D. an egg is released from the ovary; it travels down the fallopian tube to the uterus, where it implants; if speed are present, a pregnancy begins.
The answer to this question is PHYSICAL DEVELOPMENT
The changes that occur in body size, proportion and strength start from early childhood and continues into puberty (where there are rapid changes) and adolescence. <span>This development is asynchronous, that is, the body systems differ in their pattern of growth.</span>
Answer:
root square
Explanation:
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Answer:
Adenosine.
Explanation:
Adenosine is a neurotransmitter that is created in the brain and when it binds to the adenosine receptors, it slows down nerve activity and it creates a sensation of drowsiness.
<u>Caffeine</u> looks like adenosine to the receptors, therefore, when we have caffeine, <u>it binds to these receptors and there is no room left for the adenosine to bind</u>. However, the caffeine doesn't slow down nerve activity but, in the contrary, it speeds it up.
Therefore we can tell that caffeine blocks the receptors for the adenosine thus promoting wakefulness.
