Biology Flashcard on Homeostasis and Feedback Mechanisms

Front

When a person does strenuous exercise, small blood vessels (capillaries) near the surface of the skin increase in diameter. This change allows the body to be cooled. These statements best illustrate

Back

homeostasis

Front

Which situation is not an example of the maintenance of a dynamic equilibrium in an organism? Guard cells contribute to the regulation of water content in a geranium plant. The release of insulin lowers the blood sugar level in a human after eating a big meal. A runner perspires while running a race on a hot summer day.

Back

Water passes into an animal cell causing it to swell.

Front

Some people with spinal cord injuries do not sweat below the area of the injury. Without the ability to sweat, the human body temperature begins to rise. Which statement would best describe this situation?

Back

Dynamic equilibrium is disrupted.

Front

Activities in the human body are represented in the diagram. Which title would be appropriate for the diagram?

Back

Feedback Mechanisms Help to Maintain Homeostasis

Front

Sweating is a process that helps cool the body during strenuous exercise. This is an example of

Back

a feedback mechanism

Front

The diagram below represents an activity that occurs in the human body. This diagram best illustrates

Back

maintenance of homeostasis

Front

Regulation of internal body temperature in bumblebees during cold weather is an example of

Back

homeostasis

Front

A person usually experiences small variations in body temperature over a 24-hour period. These variations in temperature are an example of

Back

dynamic equilibrium

Front

An individual walks out of his air-conditioned (75°F) home into the hot outside environment (85°F). His ability to adjust to this changing environment involves a mechanism similar to

Back

the regulation of water loss by guard cells in plant leaves

Front

If body temperature is too high, some blood vessels increase in size and sweat glands will excrete sweat, resulting in a lower body temperature. These changes are an example of

Back

feedback mechanisms