The Idea that Electrons are spread evenly throughout the atom. Rutherford disproved this by aiming charged alpha particles through a piece of gold foil. The result allowed for scientists to realize that there was a cloud of electrons surrounding the nucleus, rather than being evenly distributed throughout it.
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Answer:
There are two types of endoplasmic reticulum: rough endoplasmic reticulum (rough ER) and smooth endoplasmic reticulum (smooth ER). Both types are present in plant and animal cells. The two types of ER often appear as if separate, but they are sub-compartments of the same organelle.
Explanation:
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Answer:
Adrenal medulla
Explanation:
Fight-or-flight or acute stress response is marked by physical changes, including nervous and endocrine changes, that prepare human or an animal to react or retreat. This response was first discovered by an American Physiologist, Walter Bradford Cannon.
In response to an acute stress, an area of the brain called AMYGDALA sends an emergency signal to the HYPOTHALAMUS, which acts like a command center and activates the body's sympathetic nervous system by releasing hormones. The sympathetic nervous system stimulate the adrenal medulla gland, triggering the release of CATECHOLAMINES (Epinephrine/adrenaline and Norepinephrine/noradrenaline) into the bloodstream.
This release induces several physiological changes in the body; The heart beats faster than normal; pushing blood to the muscles, heart and the vital organs, increased in blood pressure, blood sugar (glucose) are released into the bloodstream to give us the extra energy we need.
<span>The esophagus runs behind the windpipe (trachea) and heart</span>
Water temperature for handwashing should be at least 100˚F (38˚C) , option "A" Helps it removes oils from the hand that can hold bacteria
<h3>How many seconds should the handwashing process take?</h3>
Lather your hands by patting them together with the soap. Lather the backs of your hands, between your fingers, and under your nails. Scrub your hands for minimum 20 seconds.
Thus, option "A" is correct, Water temperature for handwashing should be at least 100˚F (38˚C).
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