ball-and-socket joint (bawl-and-sok'et joint) A bone with a spherical mass on one end joined with a bone possessing a complementary hollow depression. p. 276 baroreceptor (bar"o-re-sep'tor) Sensory receptor in the blood vessel wall stimulated by changes in pressure (pressoreceptor). p. 456 basal nuclei (bas'al nu'kle-i) Mass of gray matter located deep within a cerebral hemisphere of the brain. p. 418 basal metabolic rate (ba'sal met"ah-bo'lic rat) Rate at which metabolic reactions occur when the body is at rest. p. 746 base (bas) A substance that ionizes in water to release hydroxyl ions (OH-) or other ions that combine with hydrogen ions. p. 47 basement membrane (bas'ment mem'bran) A layer of nonliving material that anchors epithelial tissue to underlying connective tissue. p. 143 basophil (ba'so-fil) White blood cell containing cytoplasmic granules that stain with basophilic dye. p. 555 beta-oxidation (ba'tah-ok"si-da'shun)

Chemical process by which fatty acids are converted to molecules of acetyl coenzyme A. p.741

beta receptor (ba'tah re-sep'tor) Receptor on an effector cell membrane that combines mainly with epinephrine and only slightly with norepinephrine. p. 442 bicarbonate buffer system (bi-kar'bo-nat buf'er sis'tem) A mixture of carbonic acid and sodium bicarbonate that weakens a strong base and a strong acid, respectively; resists a change in pH. p. 868 bicarbonate ion (bi-kart>on-at i'on) HCO3-. p. 811

Shier-Butler-Lewis: I Back Matter I Glossary I I © The McGraw-Hill

Human Anatomy and Companies, 2001

Physiology, Ninth Edition bicuspid tooth (bi-kus'pid tooth) A premolar that is specialized for grinding hard particles of food. p. 693 bicuspid valve (bi-kus'pid valv) Heart valve located between the left atrium and the left ventricle; mitral valve. p. 585 bile (bll) Fluid secreted by the liver and stored in the gallbladder. p. 711 bilirubin (bil"I-roo'bm) A bile pigment produced from hemoglobin breakdown. p. 551

biliverdin (bil"i-ver'din) A bile pigment produced from hemoglobin breakdown. p. 550

biochemistry (bi"o-kem'is-tre) Branch of science dealing with the chemistry of living organisms. p. 39 biofeedback (bi"o-fed'bak) Procedure in which electronic equipment is used to help a person learn to consciously control certain visceral responses. p. 461 biotin (bi'o-tin) A water-soluble vitamin; a member of the vitamin B complex. p. 756 bipolar neuron (bi-po'lar nu'ron) A nerve cell whose cell body has only two processes, one an axon and the other a dendrite. p. 368 blastocyst (blas'to-sist) An early stage of prenatal development that consists of a hollow ball of cells. p. 942 blood (blud) Cells in a liquid matrix that circulate through the heart and vessels carrying oxygen and nutrients throughout the body. p. 158 B lymphocyte (B lim'fo-slt) Lymphocyte that reacts against foreign substances in the body by producing and secreting antibodies; B cell. p. 661 BMR Basal metabolic rate. p. 746 bond (bond) Connection between atoms in a compound. p. 41 bone (bon) Part of the skeleton composed of cells and inorganic, mineral matrix p. 158 brachial (bra'ke-al) Pertaining to the arm. p. 24

bradycardia (brad"e-kar'de-ah) An abnormally slow heart rate or pulse rate. p. 600

brain stem (bran stem) Portion of the brain that includes the midbrain, pons, and medulla oblongata. p. 412 brain wave (bran wav) Recording of fluctuating electrical activity in the brain. p. 427

Broca's area (bro'kahz a're-ah) Region of the frontal lobe that coordinates complex muscular actions of the mouth, tongue, and larynx, making speech possible. p. 415 bronchial tree (brong'ke-al tre) The bronchi and their branches that carry air from the trachea to the alveoli of the lungs. p. 786 bronchiole (brong'ke-ol) A small branch of a bronchus within the lung. p. 786 bronchus (brong'kus) A branch of the trachea that leads to a lung (pl., bronchi). p. 786 buccal (buk'al) Pertaining to the mouth and the inner lining of the cheeks. p. 24

buffer (buf'er) A substance that can react with a strong acid or base to form a weaker acid or base, and thus resist a change in pH. p. 868 bulbourethral gland (bul"bo-u-re'thral gland) Gland that secretes a viscous fluid into the male urethra at times of sexual excitement; Cowper's gland. p. 891 bulimia (bu-lim'e-ah) A disorder of binge eating followed by purging. p. 768 bulk element (bulk el'e-ment) Basic chemical substance needed in large quantity. p. 39 bursa (bur'sah) A saclike, fluid-filled structure, lined with synovial membrane, near a joint. p. 275 bursitis (bur-si'tis) Inflammation of a bursa. p. 290

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