Tropism is a postural change toward or away from the stimulus.
Taxis is simple orientation movement of entire organism toward or away from the stimulus.
Phototaxis in Euglena (response to light):
p. 199 Chemotaxis in Paramecium (response to chemical stimulus):
Thigmotaxis in Brown Planaria (response to touch) p. 200
Use dissecting microscope to observe: do these flatworms respond to touch at different locations (anterior, pharynx, posterior)?
Reflexes are innate, automatic responses in animals with a nervous system.
Blink p. 201
Suggestion: in addition to snapping fingers, do another trial tossing cotton balls at the subject wearing goggles.
Subject should shut eyes and be unaware when the experimenter strikes the knee.
Suggestion: Do another set of trials with the subject's eyes open and knowing when the strikes occur; try to suppress any knee jerk reflex.
Learning requires a complex, central nervous system.
Can you solve a line maze faster after some trials? Repeat until at least 2 error-less trials. p. 202
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