Homeostasis

Organ systems:

• Supply body cells with all the substances they need to eliminate waste.

• Keep temperature at the right levels.

• Keep pH at the right levels.

• All of the above

In the respiratory system, a high level of ____________in the blood triggers faster breathing.

• Oxygen

• Carbon Dioxide

• Iron

• Hydrogen

In the excretory system, a low level of______________in the blood triggers retention of water in the kidneys.

• Salt

• Potassium

• Water

• Ammonia

In the endocrine system, a high concentration of ___________in the blood triggers secretion of insulin by an endocrine gland called the pancreas.

• salt

• bile

• sugar

• iron

An example of positive feedback is:

• Milk production in nursing mothers

• The secretion of insulin from the Pancreas

• The production of sweat in an overheated person

• The retention of water in the kidneys of an overheated person

The regulation of your internal environment is done primarily through___________________feedback

• Negative

• Positive

• Neutral

• All of the above