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Summary Kognity Chapter 14 Pre IB Biology STUDY GUIDE
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Kognity Chapter 14 Pre IB Biology STUDY GUIDE
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Chapter 14 Review1. What is the name for the system of nerves that exists outside the brain and
spinal cord and carries information between the body and the central
nervous system?
a. The peripheral nervous system caries information between the body
and the central nervous system.
2. Fill in the blanks:
A nerve impulse triggers the release ofnerve impulsesinsideaxon
terminalsat one side of the synapse, which then diffuseacross the
synapticgapto bind withreceptor moleculeson theother side of the
synapse, causing the impulse to move inthe otherdirection.
. Fill in the blanks:
3
When you are looking at a bus across the street, theciliary musclesin your eyes
relax. This makes the tension in the suspensory ligaments of the eyeincrease
and your lens becomessharperand less curved, soit focuses the image on the
retina.
. Define each term:
4
a) State the scientific term suitable for the following descriptions:
b) A transparent curved layer of the eye that helps to refract light through the
pupil:iris
c) A specialised type of cell with greater sensitivity for dim light:pupil
d) Structure of the eye that controls the amount of light that enters:Cornea
e) The antagonistic action of iris muscles in response to high light intensity:
pupil/iris reflex
5. The diagram below shows how the human eye is able to focus light from
far and near objects.
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