Question

question ①
many changes occur to tissue structure as a result of aging. which of the following changes are true?
select all that apply
□ connective tissue production increases, causing stiffness
□ cardiac muscle cells and neurons are lost and not replaced
□ bone strength decreases
□ epithelial tissues get thinner

Explanation:

1. Connective tissue production increases, causing stiffness: With aging, connective tissues like collagen may have altered production (often cross - linking increases rather than just production, but the result is stiffness), so this is a true change.
2. Cardiac muscle cells and neurons are lost and not replaced: Cardiac muscle cells and most neurons have limited or no regenerative capacity, and their numbers decrease with aging, so this is true.
3. Bone strength decreases: Osteoporosis - related changes and decreased bone density with aging lead to reduced bone strength, so this is true.
4. Epithelial tissues get thinner: Epithelial tissues, like skin epithelium, do thin with aging due to reduced cell turnover, so this is true.

Answer:

• Connective tissue production increases, causing stiffness
• Cardiac muscle cells and neurons are lost and not replaced
• Bone strength decreases
• Epithelial tissues get thinner