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fandomhigh2005-10-25 09:28 am
equalsmcsquared.livejournal.com) wrote in fandomhigh2005-10-25 09:28 am
Entry tags:
Biology
Greetings, everyone. Please stack your reports next to the roll sheet. Help yourselves to the snack, God knows I won't eat them all.
Today, we will begin discussing human endocrinology.
The essence of multicellularity is the coordinated interaction of the various kinds of cells that make up the body. Cells communicate with each other by chemical signals.
Three kinds of chemical signaling can be distinguished:
autocrine - the cell signals itself through a chemical that it synthesizes and then responds to. Autocrine signaling can occur solely within the cytoplasm of the cell or by a secreted chemical interacting with receptors on the surface of the same cell
paracrine - chemical signals that diffuse into the area and interact with receptors on nearby cells.
Examples are:
The release of cytokines that cause an inflammatory response in the area.
The release of neurotransmitters at synapses in the nervous system.
endocrine - the chemicals are secreted into the blood and carried by blood and tissue fluids to the cells they act upon.
Today, we will begin discussing human endocrinology.
The essence of multicellularity is the coordinated interaction of the various kinds of cells that make up the body. Cells communicate with each other by chemical signals.
Three kinds of chemical signaling can be distinguished:
autocrine - the cell signals itself through a chemical that it synthesizes and then responds to. Autocrine signaling can occur solely within the cytoplasm of the cell or by a secreted chemical interacting with receptors on the surface of the same cell
paracrine - chemical signals that diffuse into the area and interact with receptors on nearby cells.
Examples are:
The release of cytokines that cause an inflammatory response in the area.
The release of neurotransmitters at synapses in the nervous system.
endocrine - the chemicals are secreted into the blood and carried by blood and tissue fluids to the cells they act upon.
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Jonathan extends a hand, "I'm Jonathan Crane, it's a pleasure to meet you."
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Hey. You're that guy who was mutterin' about druggin' people in the common room coupla weeks back. *glare* You have abandoned that plan, right?
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