Lecture Exam 3 (autonomic division) Flashcards
functions as a control system, below level of consciousness over the function of internal organs. regulates body temperature and coordinates cardiovascular, respiratory, digestive, excretory, and reproductive function. located in brain (myelencephalon)
autonomic nervous system
subdivisions of ANS
sympathetic division and parasympathetic division
resting conditions
parasympathetic division
kicks in during time of exertion, stress, or emergency. fight or flight. stimulates tissue metabolism, increases alertness, and prepares the body to deal with emergencies
sympathetic division
third division of ANS. extensive network of neurons and nerve networks located in the walls of the digestive tract of which has localized function for the intestines
enteric nervous system
when stimulated they release the neurotransmitters epinephrine and norepinephrine into an extensive network of capillaries
adrenal medullae
effects of sympathetic stimulation
increased alertness, feeling of energy and euphoria (disregard for danger and temporary insensitivity to painful stimuli), increased activity in the cardiovascular and respiratory centers of the pons and medulla oblongata, general elevation in muscle tone (shivers), and mobilization of energy reserves.
set of metabolic pathways that break down molecules into smaller units to release energy.
catabolism
rest and repose system. constriction of pupils, secretion by digestive glands, secretion of hormones, increased smooth muscle activity, stimulation and coordination of defecation, contraction of urinary bladder during urination, reduction in heart rate, sexual arousal. center on relaxation, food processing, and energy absorption
parasympathetic division
set of metabolic pathways that construct molecules from smaller units. require energy. powered by catabolism
anabolism
