NU 545 Unit 1 Exam | Practice Exam
Questions and Answers (Verified)
Latest Updated 2026/2027 (Already
Graded A+)| Guaranteed Pass!!
Stress-age syndrome pathophysiology - CORRECTANSWER ↑ baseline cortisol, ↓ clearance →
prolonged glucocorticoid exposure. Altered catecholamine secretion and receptor sensitivity. ↓
innate/adaptive immunity, ↑ autoantibodies. ↑ risk of hypertension, insulin resistance,
atherosclerosis. Cortisol neurotoxicity → memory decline and neurodegeneration.
Stress-age syndrome clinical manifestations - CORRECTANSWER Endocrine/Metabolic:
hyperglycemia, insulin resistance, osteoporosis. Immune: higher infection risk, slower wound
healing, ↑ autoimmune activity. Cardiovascular: hypertension, atherosclerosis, ↑ MI/stroke
risk. Neurological: impaired memory, mood changes, dementia progression. General: fatigue,
frailty, ↓ resilience to illness/surgery.
Stress-age syndrome management - CORRECTANSWER Lifestyle: exercise, stress reduction
(mindfulness, CBT), sleep hygiene, social support. Nutrition: protein, vitamins (D, C, E), minerals
(Ca, Zn, Se). Medical: treat comorbidities (HTN, diabetes, osteoporosis, autoimmune disease).
Monitoring: screen for metabolic syndrome, CVD, cognitive decline.
HIV antibody appearance after blood product infection - CORRECTANSWER Antibodies to HIV
typically appear within 4-7 weeks after exposure. This period is called the seroconversion
window period — the time between infection and when antibodies become detectable.
, Osmolarity - CORRECTANSWER The concentration of osmoles (particles that contribute to
osmotic pressure) per liter of solution. Units: Osmoles/L. Depends on volume, which can change
with temperature and pressure.
Osmolality - CORRECTANSWER The concentration of osmoles per kilogram of solvent (usually
water). Units: Osmoles/kg. Independent of temperature and pressure, so it's a more precise
measure in physiology.
Key clinical point about osmolarity and osmolality - CORRECTANSWER In the body, differences
between osmolarity and osmolality are usually small, but osmolality is preferred in clinical
practice because it reflects water balance more accurately.
HIV seronegative period after sexual transmission - CORRECTANSWER This window period can
last 6-14 months in some cases, although most people seroconvert within 2-3 months.
Colonization definition - CORRECTANSWER Colonization is the presence and growth of
microorganisms on skin, mucous membranes, or other body surfaces without causing tissue
damage, invasion, or symptoms of infection.
Key points about colonization - CORRECTANSWER The host and the microorganism exist in a
balanced relationship. Colonization does not trigger an immune or inflammatory response like
infection does.
Opportunistic pathogens - CORRECTANSWER Microorganisms may become opportunistic
pathogens if host defenses are compromised.
Examples of colonization - CORRECTANSWER Staphylococcus aureus colonizing the nasal
passages. Escherichia coli colonizing the gut.
Questions and Answers (Verified)
Latest Updated 2026/2027 (Already
Graded A+)| Guaranteed Pass!!
Stress-age syndrome pathophysiology - CORRECTANSWER ↑ baseline cortisol, ↓ clearance →
prolonged glucocorticoid exposure. Altered catecholamine secretion and receptor sensitivity. ↓
innate/adaptive immunity, ↑ autoantibodies. ↑ risk of hypertension, insulin resistance,
atherosclerosis. Cortisol neurotoxicity → memory decline and neurodegeneration.
Stress-age syndrome clinical manifestations - CORRECTANSWER Endocrine/Metabolic:
hyperglycemia, insulin resistance, osteoporosis. Immune: higher infection risk, slower wound
healing, ↑ autoimmune activity. Cardiovascular: hypertension, atherosclerosis, ↑ MI/stroke
risk. Neurological: impaired memory, mood changes, dementia progression. General: fatigue,
frailty, ↓ resilience to illness/surgery.
Stress-age syndrome management - CORRECTANSWER Lifestyle: exercise, stress reduction
(mindfulness, CBT), sleep hygiene, social support. Nutrition: protein, vitamins (D, C, E), minerals
(Ca, Zn, Se). Medical: treat comorbidities (HTN, diabetes, osteoporosis, autoimmune disease).
Monitoring: screen for metabolic syndrome, CVD, cognitive decline.
HIV antibody appearance after blood product infection - CORRECTANSWER Antibodies to HIV
typically appear within 4-7 weeks after exposure. This period is called the seroconversion
window period — the time between infection and when antibodies become detectable.
, Osmolarity - CORRECTANSWER The concentration of osmoles (particles that contribute to
osmotic pressure) per liter of solution. Units: Osmoles/L. Depends on volume, which can change
with temperature and pressure.
Osmolality - CORRECTANSWER The concentration of osmoles per kilogram of solvent (usually
water). Units: Osmoles/kg. Independent of temperature and pressure, so it's a more precise
measure in physiology.
Key clinical point about osmolarity and osmolality - CORRECTANSWER In the body, differences
between osmolarity and osmolality are usually small, but osmolality is preferred in clinical
practice because it reflects water balance more accurately.
HIV seronegative period after sexual transmission - CORRECTANSWER This window period can
last 6-14 months in some cases, although most people seroconvert within 2-3 months.
Colonization definition - CORRECTANSWER Colonization is the presence and growth of
microorganisms on skin, mucous membranes, or other body surfaces without causing tissue
damage, invasion, or symptoms of infection.
Key points about colonization - CORRECTANSWER The host and the microorganism exist in a
balanced relationship. Colonization does not trigger an immune or inflammatory response like
infection does.
Opportunistic pathogens - CORRECTANSWER Microorganisms may become opportunistic
pathogens if host defenses are compromised.
Examples of colonization - CORRECTANSWER Staphylococcus aureus colonizing the nasal
passages. Escherichia coli colonizing the gut.
