Free Printable 1.3 - Common Feedback Systems

Worksheets

1.3 - Common Feedback Systems

Total questions: 16

Worksheet time: 48mins

Name

Class

Date

Maintaining body temperature is an example of a:

negative feedback loop

positive feedback loop

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

positive feedback mechanisms

set points

a wide internal range

no regulation

If the environment gets cold, we will often shiver in order to:

keep body temperature the same as the external temperature

decrease body temperature

increase body temperature

regulate blood pressure

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.

Positive Feedback Response

Negative Feedback Loop

As you get dehydrated, your blood becomes thicker and harder to pump. Your kidneys will respond by stopping urine production, sending the water from urine into your bloodstream to thin your blood back to normal level.

Positive Feedback Response

Negative Feedback Loop

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 Response

Negative Feedback Loop

If the calcium in your blood decreases below homeostasis levels, a gland in the brain will sense the decrease and send a chemical message to your bones. Your bones will release calcium into the blood, bringing blood calcium levels back up.

Positive Feedback Response

Negative Feedback Loop

Feedback loops are important because they allow organisms and the environment to

change based on new inputs

fall apart

change based on new outputs

maintain balance

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.

Positive Feedback Response

Negative Feedback Loop

10.

The name for a chemical made by glands that tell cells to make something or respond in some way.

acid

enzyme

perspiration

hormone

11.

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

positive feedback mechanisms

set points

a wide internal range

no regulation

12.

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.

13.

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

Insulin Release

Glucagon Release

Insulin Uptake

Glycogen Uptake

14.

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

15.

If the anterior pituitary does not release TSH, what will happen?

Thyroid follicles will not release T3 and T4

The hypothalamus will release TRH

16.

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.

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1.3 - Common Feedback Systems

Total questions: 16

Worksheet time: 48mins

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