Home
Class 12
BIOLOGY
Assertion : Mucous membrane immobilises ...

Assertion : Mucous membrane immobilises the micro-organisms in the body.
Reason : Microoganisms and dust particles entering the respiratory tract are trapped in the mucus.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertin is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Innate immunity is non-specific type of defence, that is accomplished by providing different types of defence, that is accomplished by providing different types of barries to the entry of the foregin agents into our body. Mucus coating of the epithelium lining in the respiratory, gastrointestinal and urogenital tracts traps microbes and prevents their entry in our body.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Opioids help to enhance respiratory activity. Reason : Opioids are the drugs which binds to specific opioid receptors present in respiratory tract.

Assertion : IgG is the most abundant class of Igs in the body. Reason : IgG is mainly found in sweat, tears, saliva, mucus, colostrum and gastro intestinal secretions.

Assertion :Digested and semi-digested food is absorbed by body surface in tapeworms. Reason: Digestive organs are absent in tapeworms.

Assertion : Plants have no specialised respiratory organs. Reason : There is very little transport of gases from one plant part to another.

Assertion : There is a sharp decline in dissolved oxygen downstream from the point of sewage discharge. Reason : Microoganisms ionvolved in biodegradation or organic matter in the receiving water body consume a lot of oxygen.

Assertion: The spaces left between soil particles are called pore spaces. Reason: Many organism like bacteria, fungi etc, exist in the soil.

Assertion : Heavy metals and persistent pesticides pass into the food chain and increase in amount per unit weight of the organism at successive trophic levels. Reason : Heavy metals and persistent pesticides can be easily metabolised by the organism's body.

Assertion (A): spleen is a primary lymphoid organ Reason (R ):Primary lymphoid organs trap antigen and destroy them.

Assertion : The primary germ layers are formed during gastrulation. Reason: The body organs are formed from primary germ layers.