Basic Human Anatomy and Age-Related Changes Flashcards

An elderly patient's skin appears thin, fragile, and nearly translucent with prominent veins. Which specific age-related change to the dermis MOST directly explains this appearance?

Answer: Loss of dermal collagen and elastin reducing skin thickness and turgor

With aging, the dermis loses collagen fibers and elastin, causing the skin to thin, lose elasticity, and become translucent. This structural protein loss — not melanocyte changes or fat hypertrophy — is the primary reason elderly skin appears fragile and reveals underlying vasculature.

A 78-year-old resident has difficulty swallowing solid foods but tolerates liquids well. Which age-related anatomical change to the esophagus BEST explains this specific presentation?

Answer: Decreased peristaltic wave amplitude and coordination (presbyesophagus)

Presbyesophagus refers to age-related deterioration of esophageal motility — reduced amplitude and coordination of peristaltic contractions. This impairs propulsion of solids more than liquids because solids require stronger peristaltic force to advance through the esophagus. The esophagus has no cartilage, and the cricopharyngeal muscle would affect all swallowing if hypertrophied.

When positioning an elderly resident for a procedure, the CNA notices the resident cannot fully extend the neck. This limitation is MOST likely due to which age-related skeletal change?

Answer: Osteoporotic compression fractures of the thoracic vertebrae causing kyphosis and compensatory cervical changes

Age-related osteoporosis commonly leads to compression fractures of thoracic vertebrae, producing kyphosis (forward curvature). The cervical spine compensates by extending, which over time reduces available range of motion. Cervical discs actually lose hydration (desiccate) with age — not gain it — and tracheal rings do not restrict movement.

An 82-year-old male resident is noted to have a decreased glomerular filtration rate (GFR). As a CNA administering oral medications, which implication of this change is MOST relevant to your observations and reporting?

Answer: Medications may accumulate to toxic levels due to reduced renal clearance

Reduced GFR means the kidneys clear medications more slowly. Drugs that are renally excreted can accumulate to toxic levels in elderly patients, causing adverse effects. CNAs should report changes in behavior, alertness, or new symptoms that could indicate drug toxicity. Reduced GFR typically decreases urine output, not increases it.

During morning care, a CNA notices an elderly resident's joints are stiffest and most painful in the morning but improve after about 30 minutes of activity. This pattern MOST specifically reflects which structural change in synovial joints?

Answer: Reduced viscosity and volume of synovial fluid combined with cartilage thinning

With aging, synovial fluid production decreases and its viscosity (lubricating quality) diminishes. Combined with progressive cartilage thinning, joint surfaces have less cushioning and lubrication after periods of inactivity. Movement redistributes remaining fluid and warms the joint, temporarily improving function — explaining the classic morning stiffness pattern of osteoarthritis. Inflammatory morning stiffness lasting >1 hour is more characteristic of rheumatoid arthritis.

An elderly resident has been diagnosed with presbycusis. A CNA who understands the anatomical basis of this condition would use which MOST effective communication technique?

Answer: Speaking in a lower pitch, facing the resident directly, and reducing background noise

Presbycusis is sensorineural hearing loss caused by age-related degeneration of cochlear hair cells — specifically the high-frequency receptor cells at the basal turn of the cochlea are lost first. This makes high-pitched sounds harder to hear, while lower frequencies are preserved longer. Speaking louder without lowering pitch is ineffective and distorts sound. Facing the resident allows lip-reading, and minimizing background noise reduces competing stimuli for the impaired auditory system.