By Lauralee Sherwood
Basics OF body structure, 3rd version, relies on Lauralee Sherwood's most sensible promoting 5th version of HUMAN body structure: FROM CELLS TO platforms. whereas either texts disguise an analogous key themes in a present, attractive, and clinically correct demeanour, basics OF body structure is briefer, decrease in point, and calls for much less of a history in chemistry, physics, and math than its sister textual content. crucial content material is prepared round the significant subject matter of homeostasis, as tested by way of the system-specific homeostatic version that opens every one bankruptcy, in addition to the "Focus on Homeostasis" that completes every one bankruptcy. New to this variation are process-oriented figures, created to help state-of-the-art visible beginners. those figures comprise step by step descriptions summarizing and integrating quite a few features of crucial thoughts. one other noteworthy addition is the comparative and early advent of "Principles of Neural and Hormonal Communication"-a NEW bankruptcy four. This variation additionally showcases an emphasis on real-life stories, utilizing analogies in addition to new "Clinical word" icons, which flag clinically appropriate fabric. The textual content can also be supported through PhysioEdge 2-arguably the simplest pupil CD-ROM at the market-which ties strategies and paintings including narration and animation. This loose CD-ROM has been revised to incorporate new media routines and tutorials, and is built-in with this 3rd variation to inspire scholars make optimum use of the on hand media. teachers are inclined to locate fundamental our Multimedia supervisor with teacher Resources-a CD containing ALL line paintings from the textual content, over forty animations, digital types of teacher fabrics, and Microsoft PowerPoint lectures.
Read or Download Fundamentals of Physiology: A Human Perspective (with CD-ROM and InfoTrac) (Available Titles CengageNOW) PDF
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Additional resources for Fundamentals of Physiology: A Human Perspective (with CD-ROM and InfoTrac) (Available Titles CengageNOW)
Cells are remarkably similar in the ways they carry out these basic functions. Thus all cells share many common characteristics. SPECIALIZED CELL FUNCTIONS In multicellular organisms, each cell also performs a specialized function, which is usually a modiﬁcation or elaboration of a basic cell function. For example, by taking special advantage of their protein-synthesizing ability, the gland cells of the digestive system secrete digestive enzymes that break down ingested food; these enzymes are all proteins.
As a result, the activating mechanism in the thermostat and the furnace are switched off. Thus the heat from the furnace counteracts or is “negative” to the original fall in temperature. If the heat-generating pathway were not shut off once the target temperature was reached, heat production would continue and the room would get hotter and hotter. Overshooting beyond the set point does not occur, because the heat “feeds back” to shut off the thermostat that triggered its output. Thus a negative-feedback control system detects a change in a controlled variable away from the ideal value, initiates mechanisms to correct the situation, then shuts itself off.
The extracellular ﬂuid is the internal environment of the body. It is the ﬂuid environment in which the cells live. Note that the internal environment is outside the cells but inside the body. By contrast, the intracellular ﬂuid is inside the cells and the external environment is outside the body. You live in the external environment; your cells live within the body’s internal environment. The extracellular ﬂuid (internal environment) is made up of two components: the plasma, the ﬂuid portion of the blood; and the interstitial ﬂuid, which surrounds and bathes the cells (inter means “between”; stitial means “that which stands”) (● Figure 1-4).