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Uric acid, a kairomone type excreted by birds and reptiles. Birds and reptiles secrete uric acid, a metabolite that can be considered a kairomone. This compound can be used by the lone star tick (Amblyomma americanum) to locate its hosts. Instead of being attracted to the source, the tick's response is arrestment, ensuring it remains in areas ...
Plants lack a central nervous system so they rely on a decentralized system of chemical messengers. This allows them to grow in response to factors such as wind, light and plant architecture . Using these chemical messengers, they can react to the environment and assess the best growth pattern. [ 19 ]
A chemical message is any compound that serves to transmit a message, and may refer to: Hormone, long range chemical messenger; Neurotransmitter, communicates to adjacent cells; Neuropeptide, a protein sequence which acts as a hormone or neurotransmitter. The blood or other body fluids transport neuropeptides to non adjacent target cells, where ...
An antagonist is a chemical that acts within the body to reduce the physiological activity of another chemical substance (such as an opiate); especially one that opposes the action on the nervous system of a drug or a substance occurring naturally in the body by combining with and blocking its nervous receptor.
Autocrine signaling occurs when the chemical signal acts on the same cell that produced the signaling chemical. [1] Intracrine signaling occurs when the chemical signal produced by a cell acts on receptors located in the cytoplasm or nucleus of the same cell. [2] Juxtacrine signaling occurs between physically adjacent cells. [3]
A semiochemical, from the Greek σημεῖον (semeion), meaning "signal", is a chemical substance or mixture released by an organism that affects the behaviors of other individuals. [1] Semiochemical communication can be divided into two broad classes: communication between individuals of the same species (intraspecific) or communication ...
The human brain is one of the most complex structures nature has ever devised, and that means there’s a lot we still don’t know about the three pounds of neurons and fat that rests between our ...
Neurotransmission (Latin: transmissio "passage, crossing" from transmittere "send, let through") is the process by which signaling molecules called neurotransmitters are released by the axon terminal of a neuron (the presynaptic neuron), and bind to and react with the receptors on the dendrites of another neuron (the postsynaptic neuron) a ...