R

Rathke's pouch, 120 Reabsorption chloride, 320 description of, 220 sodium, 317-320, 338 water, 317 Receptive aphasia, 55 Receptors, see also Baroreceptors; Osmoreceptors adrenergic, 101-102 alpha, 102 beta, 102-103 cholinergic, 101 duodenal, 290 hormone binding to, 116 hydrophilic drug binding to, 11 muscarinic, 101, 107 neurotransmitter binding to, 42 nicotinic, 101 opioid, 83, 88 pain, 272 Reciprocal inhibition, 74-75 Rectum, 303 Referred pain, 85-86 Reflex characteristics of, 72 description of, 47-48 spinal, 72-75 withdrawal, 73-75 Reflex arc, 72-73

Relative refractory period, 28, 174 Renal blood flow afferent arteriole effects on, 330-331 autoregulation of, 329-330 description of, 316, 329 mean arterial pressure and, 330-331 Renal system function of, 2 kidneys, see Kidneys Renin, 134, 333-334 Repolarization, 25 Residual volume, 254-255 Respiratory distress syndrome, 248-249

Respiratory system blood-gas interface, 240-241, 258 breathing mechanics, 243-246 function of, 2 lungs airways of, 241-242 alveoli of description of, 240-241, 247 interdependence of, 250-251 bronchi of, 241 bronchioles of, 241-242 connective tissue in, 247 elastic behavior of, 246-250 elastic recoil of, 246 gas exchange in, 240 pleura of, 242 pulmonary compliance,

246-247 surfactant, 248-249 ventilation-perfusion matching, 261-263 Respiratory zone, 241 Resting membrane potential, 18-21, 169

Reticular formation, 58, 81 Rh factor, 230 Rh incompatibility, 230 Right atrium, 165 Right ventricle, 165 Rigor mortis, 145 Rubrospinal tract, 69

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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