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antiseptic1488 [7]
3 years ago
13

According to the nebular hypothesis, when did nuclear fusion begin?

Biology
1 answer:
sergiy2304 [10]3 years ago
6 0
There is evidence that Emanuel Swedenborg<span> first proposed parts of the nebular hypothesis in 1734.</span>[3][4] Immanuel Kant<span>, familiar with Swedenborg's work, developed the theory further in 1755, publishing his own </span>Universal Natural History and Theory of the Heavens, wherein he argued that gaseous clouds (nebulae<span>) slowly rotate, gradually collapse and flatten due to </span>gravity<span>, eventually forming </span>stars<span> and </span>planets.<span>[2]</span>
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Explanation:

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if the stimuli are delivered to the contracting muscles more frequently and ther is no time for relaxqtion
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If the stimulus frequency is so high that the relaxation phase disappears completely, contractions become continuous in a process called complete tetanus.

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  • When the motor neuron that innervates a skeletal muscle generates action potentials at an extremely rapid rate, a persistent muscular contraction known as a tetanic contraction is induced.
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Learn more about the Nervous system with the help of the following link:

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