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_______ tissues are sheetlike with one free surface.
| a. Epithelial | b. Connective | c. Nervous | d. Muscle |
Introduction:
Muscle, connective, epithelial, and nervous tissue are the four basic types of animal tissues. These tissues are joined together in structural units to perform a common function of composing different organs.
Answer to Problem 1SA
Correct answer:
Epithelial tissues are sheet-like with one free surface. Hence, the correct answer is option a.
Explanation of Solution
Reason for correct answer:
Option a. is given as, “Epithelial.”
Epithelial tissues are associated with a sheet-like group of cells. The epithelial tissues cover the external body areas and internal cavities. They produce substances that help them attach to the connective tissue beneath them and form the basement membrane. Besides this, they are freely exposed to the environment on the other side.
Reason for incorrect answer:
Option b. is given as, “Connective.”
The connective tissues are not so tightly packed as epithelial tissues. The structure of connective tissue consists of cells, fibers and ground substance. They are characterized by the absence of sheet-like surface free at one end. Hence, option b. is incorrect.
Option c. is given as, “Nervous.”
Nervous tissue acts as the messenger in the nervous system. The structure of nervous tissue comprises of neurons and neuroglial cells which help in the transfer of nerve impulse. They do not have any free surface. Hence, option c. is incorrect.
Option d. is given as, “Muscle.”
The muscle tissues are present inside the body with no free surface. Muscle tissues are of different types, and each muscle has a specific role in the body of an organism. Hence, option d. is incorrect.
Hence, the options b., c., and d. are incorrect.
The sheet-like tissues with one free surface are known as epithelial tissues. Thus, the correct answer is option a.
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Chapter 28 Solutions
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