Feedback Loops

detect blood pressure

detect chemicals like drugs, hormones, or neurotransmitters

regulates thirst

regulates sleep

regulates hunger

regulates temperature

regulates heart rate

regulates breathing

regulates blood pressure

detect pain

detect changes in osmolarity, water and ion concentrations

regulates blood glucose

only found in the retina

detect light

detect stretching

detect touch, pressure, vibration

detect temperature