Life Processes Test

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Life Processes Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is not a part of the human excretory system?

A
Kidneys

B
Ureter

C
Rete testis

D
Urinary bladder

Solution

Rete testis is not a part of the human excretory system. The excretory system of human beings includes a pair of kidneys, a pair of ureters, a urinary bladder and a urethra.
Question 2
1 / -0

What is the purpose of making urine?

A
To get rid of all the water in the body

B
Filter out waste products from the blood

C
To remove excess fat from the body

D
To get rid of the yellow pigments of the body

Solution

The purpose of making urine is to filter out waste products from the blood. Just as CO2 is removed from the blood in the lungs, nitrogenous waste such as urea or uric acid are removed from blood in the kidneys.
Question 3
1 / -0

The filtration unit of kidneys is known as:

A
Nephron

B
Neuron

C
Nodules

D
Nodes

Solution

The basic filtration unit of kidney is the nephron. A single nephron is made up of renal corpuscle and a renal tubule. In turn renal corpuscle is made up of glomerulus and Bowman's capsule.
Question 4
1 / -0

Normally, in a healthy adult, the initial filtrate in the kidneys is about _________ daily.

A
180 L

B
1 L

C
2 L

D
120 L

Solution

Normally, in a healthy adult, the initial filtrate in the kidneys is about 180 L daily.

However, the volume actually excreted is only a litre or two a day, because the remaining filtrate is re- absorbed in the kidney tubules.
Question 5
1 / -0

Which of the following substance will not be reabsorbed in the initial filtration?

A
Water

B
Urea

C
Glucose

D
Salts

Solution

Urea is a nitrogenous waste produced by the body which needs to be removed therefore it will not be reabsorbed by the body at all.

However substances such as, such as glucose, amino acids, salts and a major amount of water, are selectively re-absorbed as the urine flows along the tube.