SENSORY AND MOTOR MECHANISM

• SENSORY IN ANIMALS

  Sensory information is conveyed and perceived by the following:

  • the presence of a physical stimulus that would allow certain reactions.
  • the transduction of the stimulus into electrochemical impulses in the sensory receptors
  • the transmission of action potentials in sensory neurons; and
  • the interpretation of the stimulus perceived by the central nervous system.
• SENSORY AND MOTOR MECHANISMS OF PLANTS

  Plants react to light, chemicals, gravity, water, and even touch. The ability of plants to respond to a certain stimulus is known as tropism.
• PHOTOTROPISM

  Movement of the plant in response to light, usually in the direction toward the light
• GEOTROPISM

  Movement of the plant in response to gravitational force.

  • Negative geotropism - when the plant part moves away from Earth
  • Positive geotropism - when the plant part moves toward Earth
• HYDROTROPISM

  Movement of the plant in response to water.
• THIGMOTROPISM

  Movement of the plant in response to mechanical stimulation.