Homeostasis Flashcard

Front

Homeostasis

Back

Homeostasis means that our body maintains a relatively constant internal environment that often incorporates a form of feedback regulation.

Front

Which of the following variables do our bodies regulate?

• Glucose concentration in blood
• Body temperature
• Blood volume (how much blood is in our body at one time)
• All of the above

Back

All of the above

Front

What type of feedback loop is shown? Options: Positive, Ngeative, Neutral

Back

Ngeative

Front

Which of the following is an example of positive feedback to indirectly maintain homeostasis?

Back

The chemical reactions involved in blood clotting

Front

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels. This is an example of...

Back

Negative Feedback

Front

True or False: Negative feedback loops are bad for the human body.

Back

False

Front

When you get cut, your skin releases hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop the bleeding. The hormone signals continue until the cut is closed. This is an example of....

Back

Positive feedback mechanism

Front

Most control mechanisms in the human body are ______________________ mechanisms.

Back

negative feedback

Front

Positive feedback is when the change caused by a stimulus is...

Back

increased

Front

Childbirth is an example of _______________ feedback.

Back

positive