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eye in Biological Definition

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 ...
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Other TagslacksJailCivilOther Tagsalterations 2alterations 3alterations 4alterations 5alterations 6alterations 7deliberate 2recognition 2recognition 3recognition 4recognition 5recognition 6recognition 7recognition 8recognition 9recognition 10similarity 2higher 2higher 3higher 4higher 5higher 6higher 7higher 8higher 9higher 10estimate 2estimate 3estimate 4estimate 5estimate 6estimate 7estimate 8war 2processes 2processes 3processes 4processes 5processes 6processes 7processes 8processes 9processes 10neurodegenerative 2neurodegenerative 3neurodegenerative 4neurodegenerative 5neurodegenerative 6