an animal that does not have internal control over its body temperature

effector gland

structure of the endocrine system that releases hormones in the body


animal that is warm-blooded and maintains a constant internal body temperature independent of temperature changes in the environment


the body's processes to physiologically regulate its internal environment with response to fluctuations that occur in the internal or external environment

homeostatic imbalance

the inability to maintain balance, which will affect normal functions in the body, leading to a disease, disorder, or even death

negative feedback

a homeostatic feedback system that counteracts a stimulus by inhibiting the direction of the stimulus


homeostatic process of maintaining water and salt balance in the body

osmotic pressure

a type of pressure generated as water moves across a membrane due to osmosis

positive feedback

a homeostatic feedback system that maintains a stimulus, often increasing the action of a stimulus

set point

a value where the physiological state of the body is stable

stimulus (plural, stimuli)

a change in the internal or external environment contributing to fluctuations that occur away from the set point


the regulation of a body's internal temperature