Homeostasis and Feedback Mechanisms Quiz

What is homeostasis?

• The process by which a living organism maintains a stable internal environment despite changes in external conditions.

• The process by which a living organism changes its internal environment to match external conditions.

• The ability of an organism to change its shape in response to the environment.

• The process by which an organism increases its size.

Which of the following is negative feedback in homeostasis?

• When your body counteracts/resverses the change to bring your body back to normal

• Whe your body amplifies the change to bring your body back to normal

When your blood sugar is too high, your body releases insulin to bring it back down to normal. This is an example of:

• Positive Feedback

• Negative Feedback

When your blood sugar is too low, your body releases glucagon to raise your blood sugar levels back to normal. This is an example of

• Positive Feedback

• Negative Feedback

When you give birth, the release of oxytocin stimulates contractions which tells your body to release more oxytocin. This is an example of:

• Positive Feedback

• Negative Feedback

How does the body respond to a decrease in body temperature?

• By sweating

• By decreasing metabolic rate

• By shivering

• By vasodilation of the skin blood vessels

How does your body react to an increase in body temperature?

• Shiver

• Vasoconstrict your skin blood vessels

• Sweating

When you are sick with an infection, why does your body have a fever?

• To kill the bacteria

• The bacteria make your temperature go up

What does NOT happen to your body during an infection?

• Bacteria enters your body

• Symptoms

• Bacteria grow and reproduce

• Bacteria raise your body temperature to the temperature they prefer

T/F: Your normal body temperature maintains 98.6 all day long and does not fluctuate unless you are sick.

• True

• False