NU 545 Unit 2 Study Guide

Review the anatomy of the brain. (pg. 451)

Which portion is responsible for keeping you awake? (pg. 453) The epithalamus, pineal gland, functions much like the limbic system by influencing the secretion of melatonin associated with circadian rhythms.

Controlling thought? (pg. 452) They parietal lobe is involved in sensory association (storage, analysis, and interpretation of stimuli).

Emotions and behavior? (pg. 453) The hypothalamus is responsible for 2 major functions (1.) maintenance of a constant internal environment (2.) implementation of behavioral patterns. Integrative centers control ANS function, regulation of body temperature, endocrine function, and regulationof emotional …show more content…

Increased respirations warmed air is exhaled into the environment. Hyperventilation is associated with hyperthermia. 8. Voluntary measures people stretch out and increase the body surface area available for heat loss. People also slow down to decrease skeletal muscle work. They also wear light, loose garments to promote convection, conduction, and evaporation. 9. Adaptation to warmer climates Within several days of moving from a cooler to a warmer climate, the individual experiences an earlier onset of sweating, increased volume of sweat, and decreased sodium content. Heart rate is decreased and stroke volume increases so that cardiac output remains the same. Extracellular fluid volume and plasma volume increases. All of these things result in improved warm weather functioning.

What is heat exhaustion? (pg. 500) Heat exhaustion is a result of prolonged high core or environmental temperatures, which cause profound vasodilation and profuse sweating. Over a prolonged period, dehydration, decreased plasma volumes, hypotension, decreased cardiac output, and tachycardia can occur. The individual will feel weak, dizzy, nauseated, and faint. Lying flat redistributes vascular volume. The individual should be encouraged to drink warm fluids to replace fluid lost through sweating.

What is heat stroke? (pg. 500) Heat stroke is the potentially lethal result of a breakdown in control of an overstressed thermoregulatory center. The brain