✨explain the terms in biology(muscle topic) in a easy way....
a)all or none rule
b)muscle twitch
c)muscle tone
d)points about muscle phosphogens
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Answer:
a) The all-or-none law is the principle that the strength by which a nerve or muscle fibre responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response; otherwise, there is no response.
b) A twitch occurs when one muscle fiber contracts in response to a command (stimulus) by the nervous system. The time between the activation of a motor neuron until the muscle contraction occurs is called the lag phase (sometimes called the latent phase).
c) In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle's resistance to passive stretch during resting state. It helps to maintain posture and declines during REM sleep.
d) A compound found in animal tissues that provides a reserve of chemical energy in the form of high-energy phosphate bonds. ... During tissue activity (e.g. in muscle contraction) phosphagens give up their phosphate groups, thereby generating ATP from ADP. The phosphagens are then reformed when ATP is available.