PBS 2.1.5 Feedback Loops

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

A feedback loop best fits which characteristic of life?

• Cells

• Organization

• Homeostasis

• Adaptation

Tags

NGSS.HS-LS1-3

In this body temperature feedback loop, predict what would happen if cooling mechanisms were NOT activated?

• The body would not warm up.

• The body would not cool down.

• Your body would get colder and colder.

• Your body would release lots of heat.

Tags

NGSS.HS-LS1-3

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

• Insulin Release

• Glucagon Release

• Insulin Uptake

• Glycogen Uptake

Tags

NGSS.HS-LS1-3

What happens if stretch receptors are activated in the uterus?

• Oxytocin will cause uterine muscles to relax

• Contractions will get weaker

• The baby will be born later than normal

• The brain will signal for the release of oxytocin

Tags

NGSS.HS-LS1-3

What is the difference between what will happen if their is too much Glucose or too little Glucose? SELECT ALL THAT APPLY

• With too much Glucose, Insulin is released. With too little Glucose, Glucagon is released.

• With too much Glucose, the pancreas produces insulin. With too little Glucose, the pancreas produces glucagon.

• With too much Glucose, Glucagon is released. With too little Glucose, Insulin is released.

• There is no difference.

Tags

NGSS.HS-LS1-3

Your body temperature rises as you walk around outside in Bangladesh on a hot afternoon. The sensors in your skin detect the rise in your surface temperature so you start to sweat.

• Positive Feedback

• Negative Feedback

Tags

NGSS.HS-LS1-3

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.

• Positive Feedback

• Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS3-5

As the Earth warms, ice cover melts, exposing soil or water. Albedo decreases (albedo is the fraction of light that is reflected by a body or surface). More energy is absorbed by the Earth’s surface. Global temperature rises. More ice melts.

• Positive Feedback

• Negative Feedback

Tags

NGSS.HS-ESS2-2

NGSS.HS-ESS2-4

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

Tags

NGSS.MS-LS1-8