In the model of motivation, all organisms are motivated to maintain physiological equilibrium around an optimal set point, the ideal, fixed setting of a particular physiological system.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Examine the air pressure map. which type of line is shown on the map?

To take a whiff of your favorite food, you use both? a. motor nerves and your digestive system b. sensory nerves and your immune system c. motor nerves and your skeletal system d. sensory nerves and your respiratory system