Albinism
... to the sun as a result. Lack of melanin in the
eye often results in problems with vision, as the
eye will not develop properly without the pigment.
... not pink like in some animals, and the human
eye is too deep for the pupil to appear red rather ...
Eye
... This article refers to the sight organ. See
eye (disambiguation) for other usages.
... have the same anatomy as a human eye.
An
eye is an organ that detects light . Different ...
1 Varieties of
eye
2 Focusing
3 Convergence
4 Ocular ...
Muscle
... each contraction.
The external muscles of the
eye are conspicuously large and strong in relation to ... to be "100 times stronger than they need to be."
eye movements, however, are and probably "need" to be ... Alaska optometric association (External
eye muscles "100 times as strong as they need to ...
Vestibular system
... (Fig 3). Using these direct connections,
eye movements lag the head movements by
less than 10 ... any more. As a consequence, no compensatory
eye movements are generated, and the patient cannot ... signal. Most of the utricular signals elicit
eye movements, while the majority of the saccular ...
Optical spectrum
... spectrum that is visible to the human
eye . There are no exact bounds to the optical spectrum; a typical human
eye will respond to wavelengths from 400 to 700 nm , ... from 380 to 780 nm . A light -adapted
eye typically has its maximum sensitivity at ~555 ...
Anatomy
... Brain
Breast
Colon or large intestine
Diaphragm
Ear
eye
Heart
Kidney
Labia
Larynx
Liver
Lung
Nose
... human body:
Abdomen
Arm
Back
Buttock
Chest
Ear
eye
Face
Genitals
Head
Joint
Leg
Mouth
Neck
...
Brain
... The arthropod brain consists of a large opitical lobes behind each
eye for visual processing and a central brain with three divisions. The ... and the tritocerebrum. The optical lobes are positioned behind each
eye and process visual stimuli (Butler, 2000). The protocerebrum contains the ...
Homunculus
... that has been done is to place an entire person, or homunculus, behind the
eye who gazes at the retinas. A more sophisticated argument might propose ... In Search of Frankenstein. Warner Books, New York.
Gregory, R.L. (1990)
eye and Brain: The Psychology of Seeing, Oxford University Press Inc. New ....
Microscope
... for viewing objects that are too small to be seen by the naked or unaided
eye . The science of investigating small objects using such an instrument is ... being produced to this day, but suffers from a small field size, and the
eye relief is uncomfortably close compared to modern widefield oculars.
...
Phenotype
... and constitution, or a specific manifestation of a trait, such as size or
eye color, that varies between individuals. Phenotype is determined to some ... (it doesn't take chemistry or sequencing to determine a person's
eye color), classical genetics uses phenotypes to deduce the functions of ...
Anton van Leeuwenhoek
... correspondence was translated by Hooke into Latin and published in the proceedings of the Royal Society .
" No more pleasant sight has met my
eye than this of so many thousands of living creatures in one small drop of ... " - Stated after his discovery of the microscopic world over three ...
Biophysics
... PCR amplification, gel blotting, fluorescence labeling and in vivo staining are used so that experimental results are observable with an unaided
eye or, at most, optical magnification . Using these techniques, biologists attempt to elucidate the complex systems of interactions that give rise ...
Chromosome
... female sexual characteristics are present but underdeveloped. People with Turner syndrome often have a short stature, low hairline, abnormal
eye features and bone development and a "caved-in" appearance to the chest.
XYY syndrome
Triple-X syndrome
You can find a detailed graphical ...
Cilium
... Opposite to the motile cilia, non-motile cilium usually exists as one cilium per cell. The outer segment of the rod photoreceptor cell in the human
eye is connected to its cell body with a specialized non-motile cilium. The terminal fiber of the olfactory neuron is also a non-motile cilium, where ...
Diabetes mellitus
... person suffers a problem frequently caused by diabetes, such as a heart attack , stroke , neuropathy , poor wound healing or a foot ulcer, certain
eye problems, certain fungal infections , or delivering a baby with macrosomia or hypoglycemia .
Criteria for diagnosis
Diabetes mellitus is ...
Warm-blooded
... ocean, down to where the water is quite cold. Swordfish are able to raise the temperature of their brains and eyes in cold water, allowing for faster
eye movements when hunting. Tuna are able to warm their entire bodies through a heat exchange mechanism called the rete mirable, which helps keep heat ...
Gene
... species' population. Variants of a single gene are known as alleles , and differences in alleles may give rise to differences in traits, for example
eye color. A gene's most common allele is called the wild type allele, and rare alleles are called mutants .
Normally, RNA is an intermediate ...
Gene therapy
... and the cells that have been successfully treated with it. Several trials with AAV are on-going or in preparation, mainly trying to treat muscle and
eye diseases, the two tissues where the virus seems particularly useful.
Problems and ethics
For the safety of gene therapy, the Weismann ...
Olfaction
... range by electron tunnelling . This would allow encoding of odors to be similar to the way wavelengths of light are encoded by cones of the
eye . Currently, only vibration theory can explain why a molecule containing hydrogen atoms (such as decaborane , B 10 H 14 ) and one containing ...
Protozoa
...
Amoeboids
Sporozoans: Apicomplexa , Myxozoa , Microsporidia
Ciliates
Most protozoans are too small to be seen with the naked
eye - most are around 0.01-0.05 mm , although forms up to 0.5 mm are still fairly common - but can easily be found under a microscope. Protozoa are ...
Rudolf Steiner
... Revolution .
In his epistemological works, he espoused the Goethean notion that thinking itself is a perceptive instrument for ideas, just as the
eye is a perceptive instrument for light.
He characterized his system of Anthroposophy as follows:
"Anthroposophy is a path of knowledge, to ...
Signal transduction
... by a hormone can activate many downstream effector proteins. For example, a rhodopsin molecule in the plasma membrane of a retina cell in the
eye that was activated by a photon can activate up to 2000 effector molecules (in this case, transducin ) per second. The total strength of signal ...
Thomas Hunt Morgan
... among the red-eyed wild types . He bred this white-eyed fly with a red-eyed female. Their progeny were all red-eyed, suggesting that the white
eye trait was recessive. Morgan thus named the gene white , starting the tradition of naming genes after their mutant allele . As Morgan continued to ...