How does the nervous tissue cause action? ANS. When a nerve impulse reaches the muscle,the muscle fibre must move by changing their shape. this is possible as muscle cells have special proteins that change both their shape and arrangement in the cell in response to nervous electrical impulses.
How does the nervous tissue cause action?
When a nerve impulse reaches the muscle the muscle fibre must move. … Muscle cells have special proteins that change both their shape and their arrangement in the cell in response to nervous electrical impulses. When this happens new arrangements of these proteins give the muscle cells a shorter form.
How does nervous tissue maintain muscle movement?
Movements of the body are brought about by the harmonious contraction and relaxation of selected muscles. Contraction occurs when nerve impulses are transmitted across neuromuscular junctions to the membrane covering each muscle fibre.
How does the nervous tissue cause action Meritnation?
Nervous tissue has an ability to generate an electrical impulse in response to stimuli and to rapidly transmit the electrical impulse from the site of the origin along their length in a particular direction. … Stimulus-induced permeability to Na+ is short-lived, and is quickly followed by permeability to K+.
How are nervous tissues protected class 10?
A bony box known as cranium covers the brain. The brain is covered by three protective layers called meninges. The space between the meninges is filled with a fluid called cerebrospinal fluid. This fluid protects the brain against shocks and mechanical injuries.
What are the 3 types of nervous tissue?
Neurons, or nerves, transmit electrical impulses, while neuroglia do not; neuroglia have many other functions including supporting and protecting neurons.
What is nervous tissue and its function?
Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.
What are two differences between nervous and muscle tissue?
Muscle and nervous tissues rely on electrical activity to function. Muscle tissue generates force to provide movement, and nervous tissue is responsible for transmitting electrical and chemical signals throughout the body. Muscle and nervous tissues are considered excitable tissues.
What is nervous tissue and its function Class 9?
Nervous or the nerve tissue is the main tissue of our nervous system. It monitors and regulates the functions of the body. Nervous tissue consists of two cells: nerve cells or neurons and glial cells, which helps transmit nerve impulses and also provides nutrients to neurons.
What type of muscle tissue is only found in the heart?
Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.
What protects the nervous tissue?
Your nervous system has lots of protection. Your brain is guarded by your skull, and your spinal cord is shielded by small bones in your spine (vertebrae) and thin coverings (membranes). They’re both cushioned by a clear fluid called cerebrospinal fluid.
How are the tissues protected?
The principle function of epithelial tissues are covering and lining of free surface. The cells of the body’s surface form the outer layer of skin. Inside the body, epithelial cells form the lining of the mouth and alimentary canal and protect these organs.
How are nervous organs protected?
First, the entire CNS is enclosed in bone. The brain is protected by the skull, while the spinal cord is protected by the vertebra of the spinal column. The brain and spinal cord are both covered with a protective tissue known as meninges.