Excretory Products and Their Elimination

Q.

Difference between Pepsin and trypsin

Q.

Carbon dioxide is a waste byproduct of cellular respiration. This is removed out of the body by the.

1. lungs
2. kidney
3. heart
4. skin

Q.

The amount of urine output per day by a normal human being is

1. 3-4 L
2. 4-5 L
3. 1-1.8 L
4. 0.5-0.75 L

Q.

What is PCT?

Q.

The removal of nitrogenous waste from the body.

Q. In humans, urea is formed in .

1. kidney
2. liver
3. pancreas
4. urinary bladder

Q. Refer to the diagram of a nephron and answer the questions. [5 MARKS]

(a) Where does ultrafiltration occur?
(i) 1 (ii) 3 (iii) 2 (iv) 5

(b) Where is most of the water reabsorbed into the blood stream?
(i) 4 (ii) 5 (iii) 3 (iv) 7

(c) Where is most of the glucose reabsorbed?
(i) 4 (ii) 5 (iii) 6 (iv) 7

(d) Which structure helps to concentrate urine and is very long in desert mammals such as the kangaroo rat?
(i) 1 (ii) 2 (iii) 5 (iv) 6

(e) Which structure contains urine?
(i) 4 (ii) 5 (iii) 6 (iv) 7

Q.

Do Marine fish excrete ammonia or urea?

Q. Name any three excretory organs and also the substances excreted by the named organs. [3 MARKS]

Q.

Difference between

TRYPSIN

AMYLASE

LIPASE

PEPSIN

Q.

The highest inorganic constituent of urine

1. Creatinine

2. Urea

3. Uric acid

4. Sodium chloride

Q.

Which of the following are nitrogenous wastes?

1. Urea

2. Uric acid

3. All of the above

4. Ammonia

Q. Nitrogenous waste products are generated in the body during digestion and breakdown of .

1. carbohydrates
2. vitamins
3. proteins
4. fats

Q. Match the following organs/components with the elements which they help in excreting: $\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Lungs}& \text{a. Low amount of nitrogenous waste}\\ \text{ii. Sebaceous secretion}& \text{b. Sodium chloride and lactic acid}\\ \text{iii. Sweat}& \text{c. Hydrocarbons, sterols and waxes}\\ \text{iv. Saliva}& \text{d. Carbon dioxide}\end{array}$

1. i).➡ a ., ii).➡ c., iii).➡ b., iv).➡ d

2. i).➡ d., ii).➡ c., iii).➡ b., iv). ➡ a

3. i).➡b., ii).➡ c., iii).➡ d., iv). ➡ a

4. i).➡ a., ii).➡ d., iii).➡ b., iv). ➡ c

Q. The nitrogenous waste in mammals is excreted in the form of .

1. uric acid
2. urea
3. ammonia
4. amino acids

Q. The multicellular organisms remove excretory products by the process of simple diffusion.

1. When the pH of the urine decreases.
2. When the peritubular capillaries are dilated.

Q. Process of removing nitrogenous waste products out of the body is called __________.

1. excretion
2. egestion
3. metabolism
4. digestion

Q.

Mention main components of urine

Q.

The highest organic constituent of urine is

1. Urea

2. Creatinine

3. Uric acid

4. Sodium chloride

Q. What is edema??

Q.

Choose the ODD one out of the following terms given and name the CATEGORY to which the others belong:

(i) Bile, Urea, Uric acid, Ammonia

Q. Gastric juice of infants contains:

1. Nuclease, pepsinogen, lipase
2. Pepsinogen, lipase, rennin
3. Amylase, rennin, pepsinogen
4. Maltase, pepsinogen, rennin

Q.

In comparison to blood plasma, percentage of glucose in glomerular filtrate is ________ .

1. Nil

2. Equal

3. Lower

4. Higher

Q.

The hormone that helps increase the reabsorption of water from the kidney tubules.

1. Vasopressin or Antidiuretic hormone (ADH)

2. Insulin

3. None of the above

4. Glucagon

Q. _______________Rich diet results more urea in urine [ ]

A) ​​​carbohydrates
B) fats
C)​​​vitamins
D) proteins

Q. Which of the following statements is/are false?

(I) Urine is hypertonic in distal convoluted tubule.
(II) When urine passes into the collecting tubule, it becomes hypotonic.
III) Urine is isotonic in proximal convoluted tubule.
(IV) Urine becomes more and more hypotonic as it passes down the Henle’s loop.

1. II and III
2. I only
3. I and IV
4. I, II and III

Q.

After learning the chapter excretion what habits you would like to change or follow for proper functioning of kidneys?

Q. Of the following, which one is not an accessory excretory organ?

1. Lungs
2. Liver
3. Skin
4. Kidney

Q. Name three organic and three inorganic constituents of the glomerular filtrate. [3 MARKS]

Q.

Abscission of leaves is an example of ______ in plants.

1. transpiration

2. reproduction

3. excretion

4. respiration