Question

A muscle which is spindle shaped and lacks striations are known as

A. Smooth muscle

B. Cardiac muscle

C. Striated muscles

D. None of the above.

Answer 1

Hint: Muscle tissue is a pulpy tissue that forms most of the tissues in the muscles of the human muscular system. It is the only kind of tissue that has cells with the ability to contract. Cells of soft muscle tissue do not have sarcomeres, but the cells shrink in the similar usual way as striated muscle cells. 

Complete answer:

To answer this question, first, we need to know about the muscle tissue. Muscle tissue is formed of cells which have the specific ability to small or contract in manner to do movement of the different body parts. The tissue is highly cellular and is well supplied with blood vessels. The cells are long and slender so they are sometimes called muscle fibers, and these are usually arranged in bundles or layers that are surrounded by connective tissue. Actin and myosin are contractile proteins in muscle tissue.

Now, let us find the solution from the option.

Muscle tissue can be categorized into skeletal muscle tissue, smooth muscle tissue, and cardiac muscle tissue.

>Smooth muscle tissue – they are rod-shaped, one centrally present nucleus, involuntary and absence of striations.

>Cardiac muscle tissue - has branching fibres, one nucleus per cell, striated and involuntary.

>Skeletal muscle tissue – they are cylindrical, multinucleated, voluntary and striated.

 Thus, the correct option is A. i.e. Smooth muscle.

 

Note: Muscle tissues are contractile or can be shortened means they can generate a pushing or pulling up power. When linked between two movable things, that means, shortening of the muscles and bones result in the bones to change position. Some muscle motion is voluntary that determines it is under awareness.