Lesson 1.7 Stability of Living Things

Reorder

Place the steps of a negative feedback mechanism and try to put them in the correct order. Just do your best (we haven't learned this yet!)

• a variable in the body changes from the set point

• receptor cells detect the change

• a correction mechanism turns on

• body conditions return to the set point

• the feedback mechanism turns off

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Select

Refer to the diagram. What two organs play an essential role in maintaining blood glucose levels?

• heart

• pancreas

• liver

• bladder

Multiple Select

Refer to the diagram. Identify the two stimuli in this feedback loop. Select all that apply (2).

• blood glucose level falls

• blood glucose level remains the same

• blood glucose level rises

• body cells take up glucose

Multiple Choice

Refer to the diagram. What happens immediately after blood glucose levels rise?

• liver breaks down glycogen

• blood glucose level falls

• alpha cells in pancreas release glucagon

• beta cells in pancreas release insulin

Multiple Choice

Refer to the diagram. What is the "end goal" of a negative feedback mechanism?

• maintain homeostasis

• maintain correct glucose levels only

• create new body systems

• defeat positive feedback mechanisms

Multiple Choice

Refer to the diagram. If a person's blood glucose level was 130mg/100ml, would you say their blood glucose level is too high or too low?

• too high

• too low