Pick up a new cotton swab, and run it all over your hands, between your fingers and under your nails. Rub the swab in a zigzag pattern over the second petri dish, and cover it with the lid. Label the petri dish “hand washed.” Dispose of the cotton swab. Store these petri dishes at room temperature. Write down your observations at 24 hours and 48 hours.

Which of the following summarizes the role of the hypothalamus? it connects the endocrine and nervous systems and controls the pituitary gland. it controls the rate at which cells burn fuels from food to produce energy. it produces glucagon and insulin to control glucose levels in the blood. it releases adrenaline as a response to fear, stress, and excitement.