Positive & Negative Feedback Loops Questions & Answers PDF

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Positive & Negative Feedback Loops Questions & Answers...

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Positive and Negative Feedback Loops Video Review Sheet www.bozemanscience.com/positive-and-negative-feedback-loops You will watch video and answer the following questions and blanks. Then save this document and turn it in through the Submit-It link as a scored Assignment. 1. Introduction a. Negative Feedback loop: dance around that point, brings you… -

Closer to the target set point

b. Positive Feedback loop: amplifying and moving -

Away from the target set point

c. What can alterations in our feedback loops lead to? -

T

s

2. Negative Feedback a. Homeostasis defined: -

Internal stable environment

b. How does a hairless cat maintain homeostasis? Through -

Feedback loops

c. Ectotherms defined: -

The external temperature is the same as the internal temperature

d. Endotherms defined: -

An internal temperature that will consist

e. What types of feedback loop do we use to maintain our temperature? i. If too hot, we (also explain why we would do that): -

We use Negative feedback loop to maintain our body temperature. If too hot, we start to sweat because the water molecules begin to evaporate creating an

b. What two hormones help with blood glucose regulation: -

Insulin and Glucagon

c. What organ and what other job does it have? -

The pancreas, it empties and digests enzymes into the small intestine to break down food, but it also regulates the glucose levels.

d. What are the two cells found in the pancreas and what does each do? -

The beta and alpha cells they sense the blood glucose levels. The Beta triggers an influx of calcium and increases the amount of insulin its giving off, it secretes insulin from the pancreas, the liver will store it as glycogen, and it will cause your glucose levels to go down. The Alpha creates Glucagon. e from glycogen in the liver.

e. Why does the blood glucose levels usually rise three times per day?

-

f.

What else was rising at the same time?

-

Glucose and Insulin

g. What is wrong when you have type I diabetes? -

Beta cells don’t work, they do not produce insulin.

h. What is type II diabetes a result of usually? -

Obesity, lack of exercise and too much glucose throughout your whole life.

i.

What pattern do you see with diabetes worldwide and why is that?

-

The pattern is that it’s mostly due to a high fat and glucose diet (type 2 diabetes) but it’s also tied to a mistake in the feedback loop (type 1 diabetes)....