This study describes the effects of several fixatives and buffers on the morphology of mitochondria from resting and exhausted rats. Rats were run to exhaustion and adjacent portions from the left ventricle or from the soleus were treated with the following fixation procedures: (a) glutaraldehyde buffered with cacodylate, S-collidine, or phosphate…

Comparison of the aerobic metabolic requirements of normal walking with and without 1-, 2-, and 3-pound handweights among nine adult males indicated that walking while moving handweights through large ranges of motion provides a combined upper and lower body aerobic stimulus that is sufficient for endurance training for persons with poor to…

Three experiments indexed the effect of various concurrent tasks, while watching a traumatic film, on intrusive memory development. Hypotheses were based on the dual-representation theory of posttraumatic stress disorder (C. R. Brewin, T. Dalgleish, & S. Joseph, 1996). Nonclinical participants viewed a trauma film under various encoding conditions…

To adhere to the principle of "exercise specificity" exercise testing should be completed using the same physical activity that is performed during exercise training. The present study was designed to assess whether aerobic step exercisers have a greater maximal oxygen consumption (max VO sub 2) when tested using an activity specific, maximal step…

This article introduces the special issue of the journal on the topic of youth violence as adaptation to community violence. Contrary to the predominant perspective that youth violence is a sign of dysfunction or maladaptation, the articles collected here consider whether some youth violence may have positively adaptive consequences in the face of…

The roles of science in society and the nature of science are the focus of many science curricula. Current views about these two aspects of science have largely been informed by the history of scientific development. This article uses the outbreak of severe acute respiratory syndrome--a recent health scare--as a case study to explore the roles of…

Objective: The purpose of this study was to establish baseline values on physiological parameters for 7-11 graders (n = 146) in a rural area of Alabama and to examine whether differences existed among the adolescents in the county. Design: Descriptive. Setting: Many adolescents in the southern portion of the United States suffer disproportionately…

The aim of this study was to investigate the physiological responses of long-term hospitalized children when exposed to live music. Twenty-one paediatric patients at Great Ormond Street Children's Hospital, London, between 3 months and 14 years of age, took part in the study. They were all long-term patients with cardiac and/or respiratory…

Cellular respiration and metabolism are topics that are reportedly poorly understood by students and judged to be difficult by many teachers. Although these topics may not be required learning areas in some high school biology curricula, a grasp of fundamental concepts of cellular metabolic processes is advantageous for students undertaking (or…

One of the problems that we have found when teaching human physiology in a Spanish medical school is that the degree of understanding by the students of the integration between organs and systems is rather poor. We attempted to remedy this problem by using a case discussion method together with the Quantitative Circulatory Physiology (QCP)…

This study was carried out on fifteen dogs to determine the role of blood flow in limiting maximal metabolic rate. (JS)

Biorhythm comes from the Greek words for life and regulated beat. The science of biorhythm is concerned with the rhythmic cycles of physical, emotional, and intellectual life. These cycles have lengths of 23, 28, and 33 days respectively. During the first half of each cycle, energy is high. During the low period, second phase abilities, feelings,…