Excretion

Q.

Define Excretion.

Q. is the process of removal of undigested food from the body.

1. Urination
2. Ingestion
3. Egestion
4. Digestion

Q.

The accessory excretory human organs are:

1. Skin and heart

2. Skin and liver

3. Skin, lungs and heart

4. Skin, lungs and liver

Q.

What are the metabolic wastes produce in the body of human beings?

Q.

What are nitrogenous waste? How are they excreted?

Q.

imagine what happens if waste materials are not sent out of the body from time to time

Q. Blood in renal vein has more concentration of nitrogenous waste than the blood in renal artery.

1. True
2. False

Q.

Name the two waste products of the human body which are produced in the body cells.

Q. Malpighian corpuscle comprises of

1. PCT and DCT
2. PCT, DCT and Henle’s loop
3. Glomerulus and Bowman’s capsule
4. Henle’s loop and Bowman’s capsule

Q.

What is the main nitrogenous waste in human beings?

Q.

Define excretion. Name the excretory unit of a kidney.

Q.

In Hydra and Amoeba, ammonia is the main nitrogenous waste. Lizards, snakes, birds and insects excrete mostly uric acid but crocodiles and alligators excrete mainly ammonia though they are reptiles.
On the basis of this can we generalise that :-

1. There is no uniform pattern of removal of nitrogen wastes.

2. Nitrogen waste excretion is closely related to the availability of water in the environment.

3. Aquatic and land animals excrete urea.

4. Animals that fly excrete uric acid.

Q. Assertion (A): Excretion is an active process.
Reason (R): Excretion is the process of movement of waste materials out of the body.

1. Both A and R are true but R is not the correct explanation of A.
2. Both A and R are true and R is the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Q.

Name the process by which amoeba performs excretion.

Q. Waste products are stored in all of the following parts of plants, except

1. Vacuoles
2. Flowers
3. Old xylem
4. Leaves

Q. Amongst given parts of human excretory system how many occur(s) in pairs?
Urethra, Kidney, Urinary bladder, Ureter

1. Four
2. Three
3. Two
4. One

Q.

________ are the main excretory organs in the body.

Q.

Skin helps in excretion of water and ______.

Q.

Label the following diagram.

1. 1-Kidney, 2-Urethra, 3-Urinary Bladder, 4-Ureter

2. 1-Kidney, 2-Ureter, 3-Urethra, 4-Urinary bladder

3. 1-Kidney, 2-Ureter, 3-Urinary bladder, 4-Urethra

4. 1-Kidney, 2-Urinary bladder, 3-Ureter, 4-Urethra

Q.

Why is excretion necessary? Name the common excretory substances in our body.

Q.

Write any one function of urinary bladder.

Q.

A mammal excretes nitrogen in the form of-

1. Ammonium ion

2. Amino acid

3. Urea

4. Uric acid

Q.

Which one of the following in real sense is not an excretory activity?

(a) Giving out carbon dioxide

(b) Passing out faecal matter

(c) Sweating

(d) Removal of urea.

Q.

Question 3
How is the amount of urine produced regulated?

Q. Why is pepsin secreted in inactive form by the ​gastric glands?​

1. To control the secretion of HCl​
2. To protect the stomach cells protein from getting digested​
3. To decrease the impact of acidity​
4. To protect the walls of stomach along with the mucus​

Q.

Structure that carries urine out of the kidneys is ____________.

1. Urethra

2. Ureter

3. Urinary bladder

4. Sphincter

Q.

What is the difference between metabolic waste and digestive waste ?

Q. 16.List four strategies used by plants for excretion. (2)

Q.

All mammals excrete nitrogen in the form of uric acid.

1. True
2. False

Q.

A detoxifying gland present in our body that performs excretory functions is

1. thyroid

2. liver

3. hypothalamus

4. lungs