Homeostasis and Feedback Mechanisms
Authored by Laura Clark
Biology
9th Grade
NGSS covered
Used 477+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the environment gets cold, we will often shiver in order to:
Tags
NGSS.HS-LS1-3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The two types of feedback systems that help organisms maintain homeostasis are:
Tags
NGSS.HS-LS1-3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Maintaining body temperature is an example of a:
Tags
NGSS.HS-LS1-3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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 a:
Positive Feedback Loop
Negative Feedback Loop
Tags
NGSS.HS-LS1-3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following scenarios describes a positive feedback mechanism?
After childbirth, high levels of prolactin induce lactation in the mother. During nursing, infant suckling triggers the release of more prolactin, which further stimulates lactation.
After eating, blood glucose levels rise, stimulating the release of insulin from the pancreas. Insulin causes cells to uptake glucose from the blood, lowering blood glucose levels.
several hours after a meal, blood glucose levels begin to drop, prompting the pancreas to secrete glucagon. Glucagon causes the liver to convert stored glycogen into glucose, raising blood glucose levels.
During exercise, an increase in body temperature causes the body to produce sweat. As the sweat vaporizes, the body cools down due to evaporative cooling.
Tags
NGSS.HS-LS1-3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a negative feedback loop, what happens to a variable (like temperature) when it increases past its normal state?
It continues to increase.
It decreases until it resumes its normal state.
It decreases until it is lower than its normal state.
It does not change.
Tags
NGSS.HS-LS1-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rapid growth during puberty causes your body to release more and more growth hormones. As you grow, more and more growth hormones are released until puberty is reached, and then the hormones stop.
Positive feedback
Negative feedback
Tags
NGSS.HS-LS1-3
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