Feedback Loops

If the environment gets cold, we will often shiver in order to:

• keep body temperature the same as the external temperature
• decrease body temperature
• increase body temperature
• regulate blood pressure

Tags

NGSS.HS-LS1-3

What type of feedback loop is shown?

• negative
• neutral 
• positive

Tags

NGSS.HS-LS1-3

Negative Feedback Loops:

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

Tags

NGSS.HS-LS1-3

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

Tags

NGSS.HS-LS1-3

Maintaining body temperature is an example of a:

• negative feedback loop
• positive feedback loop

Tags

NGSS.HS-LS1-3

In a positive feedback loop, each action creates a consequence that _____________________ the other action.

• decreases

• has no effect on

• amplifies

In a negative feedback loop, each action creates a consequence that _____________________ the other action.

• decreases

• has no effect on

• amplifies

Tags

NGSS.HS-LS1-3

Does the graph show positive or negative feedback?

• Positive, because when the red line shifts, the blue one does also

• Negative, because the blue line starts below equilibrium

• Negative, because the two actions are keeping each other near equilibrium

• Both positive and negative because the graph moves up and down

Tags

NGSS.HS-LS1-3

Which would be the correct order in a feedback loop?

• effector, control center, sensor, stimulus

• control center, stimulus, sensor, effector

• sensor, stimulus, control center, effector

• stimulus, sensor, control center, effector

Tags

NGSS.HS-LS1-3

When our body temperature goes above 37 degrees, our blood vessels ​ (a)   . This is also known as ​ (b)   . Our body also begins to ​ (c)   . This is done to bring our body temperature back ​ (d)   so we can maintain homeostasis.

• dilate
• vasodilation
• sweat
• down
• shrink
• vasoconstriction
• shiver
• up

Tags

NGSS.HS-LS1-3