Syphilis is transmitted through sexual actions through small cuts, for malaria, it would have to be through mixing of blood from a contaminated source to a uncontaminated source.
If a researcher electrically stimulates the reticular formation in an animal, the animal will immediately wake up and be alert. Its purpose is to have some control of sensory signals and thus has the ability to alert the body when it is tired or needs to be awake.
When molecules are being transported opposite to the molecules concentration gradient.
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I think the answer is D. Circulatory because this system helps to get the absorbed nutrients throughout the whole body
