Quiz about Positive and Negative Feedback Loops

Question 1

What type of feedback loop is shown?

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Question 2

What type of feedback loop is shown?

Accepted Answer

positive

Answer

negative

Answer

neutral

Question 3

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

Accepted Answer

positive and negative

Answer

receptor and effector

Answer

static and dynamic

Answer

minor and major

Question 4

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.

Accepted Answer

Positive Feedback Response

Answer

Negative Feedback Loop

Question 5

Loops that cause a response to build up and build up until something big happens are called ____________ loops

Accepted Answer

positive

Answer

negative

Question 6

Negative Feedback Loops:

Accepted Answer

prevent small changes from getting larger

Answer

amplify processes

Answer

are initiated during childbirth

Answer

are found only in plants

Question 7

Maintaining body temperature is an example of a:

Accepted Answer

negative feedback loop

Answer

positive feedback loop

Question 8

What is the point of a feedback loop?

Accepted Answer

To make sure the conditions in the body remain stable

Answer

To provide the body with more energy

Answer

To provide the body with more food

Answer

To make sure the conditions in the body are always changing

Question 9

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

Accepted Answer

Insulin Release

Answer

Glucagon Release

Answer

Insulin Uptake

Answer

Glycogen Uptake

Question 10

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.

Accepted Answer

Negative Feedback Loop

Answer

Positive Feedback Response

Question 11

Higher temperatures cause more evaporation which leads to more water vapor in the atmosphere. Water vapor is a greenhouse gas so will trap more heat so the atmosphere will warm more.

Accepted Answer

Positive Feedback

Answer

Negative Feedback

Question 12

As the Earth warms, upper layers of permafrost melt, producing waterlogged soil above frozen ground. Methane gas is released into the environment. The greenhouse effect is enhanced. The Earth warms, melting more permafrost.

Accepted Answer

Positive Feedback

Answer

Negative Feedback

Question 13

As the Earth warms, organic matter in soil is decomposed faster, more carbon dioxide is released. The enhanced greenhouse effect occurs, the Earth warms further and rates of decomposition increase

Accepted Answer

Positive Feedback

Answer

Negative Feedback

Question 14

A thermostat in a central heating system can determine the temperature of your living room. It switches the air conditioner on when the temperature increases to a predetermined level and shuts it off when it cools to another level. The room temperature remains within a comfortable level regardless of the temperature outside

Accepted Answer

Negative Feedback

Answer

Positive Feedback

Question 15

Some organisms have internal feedback systems. Physiological changes occur to prevent breeding when population densities are high and promote breeding when population densities are low.

Accepted Answer

Negative Feedback

Answer

Positive Feedback

Question 16

Which of the following is an example of a positive feedback loop in the human body?

Accepted Answer

Blood clotting process

Answer

Regulation of blood sugar levels

Answer

Body temperature regulation

Answer

Water balance in kidneys

Question 17

What is the main characteristic of a negative feedback loop?

Accepted Answer

It stabilizes a system

Answer

It amplifies changes

Answer

It speeds up processes

Answer

It is irreversible

Question 18

In a feedback loop, what role does the effector play?

Accepted Answer

Carries out responses to changes

Answer

Detects changes in the environment

Answer

Processes information

Answer

Sends signals to the control center

Question 19

Which of the following scenarios is an example of a negative feedback loop?

Accepted Answer

Thermoregulation in humans

Answer

Childbirth contractions

Answer

Blood clotting

Answer

Fruit ripening

Question 20

How does a positive feedback loop differ from a negative feedback loop?

Accepted Answer

Positive feedback loops amplify changes

Answer

Positive feedback loops are more common

Answer

Positive feedback loops stabilize systems

Answer

Positive feedback loops are reversible

Question 21

Which of the following is a real-world example of a positive feedback loop?

Accepted Answer

A microphone causing a loudspeaker to produce a loud noise

Answer

A thermostat maintaining room temperature

Answer

A refrigerator cooling food

Answer

A car's cruise control maintaining speed

Question 22

What is the purpose of feedback loops in biological systems?

Accepted Answer

To maintain homeostasis

Answer

To disrupt homeostasis

Answer

To increase energy consumption

Answer

To decrease energy consumption

Question 23

Which feedback loop is primarily involved in the process of childbirth?

Accepted Answer

Positive feedback loop

Answer

Negative feedback loop

Answer

Neutral feedback loop

Answer

Reversible feedback loop

Positive and Negative Feedback Loops

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