Exit Ticket (Thursday)

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment

• is the maintenance of a relatively stable external environment

Which correctly identifies all steps involved in negative feedback?

• initiation event, stimulus, positive feedback, response, effector, control center, receptor

• termination event, stimulus, reply, effector, control center, and receptor

• initiation event, response, stimulus, effector, command center

• initiation event, stimulus, receptor, control center, effector and response

What type of feedback loop is shown?

• negative
• neutral 
• positive

Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

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. 

• Positive Feedback Response
• Negative Feedback Loop 

According to the feedback loop, what does high blood sugar promote?

• Insulin Release

• Glucagon Release

• Insulin Uptake

• Glycogen Uptake

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

• Positive Feedback Response
• Negative Feedback Loop