Essential Biology E2 Perception of Stimuli
Due Date:
Candidate Number: 002171-
Student Name:
Blog resource:
http://tinyurl.com/4qczhor
Click4Biology: http://click4biology.info/c4b/E/E2.htm
Cite all sources using the CSE method (or ISO 690 Numerical in Word). The first example has been done for you.
Highlight all objective 1 command terms in yellow and complete these before class. Highlight all objective 2 and 3
command terms in green – these will be part of the discussions in class. After class, go back and review them.
1. Complete the table below to outline four main types of receptors and the stimuli they detect:
Receptor
Stimulus
Examples
Mechanoreceptor
Pressure
Texture
Vibration
Touch, pain and tension in skin
Touch receptors in skin
Inner ear for hearing and balance (1)
Thermoreceptor
Chemoreceptor
Photoreceptor
2. TOK link – To what extent is our perception of the world limited by our receptors?
Research some examples of animals with different ranges of stimuli – or even completely
different stimuli altogether!
3. Label the structures of the human eye with their names and functions:
Stephen Taylor
Bandung International School
http://sciencevideos.wordpress.com
Essential Biology E2 Perception of Stimuli
Student Name:
Due Date:
Candidate Number: 002171-
4. Label the section of the retina below:
5. Annotate the diagram below to outline how light stimulus is received by the photoreceptor and
converted to an action potential:
6. Compare rod and cone cells:
Rod cells
Cone cells
Light brightness
Diversity of cells
Wavelength sensitivity
Impulse: neuron ratio
distribution
Stephen Taylor
Bandung International School
http://sciencevideos.wordpress.com
Essential Biology E2 Perception of Stimuli
Student Name:
Due Date:
Candidate Number: 002171-
7. Explain how visual stimuli are processed in the eye and brain, with reference to the following
stages (you can draw or find images to help, if you wish):
a. Image focusing and inversion in the cornea and retina
b. Visual fields
c. Contralateral processing and the role of the chiasma
d. The role and location of the visual cortex in the brain
e. Edge enhancement and ‘filling in’ of the blind spot
Stephen Taylor
Bandung International School
http://sciencevideos.wordpress.com
Essential Biology E2 Perception of Stimuli
Student Name:
Due Date:
Candidate Number: 002171-
8. Label the diagram with the structures of the ear, and use the diagram to explain how sound is
perceived by the ear.
Extra reading:
Mantis Shrimps have a unique way of seeing:
http://scienceblogs.com/notrocketscience/2008/03/mantis_shrimps_have_a_unique_way_of_seeing.php
Further thought:
1. How does colour blindness work, from both a genetic and neurological perspective?
2. What are risk factors in hearing and vision loss and how can they be mitigated?
3. Research the use of stem cells and gene therapy in restoring vision to those who have been
blinded or who have blindness due to genetic factors.
Stephen Taylor
Bandung International School
http://sciencevideos.wordpress.com
Essential Biology E2 Perception of Stimuli
Due Date:
Candidate Number: 002171-
Student Name:
Works Cited
1. Taylor, Stephen. Perception of Stimuli (presentation). Science Video Resources. [Online] Wordpress,
2010. http://sciencevideos.wordpress.com/options/option-e-neurobiology-and-behaviour/e2perception-of-stimuli/.
2. Allott, Andrew. IB Study Guide: Biology for the IB Diploma. s.l. : Oxford University Press, 2007. 978-019-915143-1.
3. Mindorff, D and Allott, A. Biology Course Companion. Oxford : Oxford University Press, 2007. 978099151240.
4. Clegg, CJ. Biology for the IB Diploma. London : Hodder Murray, 2007. 978-0340926529.
5. Campbell N., Reece J., Taylor M., Simon. E. Biology Concepts and Connections. San Fransisco :
Pearson Benjamin Cummings, 2006. 0-8053-7160-5.
6. Burrell, John. Click4Biology. [Online] 2010. http://click4biology.info/.
7. IBO. Biology Subject Guide. [Online] 2007. http://xmltwo.ibo.org/publications/migrated/productionapp2.ibo.org/publication/7/part/2/chapter/1.html.
Self Assessment:
Essential Biology
Criterion
Presentation &
Organisation
Academic
Honesty
Objective 1
understanding
Objective 2
understanding
Objective3
understanding
Logic, notation,
mathematical
working
Further research
Assessment
Complete (2)
Partially complete (1)
NA
Complete and neat. All command terms
highlighted, tables and diagrams well presented.
Self
Sources cited using the CSE (ISO 690 numerical)
method, with Works Cited section complete and
correct.
All answers for the following command terms
Most answers for the following command terms
correct:
correct:
Define
Draw
Label
List
Measure State
Most answers for the following command terms
All answers for the following command terms correct:
correct:
Annotate Apply
Calculate Describe Distinguish Estimate Identify
Outline
Most answers for the following command terms
All answers for the following command terms correct:
correct:
Analyse Comment Compare Construct Deduce Derive Design Determine Discuss
Evaluate
Explain Predict
Show Solve
Sketch Suggest
Answers are presented in a logical and concise
manner. SI units used most times, with correct unit
NA
symbols and definitions of terms. All mathematical
working shown.
Evidence is apparent of research and reading beyond
the textbook and presentations to find correct
NA
answers to challenging questions. If any questions
are unanswered, this criterion scores zero.
NA
Total (max 10):
Stephen Taylor
Bandung International School
http://sciencevideos.wordpress.com
MrT