HUMAN BIOLOGY

glossary  G-9 extraembryonic membranes Membranes that form along with a developing embryo, including the yolk sac, amnion, all ...

G-10 glossary  gene pool Sum total of all genotypes in a population. More accurately, allele pool. gene therapy Generally, the ...

glossary  G -11 hemostasis (hee-mow-stay-sis) [Gk. haima, blood, and stasis, standing] Stopping of blood loss from a damaged b ...

G-12 glossary  immunity The body’s overall ability to resist and combat any substance foreign to itself. immunization Various ...

glossary  G -13 kilocalorie One thousand calories of heat energy, or the amount of energy needed to raise the temperature of 1 ...

G-14 glossary  macroevolution The large-scale patterns, trends, and rates of change among groups of species. macrophage A phag ...

glossary  G -15 microscopy The use of a microscope to view objects, includ- ing cells, that are not visible to the naked eye. ...

G-16 glossary  nerve tract A bundle of myelinated axons of interneurons inside the spinal cord and brain. nervous system Syste ...

glossary  G -17 osmoreceptor Sensory receptor that detects changes in water volume (solute concentration) in the fluid bathing ...

G-18 glossary  peroxisome Enzyme-filled vesicle in which fatty acids and amino acids are digested first into hydrogen peroxide ...

glossary  G -19 positive feedback mechanism Homeostatic mechanism by which a chain of events is set in motion that intensifies ...

G-20 glossary  reflex [L. reflectere, to bend back] A simple, stereotyped movement in response to a stimulus. Sensory neurons ...

glossary  G-21 segmentation In the small intestine, an oscillating move- ment produced by rings of muscle that moves digested ...

G-22 glossary  genetic differences prevent them from interbreeding success- fully under natural conditions. species (spee-ceez ...

glossary  G-23 systole Contraction phase of the cardiac cycle. target cell Any cell that has receptors for a specific signalin ...

G-24 glossary  tubular secretion The step of urine formation in which unwanted substances in peritubular capillaries are moved ...

glossary  G-25 vocal cords A pair of elastic ligaments on either side of the larynx wall. Air forced between them causes the c ...

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Note: Figures and tables are indicated by an f or t following the page number. n Application Index Entry n (^) Disorder Index En ...

I-2 Index  Adrenocorticotropic hormone (ACTH), 287f, 290t, 291, 291f, 296, 297f Adulthood, as development stage, 347, 347t AED ...