Exam 1 - Module 2 - Study Guide Flashcards
What are the 3 components of physiologic stress
1 - enlargement of the adrenal gland
2 - decreased lymphocyte levels in the blood from damage to lymphatic structure of the immune system
3 - development of bleeding ulcers in the stomach and duodenal lining
GAS (general adaptation syndrome)
when physiologic stress impairs the ability of the organism to resist future stressors and represents the hallmark pattern of nonspecific stress response
3 stages of GAS
1 - alarm stage - the secretion of hormones and catecholamines to prepare for emergency reaction
2 - resistance or adaptation stage - mobilization of the body’s resource to handle sustained challenge
3 - exhaustion stage (allostatic overload) - over activation of the adaptive systems. leads to stress-related disorders
sympathetic nervous system SNS
fight or flight
what does the SNS release
epinephrine , norepinephrine, and cortisol
these hormones rapidly mobilize the resources necessary to prepare the brain for fight of flight
allostatic overload
exhaustion - occurs when the protective physiologic regulatory systems are taxed by chronic, persistent exposure to threat and no longer able to adapt to the current new stressors
explain the hypothalamic-pitutary-adrenal (HPA) axis
Stress activates the hypothalamus to secrete corticotropin-releasing hormone (CRH), which binds to receptors on anterior pituitary cells, which, in turn, produce adrenocorticotropic hormone (ACTH).
ACTH is then released into blood and transported to the adrenal glands located on the top of the kidneys.
After binding to receptors on the cortex of the adrenal glands, the glucocorticoid (GC) hormone, primarily cortisol (cortisol is known outside the body as hydrocortisone), is released and reaches all tissues, including the brain.
what are some of the function that cortisol effects
1 - carbohydrate and lipid metabolism - body holds onto fat
2 - protein metabolism
3 - anti-inflammatory effects
4 - lipid metabolism
5 - immune effects
6 - digestive function - promotes gastric secretion
7 - urinary function - excess secretion of calcium
what are some disorders linked to high cortisol
- obesity
- sleep deprivation
- lipid abnormalities
- hypertension
- diabetes
- atherosclerosis
- loss of bone density
What effect to catecholamines have on the body
- brain - increase blood flow; increased glucose metabolism (do NOT cross the blood-brain barrier)
- cardiovascular - increased hear rate and force, vasoconstriction
- pulmonary - bronchodilation
- skeletal muscle - increased glycogenolysis, increased contraction
- liver - increased glucose production
- skin - decreased blood flow
parasympathetic nervous system
rest and digest, slows the heart rate
what does the renal system consist of
the kidneys
what is the primary function of the kidneys
maintain a stable internal environment for optimal cell and tissue metabolism.
where are the kidneys located
posterior region of the abdominal cavity behind the peritoneum.
what is the outer layer of the kidney
cortex
what is the inner part of the kidney and what does it consist of
medulla
consists of pryamids
what part of the kidneys receive urine form the collecting ducts
minor and major calyces
how many lobes are in each kidney
14-18
what is the kidney lobe
structural unit of the kidney
what is the functional unit of the kidney
nephron
what is contraction of the bladder called
micturition (urination)
what are the stymptoms assocaited wiht Overactive Bladder Syndrome (OAB)
- involuntary contractions of the detrusor muscles resulting in urge incontinence
- more common in females 65 and older
which medication put you at risk of overactive bladder syndrome (OAB)
diuretics
antidepressants
alpha- agonists
beta-antagonists
sedatives
anticholinergics
analgesics
What is neurogenic bladder
term for bladder dysfunction caused by neurologic disorder.
what is usually prescribed for a neurogenic bladder
bethanechol chloride - it is a cholinergic agent that stimulates the bladder to empty.