What does it mean to what does it mean to characterize a nebula as diffuse? (1 point) O It reflects only visible radiation.
O It reflects only non-visible radiation.
O Its edges have clear boundaries.
O Its edges do not have clear boundaries.

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels