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Principle of univariance
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Principle of univariance The absorbtion of a long wavelength (low frequency, low energy) quantum has the same effect on a receptor as the absorbtion of a short wavelength (high frequency, high energy) quantum. It is the probability of absorption that changes photoreceptor sensitivity.
RELATED TERMS--------------------------------------
Receptor
A molecule that recognizes a unique hormone. Once that hormone is bound to the receptor, the information carried by the hormone can now exert its biological action.
Absorption
The way nutrients from food move from the small intestine into the cells in the body.
Photoreceptor
A light sensitive neuron. Photoreceptors interact with light which produces changes in their electrical properties which are communicated to other neurons. They constitute the first stage in the physiological process which underlies vision. The human retina, like the retina of most vertebrates, contains two broad classes of photo-receptors, rods and cones.
SIMILAR TERMS--------------------------------------
Prince George's Hospital Center
Prince George's Hospital Center is a hospital in Cheverly, Maryland (USA).
Prince William Health System
Prince William Health System is a hospital in Manassas, Virginia (USA).
Princess Margaret Hospital for Children
The Princess Margaret Hospital for Children is a hospital in Subiaco, Western Australia, Australia.
Principen
Principen is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 125
Principen 125 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 250
Principen 250 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 500
Principen 500 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen with probenecid
Principen with probenecid is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate; probenecid.
Prinivil
Prinivil is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): lisinopril.
Prinzide
Prinzide is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): hydrochlorothiazide; lisinopril.
PREVIOUS AND NEXT TERMS--------------------------------------
Pool hypothesis
Hypothesis for the mechanism for stereopsis. Suggests the visual system contains three pools, one for crossed disparities, one for uncrossed disparities and one for non-zero disparities. A particular depth is signaled by the relative activity of crossed and uncrossed pools rather than by a sharply tuned neuron coding a particular depth.
Pop-Out
Target items in a visual search that have features which allow them to be detected quickly regarless of the nummber of distractors presents are said to "pop-out".
Post stimulus time histogram
A method for examining cell response to a particular stimulus. The time after stimulus onset is divided into a number of bins. The stimulus is then presented repeatedly and the count in each bin increased each time the cell fires during that time bin.
Prelunate cortex
Area V4 in rhesus monkey brain.
Pretectal area
Midbrain area just rostral to the superior colliculus. Receives input from the optic tract. Projects bilaterally to the preganglionic parasympathetic neurons of the accessory oculomotor nucleus. Mediates pupillary light reflexes.
Principle of univariance
Prosopagnosia
A loss of the ability to identify members of complex categories such as faces.
Psychophysical function
A plot showing the variation in threshold (e.g. the dimmest light required for response) with some stimulus dimension (e.g. wavelength).
Posterior parietal cortex
Concerned with the perception of the spatial relations among objects.
Panniculitits
A rare, multifactorial inflammatory condition involving subcutaneous fat.
Panniculus
A layer of membrane.
RELATED TERMS--------------------------------------
Receptor
A molecule that recognizes a unique hormone. Once that hormone is bound to the receptor, the information carried by the hormone can now exert its biological action.
Absorption
The way nutrients from food move from the small intestine into the cells in the body.
Photoreceptor
A light sensitive neuron. Photoreceptors interact with light which produces changes in their electrical properties which are communicated to other neurons. They constitute the first stage in the physiological process which underlies vision. The human retina, like the retina of most vertebrates, contains two broad classes of photo-receptors, rods and cones.
SIMILAR TERMS--------------------------------------
Prince George's Hospital Center
Prince George's Hospital Center is a hospital in Cheverly, Maryland (USA).
Prince William Health System
Prince William Health System is a hospital in Manassas, Virginia (USA).
Princess Margaret Hospital for Children
The Princess Margaret Hospital for Children is a hospital in Subiaco, Western Australia, Australia.
Principen
Principen is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 125
Principen 125 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 250
Principen 250 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen 500
Principen 500 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate.
Principen with probenecid
Principen with probenecid is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): ampicillin-ampicillin trihydrate; probenecid.
Prinivil
Prinivil is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): lisinopril.
Prinzide
Prinzide is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): hydrochlorothiazide; lisinopril.
PREVIOUS AND NEXT TERMS--------------------------------------
Pool hypothesis
Hypothesis for the mechanism for stereopsis. Suggests the visual system contains three pools, one for crossed disparities, one for uncrossed disparities and one for non-zero disparities. A particular depth is signaled by the relative activity of crossed and uncrossed pools rather than by a sharply tuned neuron coding a particular depth.
Pop-Out
Target items in a visual search that have features which allow them to be detected quickly regarless of the nummber of distractors presents are said to "pop-out".
Post stimulus time histogram
A method for examining cell response to a particular stimulus. The time after stimulus onset is divided into a number of bins. The stimulus is then presented repeatedly and the count in each bin increased each time the cell fires during that time bin.
Prelunate cortex
Area V4 in rhesus monkey brain.
Pretectal area
Midbrain area just rostral to the superior colliculus. Receives input from the optic tract. Projects bilaterally to the preganglionic parasympathetic neurons of the accessory oculomotor nucleus. Mediates pupillary light reflexes.
Principle of univariance
Prosopagnosia
A loss of the ability to identify members of complex categories such as faces.
Psychophysical function
A plot showing the variation in threshold (e.g. the dimmest light required for response) with some stimulus dimension (e.g. wavelength).
Posterior parietal cortex
Concerned with the perception of the spatial relations among objects.
Panniculitits
A rare, multifactorial inflammatory condition involving subcutaneous fat.
Panniculus
A layer of membrane.
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This dictionary contains 19186 terms.
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