Chapter 14 Flashcards
Coordination and response (8 cards)
Gravitropism
A response in which parts of a plant grow towards or away from gravity
Homeostasis
The maintenance of a constant internal environment
Hormone
A chemical substance, produced by a gland and carried by the blood, which alters the activity of one or more specific target organs
Phototropism
A response in which parts of a plant grow towards or away from the direction of the light source
Reflex action
A means of automatically and rapidly integrating and coordinating stimuli with the responses of effectors (muscles and glands)
Sense organ
A group of receptor cells responding to specific stimuli, such as light, sound, touch, temperature and chemicals
Synapse
A junction between two neurones
Set point
The physiological value around which the normal range fluctuates
