which occurs in Q is?
secretion
reabsorption
osmosis
filtration
One component present in the fluid in P but NOT in the fluid in Q is
urea
blood plasma
glucose
blood proteins
The concentration of urea at S is about 60 times its concentration at R because
large quantities of urea are excreted from the body
urea passes into the tubule at various points along its length
most of the fluid in the tubule is reabsorbed before reaching S
at S, urine collects from several smaller collecting ducts
In which part of the kidney is the loop of Henlé located?
I
II
III
IV
Into which structure is urine emptied
I
II
III
IV
