Question

A muscle that moves jointed parts away from each other is what type? Give an example of this type of muscle.

Answer 1

Ans: In our body, there are three types of muscles present ie, cardiac muscle, smooth muscle, and skeleton muscle. Cardiac muscle and smooth muscle are the involuntary muscle and it doesn't attached to the bone. Skeleton muscle is the voluntary muscle which is attached to the bone and causes the movement of the body. Smooth muscle present in the blood vessel maintains the diameter of the vessel, gastrointestinal tract causes the movement of food within the tract, in the urinary bladder to pushing out the urine, regulates the airflow. Cardiac muscle present in the heart by the contraction of muscle blood is pumped throughout the body.
Skeleton muscle responsible for the movement of jointed parts away from each other. It is present in the pair and attached to either side of bone by the strong cord. This strong cord is a hard or tough band of connective tissue which attached to the muscles to a bone called Tendons. The contraction of the skeleton muscle against the skeleton causes the movement of bone or joints. During contraction, skeleton muscle becomes shorter, which causes pulling of bone lead to movement of the body. Pair of skeleton muscle work in opposite directions. These muscles show's the only contraction and after contraction, muscles back to a neutral position or relax position. Movement of each muscle in pair in opposite directions causes contraction and bending of joints known as a flexor. Movement of muscles for the straightening of joints known as an extensor. During flexor or extensor, one muscles contract and other muscles elongated in each pair of skeleton muscle.
Examples: biceps and triceps muscle which work opposite directions at the same time. Biceps muscles contract and causes the bending of elbow and triceps muscle relaxed at the same time, in this situation biceps muscles is flexor and triceps muscle is an extensor.
The knee muscles quadriceps and hamstrings, they also work together but in opposite directions. During bending of the knee, quadriceps contract and act as flexor at the same time

Hamstrings muscles in relax condition which acts as an extensor. During straightening of leg hamstrings muscles contract and act as a flexor, and in same time quadriceps relax which act as an extensor.