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Q1. Which is an example of negative feedback?
a. Oxytocin release during childbirth
b. Blood clotting after injury
c. Shivering when body temperature drops
d. Uterine contractions
Answer: c. Shivering when body temperature drops
Q3. Which process is an example of positive feedback?
a. Blood sugar regulation
b. Sweating during exercise
c. Lactation after suckling
d. Blood pressure control
Answer: c. Lactation after suckling
Q4. Which best describes homeostasis?
a. A system in constant change
b. A stable internal environment maintained by regulation
c. The inability to adapt
d. Balance without energy use
Answer: b. A stable internal environment maintained by regulation
Q5. Which feedback loop is disrupted in uncontrolled hemorrhage leading to
shock?
a. Positive feedback
,b. Negative feedback
c. Homeostasis
d. Thermoregulation
Answer: a. Positive feedback
Q6. A client with hyperthermia is sweating profusely. This is an example of:
a. Negative feedback
b. Positive feedback
c. Feed-forward regulation
d. Homeostatic failure
Answer: a. Negative feedback
Q7. Which feedback system is responsible for oxytocin release during labor?
a. Positive feedback
b. Negative feedback
c. Reflex inhibition
d. Hormonal suppression
Answer: a. Positive feedback
Q8. In negative feedback, when blood pressure rises, what happens?
a. Heart rate increases
b. Vasodilation occurs
c. More renin is released
d. Sympathetic activity increases
Answer: b. Vasodilation occurs
Q9. Failure of which feedback system contributes to diabetic ketoacidosis?
a. Positive feedback in insulin secretion
b. Negative feedback in glucose regulation
c. Feed-forward in stress response
d. Positive feedback in cortisol release
Answer: b. Negative feedback in glucose regulation
Q10. Which is the end result of positive feedback loops if uncorrected?
a. Stability
,b. Return to homeostasis
c. Loss of steady state and instability
d. Decreased sensitivity to stimuli
Answer: c. Loss of steady state and instability
Section 2: Aging Changes (10 Questions)
Q11. Which organ shrinks with age?
a. Prostate
b. Gums
c. Heart
d. Lungs
Answer: b. Gums
Q12. Which is true about aging and temperature regulation?
a. Elderly have more sweat glands
b. Elderly have impaired heat sensation
c. Elderly regulate temperature faster than young adults
d. Elderly produce more body heat
Answer: b. Elderly have impaired heat sensation
Q13. A nurse knows that elderly patients are at higher risk of dehydration
because:
a. They sweat more
b. They have increased thirst perception
c. They have decreased thirst perception
d. They produce excess ADH
Answer: c. They have decreased thirst perception
Q14. Which is a normal hematologic change in aging women?
a. Increased hemoglobin
b. Decreased hemoglobin
c. Increased creatinine clearance
, d. Increased red blood cell count
Answer: b. Decreased hemoglobin
Q15. Which body system shows reduced elasticity with aging?
a. Musculoskeletal
b. Cardiovascular
c. Respiratory
d. All of the above
Answer: d. All of the above
Q16. A 78-year-old client is at higher risk for falls due to:
a. Increased bone density
b. Faster reflexes
c. Loss of proprioception and muscle mass
d. Higher muscle endurance
Answer: c. Loss of proprioception and muscle mass
Q17. Which endocrine change is common in aging?
a. Increased thyroid hormone
b. Increased insulin sensitivity
c. Decreased glucose tolerance
d. Increased cortisol clearance
Answer: c. Decreased glucose tolerance
Q18. Why are elderly patients more prone to constipation?
a. Increased GI motility
b. Reduced GI motility
c. Hypersecretion of gastric acid
d. Increased water absorption
Answer: b. Reduced GI motility
Q19. Which renal change is expected with aging?
a. Increased GFR
b. Decreased GFR
c. Increased urine concentration ability