Option A: A.4 Innate and learned behaviour Flashcards
Innate Behaviour
behavior inherited from parents and so develops independently of environmental context. They are controlled by genes. Genetically programmed behaviours, which ensure the survival of the animal.
Taxis
a directed response to a stimulus. If the animal’s body is directed towards the stimulus, we say it has a positive response. If away, negative response.
Chemotaxis
response to chemicals in the environment. .
Phototaxis
the response to light.
Gravitaxis
response to gravity.
Rheotaxis
response to water current
Thigmotaxis
response to touch
Planaria
a flatworm that lives in lakes and ponds, quite active and moves by contraction of muscle fibers in its body.
Euglena
single-celled protist, has a flagellum. Makes its own food by photosynthesis because it contains molecules of chlorophyll. It is positively phototaxis because it needs light to perform photosynthesis.
Kinesis
a movement in response to a non-directional stimulus, such as humidity. The rate of movement of an animal depends on the intensity of the stimulus, not its direction.
Orthokinesis
when an organism moves slowly or rapidly (changes speed) in response to a stimulus, but it does not move towards the stimulus.
Klinokinesis
when an organism turns slowly or rapidly in response to a stimulus, but it does not move towards the stimulus.
Pain Reflexes
involves a series of nerves that run from your arm to your spinal cord, and back to your arm muscle (if your arm is in pain). You do not control reflexes with your brain, they are controlled by the autonomic nervous system.
Reflex Arc
composed of a receptor cell, a sensory neurons, a relay neurone in the spinal cord, and a motor neurons which carries the message to the effector (muscle).
Effector
an organ that performs the response