What is a negative feedback loop?

• A process that amplifies changes in a system

• A process that reduces changes in a system

• A process that has no effect on a system

• A process that only occurs in biological systems

What might your body’s response be if your body temperature is falling too low?

• Shivering

• Sweating

• Increased heart rate

• Decreased breathing rate

The individual’s pulse changed after placing their hand in ice water because:

• The cold temperature causes blood vessels to constrict, increasing heart rate.

• The cold temperature causes blood vessels to dilate, decreasing heart rate.

• The cold temperature has no effect on pulse rate.

• The cold temperature directly increases blood pressure, lowering pulse rate.

What happened to the cells when they were moved from fresh water to salt water?

• The cells shrank due to osmosis.

• The cells expanded and burst.

• The cells remained unchanged.

• The cells multiplied rapidly.

What might happen to your cells if you drank ocean water?

• Your cells might become dehydrated.

• Your cells might become hydrated.

• Your cells might remain unchanged.

• Your cells might multiply rapidly.

What was the cause of death of Jennifer Strange?

• Drowning

• Electrocution

• Water intoxication

• Car accident

How does urinating help your body maintain homeostasis?

• By regulating body temperature

• By removing waste and excess substances

• By increasing blood pressure

• By providing energy to cells

What happened to the individual’s pupils when a light was shined near their eyes?

• They dilated.

• They constricted.

• They remained the same.

• They changed color.

Which type of organisms can control their own temperature?

• endothermic organisms

• ectothermic organisms

• unicellular organisms

• photosynthetic organisms

What are examples of cold blooded organisms?

• birds

• fish

• amphibians

• reptiles

• mammals