Tag: biology

The internal movements are performed by the involuntary muscles. The involuntary muscles function on their own and cannot be controlled willingly. The cardiac muscles are the involuntary muscles which are responsible for the pumping of the heart. The heart pumps and supplies the oxygenated blood to the different tissues in the body. The smooth muscles are responsible for carrying out peristalsis in the tube like structures of the alimentary canal. This movement helps in propelling the food in the forward direction. Both these muscles are of the involuntary type. 

• Nervpus system is divided into two types CNS and peripheral nervous system.
• The peripheral nervous system is in turn divided into the somatic nervous system and autonomic nervous system.
• The autonomic nervous system regulates the internal and involuntary movement.For example,respiration,cardiovascular,digestive etc.
• The autonomic(visceral) nervous system is again divided into the sympathetic and parasympathetic nervous system.
• Hence the sympathetic and parasympathetic are  part of nervous system regulates the internal and involuntary movement,
• So, the correct answer is 'Both A and B'.

Skeletal muscle is the most abundant of the human body's tissue. It consists of thread-like cells, of which the longest can be up to 30cm long and 0.15mm thick, that are bound together into strands by collagen filaments. So, the muscular tissue is abundant as it has around 700 muscles, which constitutes around 40% of total body weight.
So, the correct answer is option B.

In living cells, energy for immediate use is stored as molecules of ATP or adenosine triphosphate. When the energy is used, one of the phosphates attached to ATP is released, giving ADP or adenosine diphosphate. it is known as the energy currency of a cell and these are produced in the mitochondria. So, the correct answer is option B.

A fibroblast is a type of cell that is responsible for making the extracellular matrix and collagen.

• The large muscle of the upper arm flexes the arm and powerfully twists the forearm, turning the palm upward.
  
• This muscle extends from the head of the head of the humerus over the elbow to the ulna bone to help flex the elbow, and also enables pronation of the forearm.

Tendons connect muscles to bones. They are a type of connective tissue. They are strong with limited flexibility.

Glycoprotein, elastin, and collagen secretion by rat smooth muscle cells. Smooth muscle cells from rat heart secreted extracellular matrix components at high rates for many generations in culture. So the correct option is 'Muscle tissue'.