Question

question 10
1 pts
which of the following is not a principal type of tissue?
cardiac
epithelial
nervous
connective
muscle
question 11
1 pts
cells in a tissue are surrounded by or embedded in a complex extracellular material called a
membrane.
matrix.
cytoplasm.
lymph.
question 12
1 pts
the epidermis is composed of several types of epithelial cells. one type, called keratinocytes, become filled with a tough, fibrous protein called
melanin.
keratin.
stratum lucidum.
eleidin.

Explanation:

• Question 10: The four principal types of tissue in the body are epithelial, connective, nervous, and muscle. Cardiac is a type of muscle tissue, not a principal - type on its own.
• Question 11: Cells in a tissue are surrounded by or embedded in an extracellular matrix. A membrane is a different structure, cytoplasm is inside the cell, and lymph is a fluid in the lymphatic system.
• Question 12: Keratinocytes in the epidermis become filled with keratin, a tough, fibrous protein. Melanin is a pigment, stratum lucidum is a layer of the epidermis, and eleidin is a precursor to keratin in some layers.

Answer:

Question 10: A. cardiac
Question 11: B. matrix
Question 12: B. keratin