Problem 19 - Objective Biology for NEET

Question

Which of the following functions of compound epithelium is minimal? (a) Protection (b) Secretion (c) Absorption (d) Both (b) and (c)

Step-by-Step Solution

Answer

The function of compound epithelium tissue that is minimal is absorption, so the correct answer is (c).

Step 1: Understanding the compound epithelium

The compound epithelium is a type of tissue that primarily serves two functions which are protection and secretion. It forms the skin and the lining of body cavities. It protects against wear and tear, damage, and microbial infection.

Step 2: Analyzing the options

Based on our understanding, we can see that options (a) protection and (b) secretion are one of the main functions of compound epithelium. This means these options are unlikely to be the one with minimal function. On the other hand, (c) absorption is not a primary function of compound epithelium. It is carried out to a less extent.

Step 3: Identifying the correct option

The question asks for the minimal function. Hence, the remaining option (d) Both (b) and (c) can be disregarded as secretion is a main function. Therefore, the answer is option (c) Absorption which isn't a primary role of the compound epithelium.

Key Concepts

Tissue Functions

The compound epithelium plays a crucial role in various bodily functions. While discussing tissues, it is vital to understand that tissues are collections of similar cells that work together to perform specific tasks.
This type of epithelium is composed of multiple cell layers, which makes it resilient and able to withstand wear and tear.

• Protection: Compound epithelium primarily protects underlying structures from harm.
• Secretion: It can produce and release substances like enzymes or hormones.
• Absorption: Although not a primary function, it can absorb substances to a limited extent.

By fulfilling these roles, compound epithelium helps maintain the proper functioning of body systems.

Protection

Protection is one of the key functions of the compound epithelium. Given its structure of multiple layers, this tissue efficiently guards internal organs and tissues from external damage.

• It forms a tough barrier that defends against mechanical injury, preventing harm from friction or pressure.
• The multiple layers also act as a shield against microbial invasions, keeping infections at bay.
• In areas like the skin, it helps to prevent dehydration by reducing water loss.

The durability of compound epithelium makes it an essential component of protective surfaces in the body.

Secretion

Though not as prominent as in simple epithelial tissue, secretion is still a significant function of compound epithelium.

• This type of epithelium can produce various substances, including mucus and enzymes, which are crucial in different physiological processes.
• The secretions offer lubrication necessary for the normal functioning of body cavities and organs.
• Moreover, secretion can also aid in protecting surfaces by creating a barrier against pathogens.

Therefore, while it may have a lesser role in secretion compared to tissues specifically adapted for this purpose, its contributions are valuable in supporting bodily functions.

Absorption

Absorption in compound epithelium is minimal compared to other tissues like simple epithelium. The layers of cells are generally designed for protection, which limits their absorptive capabilities.

• This tissue is less specialized in absorbing nutrients or substances as its main role is to defend and protect.
• However, it might still absorb some smaller molecules or ions from the surfaces it lines, albeit inefficiently.
• This limited absorption is beneficial in specific locations where protection is more critical than absorption.

Understanding that absorption is not a primary function highlights why this tissue is strategically located where abrasion resistance is more essential.