Are chemicals released by the body that block the release or uptake of neurotransmitters necessary to transmit pain sensations to the brain. hyperalgesics endogenous opiates corticosteroids algesic opiates

What feature of cell theory is best demonstrated in the image

Dan made the table shown to describe two different relationships between animals. organism interactions relationship a relationship b one organism lives inside the organism it feeds off no organism is harmed which of the following statements is most likely correct?

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.