Other Forms of Excretion

Q.

Describe the role of liver, lungs and skin in excretion.

Q.

What is the composition of sweat produced by sweat glands?

Q. Read the assertion and reason carefully to mark the correct option in question.

Assertion: Sweat glands help in removal of sterols, hydrocarbons and waxes.

Reason: Sebaceous glands eliminate certain substances like NaCl, small amount of urea and lactic through sebum.

1. If both assertion and reason are false.
2. If both assertion and reason are true and the reason is the correct explanation of the assertion.
3. If both assertion and reason are true but reason is not the correct explanation of the assertion.
4. If the assertion is true but the reason is false.

Q.

Which of the following is not a function of the mammalian liver?

1. Detoxification of the blood

2. Regulation of blood glucose levels

3. Preparation of nitrogenous wastes for disposal through urine

4. Production of the enzyme pepsinogen

Q. What is the meaning of uricotelic?

Q.

Name the excretory product excreted by the liver.

Q.

Which of the following is not an excretory product in animals?

1. Uric acid

2. Urea

3. Ammonia

4. Hydrochloric acid

Q. Match the following and choose the correct option :
$\begin{array}{cc}\text{A. Kidney}& \text{1.}C{O}_2+H_{2}O\\ \text{B. Lungs}& \text{2. Bile}\\ \text{C. Liver}& \text{3. Sweat and sebum}\\ \text{D. Skin}& \text{4. Urine}\end{array}$

1. A-4, B-3, C-2, D-1
2. A-1, B-3, C-2, D-4
3. A-4, B-1, C-2, D-3
4. A-3, B-1, C-2, D-4

Q. Wharton’s duct is present in

1. Parotid gland
2. Sublingual gland
3. Submaxillary gland
4. Pancreatic gland

Q.

A large quantity of one of the following is removed from our body by lungs.
(a) $C{O}_2$ $H_{2}Oonly$
(c) $C{O}_2$ and $H_{2}O$ (d) ammonia

Q. “Mind influences our immune system through ___A_____________ and _______B______ which results in maintenance of our health as per biology.”

1. A - neural system, B - endocrine system
2. A - cardiovascular system, B - neural system
3. A - endocrine system, B - cardiovascular system
4. A - excretory system, B - cardiovascular system

Q.

An organ that produces urea in humans beings is the

1. kidney

2. liver

3. lung

4. urinary bladder

Q.

The lungs are important organs for excretion of:

1. Urea

2. Ammonia

3. Carbon dioxide

4. Water

Q.

Write about apocrine sweat glands.

Q.

Fill in the blanks appropriately
$\begin{array}{cc}Organs& Excretorywastes\\ \left(a\right)Kidneys& \cdots \\ \left(b\right)Lungs& \cdots \\ \left(c\right)Liver& \cdots \\ \left(d\right)skin& \cdots \end{array}$

Q.

Besides urination, another important activity in which water is substantially lost from the body is:

1. Salivation

2. Defecation

3. Expiration

4. Inspiration

Q. What is the role of liver in excretion in mammals?

Q.

How does the regulation of temperature by the skin controlled?

Q. Sodium oxalate prevents blood clotting due to

1. Combining with calcium ions of blood
2. Blocking of fibrinogen transformation
3. Inhibiting activity of clotting factor of plasma
4. Covering RBC

Q. Which one is not an excretory organ?

1. Skin
2. Kidneys
3. Liver
4. Intestine

Q. Arrange the following forms of nitrogenous wastes in increasing order of toxicity.

1. Ammonia < Urea < Uric acid
2. Urea < Uric acid < Ammonia
3. Uric acid < Urea < Ammonia
4. Ammonia < Uric acid < Urea

Q. Write the role of liver in excretion.

Q.

What happens when the temperature of the body drops due to external cold?

Q.

State whether the following statement are true false.

(iii) Increased body heat causes vasoconstriction.

1. True
2. False

Q. Briefly explain the role of lungs, liver and skin as excretory organs.

Q. Failure to metabolise tyrosine and phenylalanine results in

1. pyuria
2. dysuria
3. alkaptonuria
4. hematuria

Q. Assertion :During physiology of excretion, deamination does not take place in liver. Reason: Deamination is a process to make use of excess of amino acids which can not be incorporated into protoplasm.

1. Both assertion and reason are correct and reason is the correct explanation for assertion.
2. Both assertion and reason are correct but reason is not the correct explanation for assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion is incorrect but reason is correct.

Q.

Fibrinogen is formed in

1. Bone marrow

2. Lungs

3. Liver

4. WBCs

Q. In humans, urea is formed in

1. kidney
2. ureter
3. liver
4. spleen

Q. Regulation of body temperature in a homeotherm during high environmental temperature would involve

1. Constriction of blood vessels of skin
2. No change in blood vessels of skin
3. Dilation of blood vessels of skin
4. Decreased flow of blood without any change in blood vessels of skin