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Physiology Lab at the University of Central Florida

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Chapter 1 Homeostasis and Fundamental Cell Physiology

Question 1 of 17

1

________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane

Select one of the following:

  • Carrier-mediated facilitated diffusion

  • Channel-mediated facilitated diffusion

  • Primary Active Transport

  • Cotransport (symport)

  • countertransport (antiport)

Explanation

Question 2 of 17

1

Which of the following are considered unassisted membrane transport mechanisms?

Select one of the following:

  • simple diffusion

  • Carrier-mediated facilitated diffusion

  • Channel-mediated facilitated diffusion

  • Primary Active Transport

  • Secondary Active Transport

Explanation

Question 3 of 17

1

Which of the following molecules are able to permeate a cell membrane?

Select one or more of the following:

  • steroids

  • glucose

  • ions

  • methanol

  • complex amino acids

Explanation

Question 4 of 17

1

Crenation of a cell would be observed if it was placed in which of the following solutions?

Select one of the following:

  • Hypotonic

  • Hypertonic

  • isotonic

  • both hypotonic and hypertonic

  • both isotonic and hypotonic

Explanation

Question 5 of 17

1

Which of the following constitutes Fick's law of diffusion?

Select one or more of the following:

  • Lipid solubility of substance

  • Molecular weight of substance

  • distance a substance has to travel to cross the membrane

  • magnitude of the concentration gradient

  • surface area of the membrane

Explanation

Question 6 of 17

1

_____________ occurs when the response made by the effector amplifies the changes in the controlled variable cause by a stimulus

Select one of the following:

  • Negative feedback mechanism

  • positive feedback mechanism

  • Feed forward Mechanism

  • Allostasis

  • Positive feedback and feed forward mechanism

Explanation

Question 7 of 17

1

_______ is driven by the direct use of ATP to transport a molecule against its concentration

Select one of the following:

  • Simple diffusion

  • Carrier-mediated facilitated diffusion

  • Channel-mediated facilitated diffusion

  • Primary Active Transport

  • Secondary Active Transport

Explanation

Question 8 of 17

1

Shivering and sweating are examples of which of the following?

Select one of the following:

  • positive feedback

  • negative feedback

  • sensory mechanisms

  • effector mechanisms

  • set points

  • negative feedback and effector mechanisms

Explanation

Question 9 of 17

1

Movement of a substance into a cell against its concentration gradient is caused by _____

Select one of the following:

  • simple diffusion

  • channel-mediated facilitated diffusion

  • osmosis

  • primary active transport

  • Carrier-mediated facilitated diffusion

Explanation

Question 10 of 17

1

Eating a bag of salted potato chips without increasing sodium excretion would result in what sate

Select one of the following:

  • Positive sodium balance

  • Negative sodium balance

  • Stable sodium balance

  • negative glucose balance

  • It can't be determined

Explanation

Question 11 of 17

1

Which of the following are true of a cell (330m Osm internal environment ) placed in a 500mOsm salt solution?

Select one or more of the following:

  • The cell is hypertonic to the solution

  • The cell is hypotonic to the solution

  • The cell is isotonic to the solution

  • The solution exerts a higher osmotic potential than the cell

  • The cell exerts a higher osmotic potential than the solution

Explanation

Question 12 of 17

1

________ occurs when the driver ion and molecule move in opposite directions across the plasma membrane

Select one of the following:

  • Carrier-mediated facilitated diffusion

  • channel-mediated facilitated diffusion

  • primary active transport

  • Cotransport (symport)

  • countertransport (antiport)

Explanation

Question 13 of 17

1

Which of the following is an example of positive feedback in the body?

Select one of the following:

  • blood clotting

  • return of blood pressure to normal after hemorrhage

  • increased respiration rate caused by accumulation of CO2 in the blood

  • decreased sympathetic nervous system activity that occurs in response to increased blood pressure

  • e)all of the above

Explanation

Question 14 of 17

1

_______ is driven by the direct use of ATP to transport a molecule against its concentration

Select one of the following:

  • simple diffusion

  • Carrier-mediated facilitated diffusion

  • channel-mediated facilitated diffusion

  • primary active transport

  • secondary active transport

Explanation

Question 15 of 17

1

Homeostasis is the static constancy of the internal physiological environment

Select one of the following:

  • True
  • False

Explanation

Question 16 of 17

1

Active transport is the movement of a solute against its concentration gradient at the cost of energy

Select one of the following:

  • True
  • False

Explanation

Question 17 of 17

1

When two solutions are isotonic to each other there is non net movement of water

Select one of the following:

  • True
  • False

Explanation

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