The right answer is <span>Refractory period.
At the moment when the action potential is emitted, the fiber being depolarized, it is impossible to depolarize it again. It is, therefore, necessary to wait until the membrane potential returns to a value below the critical threshold in order to be able to excite it again. We are thus led to distinguish two periods that characterize its excitability.
An absolute refractory period: during which any stimulation, even supraliminal, is ineffective since the fiber is already depolarized.
A relative refractory period: during which a second action potential can be omitted provided that the depolarization produced by the excitation reaches the critical threshold, which implies that it is more important since the value of the resting potential has not been restored yet.</span>
90% of the available energy is lost in some form of heat, transferring light energy into different living organisms
Answer:
Solid
Explanation:
A radio device is a solid type of matter.
- Matter is anything that has weight and occupies a space
- There are three main categories of matter which are solid, liquid and gas
- A solid state of matter is made up of substances with a definite volume and a fixed shape.
- A radio has a fixed shape. Most of the come in a solid cuboidal or cube shape
- The volume of this three dimensional body can be measured which connotes the space it occupies at any given time.
- The mass of the radio can be taken using a balance.
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