A+P Pop Quiz #1

Homeostasis

• allows for a wildly fluctuating internal environment

• is impossible in vertebrates

• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

Tags

NGSS.HS-LS1-3

Net effect is that the output of the system shuts off the original stimulus or reduces its intensity. (Prohibits further change)

• Negative feedback

• Homeostasis

• Positive feedback

• Physiology

Tags

NGSS.HS-LS1-3

Feedback that tends to cause the level of a variable to change in the same direction as an initial change. (Amplifies the effect)

• Negative feedback

• Homeostasis

• Positive feedback

• Physiology

Tags

NGSS.HS-LS1-3

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 

Tags

NGSS.HS-LS1-3

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-4

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 

Tags

NGSS.HS-LS1-3

What is the point of a feedback loop?

• To provide the body with more energy

• To provide the body with more food

• To make sure the conditions in the body are always changing

• To make sure the conditions in the body remain stable

Tags

NGSS.HS-LS1-3