Question

Which are the characteristics of skeletal muscles?
A. Cylindrical, striped and branched
B. Cylindrical, striped and uninucleate
C. Spindle, unbranched and uninucleate
D. Cylindrical, syncytial and unbranched

Answer 1

Hint: Skeletal muscle is one of three forms of muscle found in the human body, along with visceral and cardiac muscles. Skeletal muscle is a type of muscular tissue that is connected to the bones and has a role in the function of many body components. These muscles are also known as voluntary muscles since they are controlled by the neurological system.
Properties-
Extensibility refers to a muscle's ability to lengthen when stretched.
Elasticity refers to a muscle's capacity to revert to its previous shape after being released.
Excitability refers to a muscle's ability to respond to stimuli.
Contractility refers to a muscle's ability to contract when it comes into touch with a stimulus.

Complete answer:
Option A: Cardiac muscle cells are found in the heart's walls, are striated, and are controlled involuntarily.
So, option A is incorrect.
Option B: Striped muscles, also known as skeletal muscles, are cylindrical and voluntary.
So, option B is incorrect.
Option C: Unbranched, cylindrical, and syncytial, striated skeletal muscle. A multinucleated mass of cytoplasm that has not been split into separate cells is characterised as a syncytial cell.
So, option C is not correct.
Option D: A striated skeletal muscle is unbranched, cylindrical, and syncytial. Syncytial cells are defined as a multinucleated mass of cytoplasm that has not been divided into discrete cells.
So, option D is correct.

Hence, Option D is the correct answer.

Note:
Muscle is a type of soft tissue that can be found in both animals and people. Muscle cells are made up of actin and myosin protein filaments that slide past one another, causing contraction and changing the length and shape of the cell.
Because of the structure of particular muscles or the contraction of muscles that look like a moving mouse, the name muscle is derived from the Latin word "musculus," which means "small mouse".
Types of Muscles- There are three types of muscles
1. Skeletal or striated muscles
2. Cardiac muscles
3. Smooth muscles
Based on the muscle action, muscles are further classified into:
1. Voluntary muscles
2. Involuntary muscles