Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Biology: Visual System
Actions for '5. Visual System'
Subscribe
Hide Description
It's easy to get swamped in details about the visual system. (This animation may help.)
Discuss the visual pathways that originate in the retina and "ascend" to the visual cortex via the thalamus.
In this week's resources the retina is revealed as more than a screen for images. Light falls on different classes of photoreceptors, rods and cones, which organize light stimulation according to their pigments by intensity and wavelength. From the duplex nature of the retina there arises a tradeoff between greater acuity in the center and greater sensitivity in the periphery. The output of the retina is further organized into receptive fields, and sideways connections between the photoreceptors and horizontal cells sustain lateral inhibition that sharpens contrasts. A retinotopic map is preserved by the visual pathways all the way to the visual cortex; on the other hand, the image still requires a lot of interpretation by the brain.
Yet when we look at the world we notice only the rich panorama of detail that relayed to the brain via the fovea.
Questions (answer one)
How is the retina different from a movie projection screen? Try to be specific.
How on earth did we end up with eyes that are mostly peripheral retina and only tiny foveas? Should a sensible retina have more foveas-or larger ones, perhaps? Or might peripheral retina be more than leftover real estate?
You are a writer for "Consumer Reports" magazine and you are asked to design an experiment to evaluate the effectiveness of three brands of whitening strips for teeth
What would you expect to happen to the virulence of lyme disease in humans if the pathogen that cause it ( a spirochete bacterium) were to become sexually transmissible between humans?
Diagram an angiosperm seed. Identify the tissue or cell that each part is derived from. Distinguish between diotyledonous and monocotyledonous seeds; albuminous and exalbuminous seeds. Explain what happens in ripening and after-ripening.
What are the two most important measures of central tendency for fully under- standing the distribution of data and the distribution's meaning?
When does the synaptonemal complex disappear?
q. 1a noda and numa in 1984 isolated the first voltage-gated sodium channel gene from the electric organ of the
Determine which of the following is not a function of membrane proteins? Selective permeability of the membrane is primarily determined by membrane phospholipids.
the original concentration in a sample is 2.79*10^6 CFU/ml. which sample volume should yield a countable plate? (express your answer as 10^x mL.)
What is the role of this organization in modern healthcare leadership? What professional growth opportunities do they offer their members? Would you personally consider a career path involving Healthcare Financial Management Association (HFMA)? Wh..
The population of the county was 204,500 at the beginning of the year and 215,000 at the end of the year. What was the incidence rate of lyme disease in Chittenden County in 1994? What type of incidence rate is this?
What are the alleles of a gene locus when there are are more than two alternatives in a particular population?
Why can glucogenic amino acids be used to make glucose, while ketogenic ones cannot?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd