Response - Response to Stimuli: Key Terms Flashcards
Taxis
A simple response whose direction is determined by the direction of the stimulus
Kinesis
A non-directional response to a stimulus which brings about increased random movements
Tropism
A growth movement of a part of a plant in response to a directional stimulus
Indoleacetic acid (IAA)
An auxin (a plant growth factor) which is produced in small quantities and controls plant cell elongation
Plant growth factors
Hormone-like substances which control plant responses to external stimuli
Photo
A prefix meaning light
Geo
A prefix meaning gravity
Hydro
A prefix meaning water
Chemo
A prefix meaning chemical
Rheo
A prefix meaning movement
Central nervous system
The brain and spinal cord
Peripheral nervous system
Pairs of nerves that originate from either the brain or spinal cord to the rest of the body
Neurone
Specialised cells adapted to rapidly carrying electrochemical changes called nerve impulses from one part of the body to another
Sensory neurones
Neurones which carry nerve impulses from receptors towards the CNS (an intermediate or motor neurone)
Motor neurones
Neurones which carry nerve impulses away from CNS (an intermediate or relay neurone) to an effector
