Ch. 2 Flashcards
(1) Discussion (2) Ch. 2 LS (3) Quiz (4) What Stresses You Out?
Stressor
Any physical or psychological event or condition that produces physical and psychological reactions.
Stress Response
The physical and emotional reactions to a stressor.
Stress
The general physical and emotional state that the stressor produces.
What are the two systems in the human body responsible for the physical responses to stressors?
The nervous system and the endocrine system.
Nervous System
(1) The brain, spinal cord, and nerves.
(2) Handles short-term stress.
Autonomic Nervous System
The part of the nervous system that controls certain basic body processes; consists of the sympathetic and parasympathetic divisions.
Parasympathetic Nervous System
The part of the autonomic nervous system that moderates the excitatory effect of the sympathetic division, slowing metabolism and restoring energy supplies.
Sympathetic Nervous System
Division of the autonomic nervous system that reacts to danger or other challenges by accelerating bodily processes.
What neurotransmitter is used by the sympathetic nervous system to affect nearly every organ, sweat gland, blood vessel, and muscle to enable your body to handle an emergency?
Norepinephrine (or noradrenaline)
Endocrine System
(1) The system of glands, tissues, and cells that secrete hormones into the bloodstream to influence metabolism and other body processes.
(2) Deals with both short-term (acute) and long-term (chronic) stress.
Hormone
A chemical messenger produced in the body and transported in the bloodstream to target cells or organs for specific regulation of their activities.
Adrenal Glands
(1) Located near the top of the kidneys.
(2) Produces the hormones cortisol and epinephrine (a.k.a. adrenaline).
(3) Activated by the nervous system and endocrine system.
Endorphins
Brain secretions that have pain-inhibiting effects.
Physiological Mechanisms of Fight, Flight, or Freeze
(1) Pupils dilate to admit extra light for more sensitive vision
(2) Mucous membranes of nose and throat shrink, while muscles force a wider opening of air passages to allow easier airflow.
(3) Secretion of saliva and mucus decreases; digestive activities have a low priority in emergencies
(4) Air passages dilate to allow more air into the lungs.
(5) Perspiration increases, especially in armpits, groin, hands, and feet, to flush out waste and cool the overheating body by evaporation.
(6) Liver releases sugar into the bloodstream to provide energy for the muscles and brain.
(7) Muscles of intestines stop contracting because digestion has halted.
(8) Bladder relaxes. Emptying of bladder contents releases excess weight, making it easier to flee.
(9) Blood vessels in skin and internal organs contract; those in skeletal muscles dilate. This increases blood pressure and delivery of blood to where it is needed most.
(10) Voluntary (skeletal) muscles contract throughout the body, readying them for action.
(11) Fat is removed from storage and broken down to supply extra energy.
(12) Pancreas decreases secretions because digestion has halted.
(13) Endorphins are released to block any distracting pain.
(14) Hearing becomes more acute.
(15) Heart accelerates rate of beating. Strength of contraction increases to allow more blood flow where it is needed.
(16) Spleen releases more red blood cells to meet an increased demand for oxygen and to replace any blood lost from injuries.
(17) Adrenal glands stimulate secretion of epinephrine, increasing blood sugar, blood pressure, and heart rate; also spur increase in amount of fat in blood. These changes provide an energy boost.
Fight-or-Flight Reaction
A defense reaction that prepares a person for conflict or escape by triggering hormonal, cardiovascular, metabolic, and other changes.
True or False:
The same basic set of physiological reactions occur in response to any type of stressor - positive or negative, physiological or psychological.
True
Homeostasis
A state of stability and consistency in an individual’s physiological functioning.
Two cognitive factors that can decrease the magnitude of the stress response are:
(1) Successful Prediction
(2) The Perception of Control
Cognitive Appraisal
The interaction with a potential stressor in which one thinks through the consequences of certain thoughts or behaviors, the processing of information.
Important factors to consider when evaluating how an individual may respond to stress include the following:
(1) Personality
(2) Cultural Background
(3) Gender
(4) Individual Experiences
Personality
The sum of behavioral, cognitive, and emotional tendencies.
Two Types of Motivation
(1) Stressed Power Motivation
(2) Unstressed Affiliation Motivation
Stressed Power Motivation
Associated with people who are aggressive and argumentative and who need to have power over others.
Unstressed Affiliation Motivation
Form of motivation in which one is drawn to others and wants to be liked as friends.