Question

Strongest muscle in the body is present in
A) Arm
B) Jaw
C) Thigh
D) Neck

Answer 1

Muscle is soft tissue whose cells contain protein filaments of myosin and actin. Muscles function for changing posture, maintaining locomotion, producing force and for movement of internal organs like contraction of Heart as well as movement of food by the digestive system.

Complete answer:
The three types of muscle tissue are:
Skeletal muscle:- Average adult male consists of 42% skeletal muscle while an average adult female consists of 36%. Also known as voluntary muscle.
Smooth muscle:- It is located within esophagus, stomach, uterus, bronchi, bladder, blood vessels and intestine. It is also known as involuntary muscle.
Cardiac muscle:- It is found in the Heart.
Masseter, is the most superficial and strongest muscle of mastication. It is powerful in herbivores to help in chewing of plant matter. It is thick, deep and quadrilateral which consists of two heads.
It consists of:
->Superficial head- larger, fibers pass inferior and posterior.
->Deep head- smaller, more muscular which arises from posterior third of lower border. Fibers pass downward and forward.
->Innervations- masseter is innervated.
->The strongest muscle based upon weight is the masseter muscle (for chewing) of the jaw.

Hence the correct answer is option ‘B’.

Note: The function of the masseter muscle is during bilateral contraction of the whole muscle to elevate the mandible and raise the lower jaw. Elevation of the mandible takes place during the jaws closing. This muscle has clinical significance: 1) Examination and 2) Pathology.