Homeostasis

What does homeostasis do?

• Coordinates body movement through nerve and muscle systems.

• Controls growth through electrical impulses.

• Controls the internal environment of an organism.

• Coordinates the adaptation of organisms to their surrounding environments.

What homeostasis mechanism allows an organism to push an essential process to the finish line by continuing to increase signals?

• neutral feedback loop

• solar feedback loop

• positive feedback loop

• negative feedback loop

What homeostasis mechanism allows an organism to balance with it's surrounding environment?

• neutral feedback loop

• solar feedback loop

• positive feedback loop

• negative feedback loop

What kind of homeostasis mechanism maintains your body temperature?

• negative feedback loop

• positive feedback loop

What type of feedback system is illustrated with this example of an increasing response to a stimulus?

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 continuing in this fashion until the cut is closed.

• Positive

• Negative

What type of feedback system is illustrated with this example of an opposing response to a stimulus?

When you are cold you shiver and your blood vessels contract warming you up. When you are hot you sweat and your blood vessels expand cooling you down.

• Positive

• Negative

What type of feedback system is illustrated with this example of an increasing response to a stimulus?

When a woman is ready to give birth the release of hormones signal contractions to occur putting pressure on the cervix to widen. This increased pressure on their cervix then releases more hormones that signal even more contractions and puts more pressure on their cervix. It continues in this increasing loop until the baby is born.

• Positive

• Negative

What cell structure common to ALL LIFE FORMS (plant, animal, bacterial) is responsible for what goes in and out of the cell?

• Cell Wall

• Cell Membrane

• Cytoplasm

• DNA

What cell structure present in plants but NOT ANIMALS gives them their rigid shape and protection?

• DNA

• Protein

• Cell Membrane

• Cell Wall

What component forms the two layers of the cell membrane?

• Carbohydrates

• Proteins

• Phospholipids

• Cholesterol