stimulus

Turbellarian

...the organ ism from a substrate . releaser Simple stimulus that elicits an innate behavior pattern. Full article >>> embryo produced by spiral cleavage , character ized by the absence of a blastocoel ; formed by embryo s of annelid worms, turbellarian flatworms, nemertean worms, and al...

Tropism

...tion is determined by the direction from which the stimulus strikes the plant . Full article >>>...he movement of plant parts toward or away from a stimulus in the plant 's environment . Plant movement in response to an environment al stimulus. PICTURE...

Transduction

...s by which a cell converts one kind of signal or stimulus into another. Full article >>> Signal transduction of transmembrane receptor s that are ion channel s 3.1.4 Signal transduction of transmembrane receptor s on change of trans membrane potential ... Full article >>&...

Signal transduction

...s by which a cell converts one kind of signal or stimulus into another. Full article >>> Chapter 9 Presenilin function: connections to Alzheimer's disease and signal transduction Paul E.Fraser*1, Gang Yu*,Lyne Lvesque*, Masaki Nishimura*, Dun-Sheng Yang*,Howard T.J. Mount*,David Westaway* a...

Resting potential

...ential. A neuron membrane is hyperpolarised if a stimulus increases its voltage from the resting potential of -70mV, ... Full article >>>...

Reflex arc

...f nervous activity; involved in the detection of a stimulus in the environment by sensory nerve endings, followed by impulses that travel via the sensory neurons to the spinal cord . Full article >>> reflex arc Pathway of neuron s, effector(s) and sensory receptor s that participate in...

Receptor

...across the receptor membrane proportional to the stimulus strength. Full article >>> Receptor may refer to: In telecommunication, a receiver. In physiology , a sensory receptor is any structure which, on receiving environment al stimuli, produces an informative nerve impulse . Full a...

Peptides

...thway A mechanism linking a mechanical or chemical stimulus to a cellular response. Full article >>> Protease An enzyme that degrades proteins to peptides or amino acids . Proteolysis The degradation of proteins to peptides or amino acids catalyzed by proteases. Full article ...

Optic nerve

... two optic nerve s meet and cross over, so that a stimulus from either eye is interpreted in the optic lobe of the opposite side of the brain. Full article >>> The innermost layer of the vertebrate eye, containing photo receptor cells (rods and cones) and neuron s; trans mits images forme...

Nostril

... enters. nastic movement A plant 's response to a stimulus in which the direction of the response is independent of the direction of the stimulus. Non-directional plant movements. Full article >>> blowhole The nostril s, or nasal openings, of cetaceans. blubber The fat found between the ski...

Microscope

...is rapid development of a response to a particular stimulus at an early stage of development. Full article >>> Thousands of probe DNA s are spotted or synthesized on microscope slides. Sample RNA s are labeled with fluorescent dyes. Gene expression levels in the sample are detected by ...

Long

...tinue to fire at an elevated rate, even though the stimulus has returned to normal. View QuickTime Movie LTP Mechanisms ... Full article >>> long -day plant A plant that flower s when the length of day exceeds some critical value. longevity The length or duration of life; compare to surv...

Insulin

...because it, not growth hormone , is the immediate stimulus for growth of the body. Growth hormone released from the anterior lobe of the pituitary ... Full article >>> insulin A hormone secreted by the pancreas that stimulates the uptake of glucose by body cells . Insulin works an...

Imprinting

...is rapid development of a response to a particular stimulus at an early stage of development. Full article >>> Genetic Imprinting Some genes are express ed only from the maternal chromosome , while others genes are express ed only from the paternal chromosome . Full article >>...

Illuminator

...is rapid development of a response to a particular stimulus at an early stage of development. Full article >>> When ethidium bromide stained gels are photographed on a UV trans illuminator a UV filter is required to screen out the background UV from the trans illuminator. Ethidium bromide ...

Class

...ioning A type of learning whereby an unconditioned stimulus (US) that elicits a specific response (unconditioned response [UCR]) is paired with a neutral stimulus (becomes ... Full article >>> A class of retrovirus es that cause a cell to beco...

Chiasma

... two optic nerve s meet and cross over, so that a stimulus from either eye is interpreted in the optic lobe of the opposite side of the brain. Full article >>> This creates a Holliday structure or half chiasma . The branch represented by the half chiasma can migrate (3). Resolution of...

Action potential

...rring when a nerve cell membrane is exposed to a stimulus that exceeds its threshold. Full article >>> action potential - rapid, trans ient, self-propagating electrical excitation in the plasma membrane of a cell such as a neuron or muscle cell ... Full article >>> ...

Action

...rring when a nerve cell membrane is exposed to a stimulus that exceeds its threshold. Full article >>> action potential - rapid, trans ient, self-propagating electrical excitation in the plasma membrane of a cell such as a neuron or muscle cell ... Full article >>>...