Answer
Verified
377.7k+ views
Hint: Stratum germinativum (also called stratum basale) is the deepest epidermal layer consisting of a single row of basal cells, or germinative cells, that are undergoing rapid mitotic divisions. There are two types of cutaneous glands found in the dermis: sebaceous glands and sweat glands.
Complete Answer:
The stratum germinativum is the deepest epidermal layer. It provides the germinal cells necessary for the regeneration of the layers of the epidermal layers. Basal cells can act like stem cells due to their ability to divide and produce new cells. These are sometimes called basal keratinocyte stem cells. The cell division here is mitotic. Sebaceous glands are visible from the 13th to the 16th week of fetal development and develop from the same tissue that gives rise to the epidermis of the skin. Likewise, sweat glands are also an extension of epidermis. This indicates that both the stratum germinativum and the cutaneous glands have arisen from the epidermis which follows mitotic cell division to expand.
Thus, option (A), both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Note:
Sebaceous glands or oil glands are present all over the skin, except on the palms of the hands and the soles of the feet. The sweat glands are widely distributed over the skin and assists in the heat regulation of the body. The stratum germinativum is a single layer of columnar or cuboidal basal cells that are attached to each other and are overlying stratum spinosum cells by desmosomes and hemidesmosomes.
Complete Answer:
The stratum germinativum is the deepest epidermal layer. It provides the germinal cells necessary for the regeneration of the layers of the epidermal layers. Basal cells can act like stem cells due to their ability to divide and produce new cells. These are sometimes called basal keratinocyte stem cells. The cell division here is mitotic. Sebaceous glands are visible from the 13th to the 16th week of fetal development and develop from the same tissue that gives rise to the epidermis of the skin. Likewise, sweat glands are also an extension of epidermis. This indicates that both the stratum germinativum and the cutaneous glands have arisen from the epidermis which follows mitotic cell division to expand.
Thus, option (A), both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Note:
Sebaceous glands or oil glands are present all over the skin, except on the palms of the hands and the soles of the feet. The sweat glands are widely distributed over the skin and assists in the heat regulation of the body. The stratum germinativum is a single layer of columnar or cuboidal basal cells that are attached to each other and are overlying stratum spinosum cells by desmosomes and hemidesmosomes.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Which are the Top 10 Largest Countries of the World?
Give 10 examples for herbs , shrubs , climbers , creepers
Difference Between Plant Cell and Animal Cell
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
Change the following sentences into negative and interrogative class 10 english CBSE
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE