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Coordination and Response

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  • What is the name of the muscles and ligaments involved in the eyes ability to focus on near and far objects?
    Ciliary muscles and suspensory ligaments
  • Give an example of a sense receptor
    photo receptor
  • What is the fovea?
    Part of the retina with the most photo receptors (mostly cones)
  • Which muscle causes the pupil to narrow?
    Circular muscles
  • What is the function of the optic nerve?
    carries impulses to the brain
  • Where is the blind spot?
    Where the optic nerve is attached to the retina
  • What is the function of the retina?
    contains light receptors, some sensitive to light of different colours.
  • What is a reflex action?
    automatically coordinating stimuli that leads to a response
  • Which eye muscles are responsible for controlling light intensity?
    circular and radial muscles
  • Name three types of neurons
    motor, relay, sensory
  • Focusing on near objects: Explain what happens to the lens, ciliary muscles, and suspensory ligaments
    lens thickens, ciliary muscles contract, suspensory ligaments relax
  • What type of images can cone receptors produce?
    color
  • Focusing on far objects: Explain what happens to the lens, ciliary muscles, and suspensory ligaments
    lens flattens, ciliary muscles relax, suspensory ligaments are tight
  • Give an example of a sense organ
    Eye, ear, skin, nose
  • What is accommodation of the eye?
    the eye's ability to adjust its focus to see objects clearly at different distances.
  • What is a sense organ?
    a group of receptors that are able to respond to a stimulus.
  • Which muscles cause the pupil to widen?
    radial muscles
  • What is the function of the cornea?
    refracts light and provide protection
  • Name the two systems of the nervous system
    central and peripheral
  • What is the function of the iris?
    controls how much light enters the pupil
  • What type of images can rod receptors produce?
    black and white
  • What is the role of the nervous system?
    coordination and regulation
  • What is the function of the lens?
    focuses light on to the retina
  • Explain the path nerve signals travel during a reflex arc
    sensory receptor to sensory neuron to relay neuron to motor neuron to effector
  • name the two major parts of the central nervous system
    spinal cord, brain
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