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In a healthy individual in the upright position, the:I. V/Q ratio is highest in the lower lung regionsII. PAO2 is lowest in the upper lung regionsIII. V/Q ratio is lowest in the upper lung regionsIV. PaCO2 is highest in the lower lung regions

Which of the following biomolecules is the main energy source for living things 

Auditors and management must evaluate the likelihood of a company continuing as a going concern for what period of time?

Which of the following pulls the testes closer to the body?

Luteinizing hormone stimulates

Which of the following is true of the Hering-Breuer inflation reflex?

Peripheral chemoreceptors respond to:

A hypothesis must be testable?  

Choose the correct response to the following statement:Minute-to-minute central chemoreceptor control of ventilation is the direct result of changes in __________ and the changes in ___________.

Read the following insert, then answer the correct option choice.  A student decided to set up an experiment to see if cats preferred skim milk, 2% milk, or whole milk. She put out a cup of each type of milk for 5 kittens and then measured how much the kittens drank of each type of milk over the course of a day. This was repeated each day for a week. Each type of milk was served at the same temperature and in the same size container. The kittens drank 50% more of the whole milk than the other types. The student discovered that the cats liked the whole milk more than the other types of milk. What is the independent variable?