Homeostasis Summary

Homeostasis

• allows for a wildly fluctuating internal environment

• is impossible in vertebrates

• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation

Homeostasis in the human body is often maintained by a: 

• neutral feedback loop 
• solar feedback loop
• positive feedback loop
• negative feedback loop

Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

If pressure increases on a mothers cervix during childbirth then oxytocin increases, this is an example of ____ feedback?

• Thermoregulation

• Blood Pressure

• positive

• negative

What is the evaporation of a liquid to cool the body?

• Shivering
• Sweating
• Vasodilation
• Vasoconstriction

What is involuntary contractions of voluntary muscles to warm up?

• Shivering
• Sweating
• Vasodilation
• Vasoconstriction

When the body temperature drop below normal ranges, arterioles in the skin will

• dilate to allow less blood to flow to skin surface

• constrict to allow less blood to flow to skin surface

• dilate to allow more blood to flow to skin surface

• constrict to allow more blood to flow to skin surface

Which hormone is released when blood sugar gets too high?

• glucose

• glucagon

• glycogen

• insulin

Which of the following is NOT the system that regulate the blood sugar level?

• Circulatory system
• Muscle system
• Endocrine system
• Digestive system

Failure in the production, secretion and intake of insulin by target cells can cause

• diabetes insipidus
• hypoglaecemia
• hyperglaecemia
• diabetes mellitus