Question

Unstriped muscles are found in
A)Neck
B)Urinary bladder
C)Arms
D)Fingers

Answer 1

Hint: Unstriped muscles are small and exhibit the shape of a spindle. The unstriped muscles are also called unstriated muscles or involuntary muscles.

Complete answer:
Before we find the correct answer, let us know a little more about muscles. Muscles are composed of cells or fibres which contract in order to produce movement of the body. There are three types of muscles,
Cardiac muscle
Smooth muscle
Skeletal mucle
Option A: Levator scapulae, trapezius, erector spinae, deep cervical flexors, etc are some of the neck muscles. These are mostly grouped under skeletal muscle. Therefore, this is the incorrect option.
Option B: Unstriped muscles, also known as the smooth muscles contract in absence of any conscious control thereby forming thin sheets or layers. These unstriped muscles are formed of spindle-shaped and unstriated cells possessing single nuclei. Such cells are found within the walls of the internal organs such as bladder, stomach, blood vessels, and intestine. All these organs are capable of exhibiting rhythmic involuntary contraction. Therefore, this is the correct option.
Option C: Triceps brachii, brachialis, biceps brachii, etc are some of the arm muscles. Therefore, this is the incorrect option.
Option D - Fingers are devoid of muscles. Therefore, this is the incorrect option.

Thus, the correct option is (B) urinary bladder.


Note: Unstriped muscles or as they are known smooth muscles contract without conscious control. Thus, analyse the given options and look for the option which is not under or conscious control, i.e. it is involuntary and you will find your answer.