6.6 Homeostasis and Hormones

Homeostasis is the maintenance of a constant...

• internal environment

• external environment

• living environment

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Negative Feedback loops are...

• Purposeful pushes above normal set values.

• Counteract a change to bring it back to normal set values

• Are rare

• Help with childbirth

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Positive Feedback loops are...

• Counteract changes that move above or below set values.

• more common

• regulate body temp

• Purposeful pushes above normal set values.

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When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?

• Negative Feedback Loop

• Positive Feedback Loop

• Neutral Feedback Loop

• Linear Feedback Loop

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What is the function of the endocrine system?

• to filter and eliminate the waste from the blood

• to secrete hormones into the bloodstream to regulate body activities

• to provide structure and support for the body

• to defend the body against pathogens

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What are some major organs of the Endocrine system?

• Heart and blood vessels
• Mouth, Lungs, Bronchi, and Trachea
• Esophagus, Stomach, Small and large instestine
• Pineal gland, Thyroid gland, Adrenal gland, and pancreas

A hormone is

• a chemical substance produced by a gland and carried by the lymph.

• an enzyme produced by a gland and carried by the blood.

• a chemical substance produced by an organ and carried by the blood.

• a chemical substance produced by a gland and carried by the blood.

Cell metabolic rates are controlled by this hormone.

• insulin

• glucagon

• thyroxine

• melatonin

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Which one here is a hormone to control blood glucose levels?

• Glycogen

• Glycerol

• Glucagon

• Glucose

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The diagram shows the mechanisms that control the concentration of glucose in the blood.

Which row identifies the glands and hormones labelled W, X, Y and Z?

• adrenal gland, adrenaline, adrenal gland, glucagon

• adrenal gland, adrenaline, pancreas, insulin

• pancreas, glucagon, adrenal gland, insulin

• pancreas, insulin, pancreas, glucagon

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