CNA Basic Human Anatomy and Age-Related Changes 2 — Questions and Answers
Question 1: An 82-year-old resident with no history of diabetes complains that their food tastes bland and has started adding excessive salt. This age-related change, which can lead to poor nutrition, is primarily due to a decline in which sense?
- Gustatory (taste) function alone
- Olfactory (smell) function (Correct answer)
- Trigeminal nerve sensitivity
- Salivary gland production only
Correct answer: Olfactory (smell) function
While the sense of taste (gustatory function) does decline with age, the most significant reason older adults perceive food as bland is due to a diminished sense of smell (olfaction). The two senses are closely linked, and much of what we perceive as flavor is actually aroma. A decline in smell is more pronounced with aging than the decline in taste.
Question 2: A CNA is assisting a 78-year-old male resident who has been waking up 3-4 times per night to urinate (nocturia). Which age-related physiological change is the MOST likely contributor to this resident's condition, independent of prostate issues?
- Increased production of antidiuretic hormone (ADH) at night
- A significant increase in the bladder's maximum holding capacity
- Decreased nocturnal urine production and increased bladder elasticity
- Reduced bladder capacity and changes in circadian rhythms affecting urine production (Correct answer)
Correct answer: Reduced bladder capacity and changes in circadian rhythms affecting urine production
As people age, the bladder's maximum capacity to hold urine decreases, and its walls become less elastic. Additionally, the normal circadian rhythm that reduces urine production during the night can become less pronounced, leading to nocturnal polyuria (increased urine output at night). This combination forces more frequent nighttime urination.
Question 3: Which of the following is considered a NORMAL, non-pathological cognitive change associated with the aging nervous system?
- Frequently getting lost in familiar neighborhoods
- Taking longer to recall the name of a new acquaintance (Correct answer)
- Rapid mood swings and personality changes
- Forgetting the purpose of common objects like a key or a phone
Correct answer: Taking longer to recall the name of a new acquaintance
Normal aging can involve a subtle decline in the speed of processing information and word-finding ability. Taking a bit longer to recall a name is a common, benign example of this. In contrast, getting lost in familiar places, significant personality changes, and forgetting the use of everyday items are potential signs of a more serious condition like dementia and are not part of normal aging.
Question 4: A frail 88-year-old resident is being cared for during a heatwave. The CNA should be especially vigilant for signs of hyperthermia because, compared to a younger person, this resident's body has a reduced ability to cool itself. This is primarily due to:
- An overactive sweat response and rapid skin vasodilation
- Increased subcutaneous fat layer providing excess insulation
- Attenuated sweat response and less efficient skin blood flow (Correct answer)
- A lower core body temperature threshold for initiating cooling mechanisms
Correct answer: Attenuated sweat response and less efficient skin blood flow
With advanced age, the body's ability to thermoregulate is impaired. Key changes include a reduced or delayed sweat response and less efficient cutaneous vasodilation (widening of blood vessels in the skin). Both of these mechanisms are crucial for dissipating heat, and their decline makes older adults more susceptible to overheating (hyperthermia).
Question 5: A CNA observes a 90-year-old resident, who is otherwise cognitively intact, becoming increasingly hesitant and shuffling when walking on uneven surfaces. This difficulty is most directly linked to an age-related decline in:
- Adipose tissue in the soles of the feet
- The number of fast-twitch muscle fibers
- Proprioception, the sense of body position (Correct answer)
- The production of synovial fluid in the knees
Correct answer: Proprioception, the sense of body position
Proprioception is the body's ability to sense its own position, movement, and balance in space. This sense declines with age due to changes in sensory receptors in muscles and joints and slower processing by the central nervous system. This decline directly impacts balance and coordination, increasing fall risk, especially on uneven ground.
Question 6: A resident with well-managed hypertension, but no diagnosis of diabetes, is noted to have slowly increasing fasting blood glucose levels over several years. This trend can be a normal part of aging due to which endocrine system change?
- Increased sensitivity of cells to insulin
- A significant increase in pancreatic beta-cell mass
- Decreased insulin resistance and improved glucose uptake
- A gradual decrease in insulin secretion and increased insulin resistance (Correct answer)
Correct answer: A gradual decrease in insulin secretion and increased insulin resistance
Glucose tolerance tends to decline with age. This is often due to a combination of factors, including a gradual decrease in the pancreas's ability to secrete insulin and an increase in insulin resistance, where the body's cells don't respond as effectively to insulin. This can lead to a slow rise in blood glucose levels even in non-diabetic individuals.
CNA Basic Human Anatomy and Age-Related Changes 2
An 82-year-old resident with no history of diabetes complains that their food tastes bland and has started adding excessive salt.
This age-related change, which can lead to poor nutrition, is primarily due to a decline in which sense?