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Nerve fibres conduct impulses in
If a nerve impulse was initiated somewhere in the middle of a nerve fibre, it would proceed to both ends. However,in the synapse, the progagation is strictly one-way from the axon to the dendrite and never the reverse.
The most appropriate definition of Neuroglial cells are that they are
Nissl’s granules are found in cyton of nerve cells. These have affinity for basic dyes. The granules are made up of
Most of the neurons of our body are
Multipolar neurons have several dendrites and one axon.Most neurons in the brain and spinal cord of our body are of this type.
Bipolar nerve cells are present in –
Which of the following possesses nodes of Ranvier?
Actin filament is made up of
One this filament probably contains 300-400 actin molecules about 50 tropomyosin and 50 troponin. It is said that tropomyosin plays a vital role in sensitizing the contractile proteins (action and myosin) to calcium ions.
Most of the digestion in cockroach occurs in
Contraction of muscles is the best example of conversion of cellular energy into
“Oxygen debt” is amount of oxygen required for
During active work, the rate of oxygen supply by the lungs falls short of requirement of the muscles. Hence,lactic acid accumulates in the muscles and the breathing gradually becomes hard to enhance O2 intake by the lungs. This is called oxygen debot.