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Assertion : Surface of skin is impervious to water.
Reason : Surface of skin is covered by stratified cuboidal epithelium.
Reason : Surface of skin is covered by stratified cuboidal epithelium.
- 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 Assertion is true but Reason is false.
- d)If both Assertion and Reason are false.
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Assertion : Surface of skin is impervious to water.Reason : Surface of...
Surface of skin is impervious to water because it is covered by stratified keratinised squamous epithelium. This epithelium has many superficial layers of horny, scale like remains of dead squamous cells and several deeper layer of living polygonal cells. Heavy deposits of the insoluble protein keratin are present in the dead superficial layers which makes this epithelium impervious to water. Stratified cuboidal epithelium, on the other hand, lines the inner surface of sweat gland, larger salivary and pancreatic ducts.
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Assertion : Surface of skin is impervious to water.Reason : Surface of...
Understanding the Assertion and Reason
The assertion states that the surface of the skin is impervious to water, which is indeed true. The outermost layer of the skin, known as the stratum corneum, is composed of dead keratinized cells that create a barrier, preventing water from penetrating the skin. This property is crucial for maintaining hydration and protecting the body from external elements.
Analyzing the Reason
The reason provided is that the surface of the skin is covered by stratified cuboidal epithelium. However, this is incorrect. The epidermis, which is the outer layer of the skin, is primarily composed of stratified squamous epithelium, not stratified cuboidal epithelium. This type of epithelium is designed for protection against abrasion and water loss.
Conclusion
Given this analysis:
- Assertion: True – The skin is indeed impervious to water due to the properties of the stratum corneum.
- Reason: False – The skin surface does not consist of stratified cuboidal epithelium.
Therefore, the correct answer is option 'C': Assertion is true but Reason is false.
This distinction is important in understanding the structure and function of the skin in maintaining the body's homeostasis and providing a protective barrier.
The assertion states that the surface of the skin is impervious to water, which is indeed true. The outermost layer of the skin, known as the stratum corneum, is composed of dead keratinized cells that create a barrier, preventing water from penetrating the skin. This property is crucial for maintaining hydration and protecting the body from external elements.
Analyzing the Reason
The reason provided is that the surface of the skin is covered by stratified cuboidal epithelium. However, this is incorrect. The epidermis, which is the outer layer of the skin, is primarily composed of stratified squamous epithelium, not stratified cuboidal epithelium. This type of epithelium is designed for protection against abrasion and water loss.
Conclusion
Given this analysis:
- Assertion: True – The skin is indeed impervious to water due to the properties of the stratum corneum.
- Reason: False – The skin surface does not consist of stratified cuboidal epithelium.
Therefore, the correct answer is option 'C': Assertion is true but Reason is false.
This distinction is important in understanding the structure and function of the skin in maintaining the body's homeostasis and providing a protective barrier.
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Assertion : Surface of skin is impervious to water.Reason : Surface of skin is covered by stratified cuboidal epithelium.a)If both Assertion and Reason are true andReason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reasonis not the correct explanation of Assertionc)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?
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