Registered Practical Nurse (RPN) Practice Test

What significant biological change occurs in later adulthood?

1. Increase in muscle mass

2. Blood flow in the liver decreases

3. Enhanced respiratory function

4. Better circulation in extremities

The correct answer is: Blood flow in the liver decreases

In later adulthood, one significant biological change is a decrease in blood flow in the liver. This change is part of the body's natural aging process, where various physiological functions may become less efficient. As individuals age, the liver often experiences a reduction in size and blood flow, which can impact its ability to metabolize substances, process medications, and detoxify the body. This decrease in hepatic blood flow can lead to altered pharmacokinetics for certain medications, meaning that drugs may stay in the system longer or be less effective. Understanding this change is critical for healthcare providers, including Registered Practical Nurses, as it informs how they manage medication regimens and assess liver function in older adults. Recognizing this biological shift helps ensure safe and effective care for aging patients.