Cell Transport Mechanisms

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What is the primary mechanism by which the body maintains a stable volume of fluid in each compartment?

Filtration and reabsorption (correct)

Osmosis and facilitated diffusion

Active transport

Diffusion

What is the term describing the ability of an extracellular solution to make water move into or out of a cell by osmosis?

Osmolarity

Oncotic pressure

Hydrostatic pressure

Tonicity (correct)

What is the approximate percentage of body water in a 70kg adult male?

50%

55%

65%

60% (correct)

What type of transport requires energy and is involved in the movement of molecules against their concentration gradient?

Active transport Signup and view all the answers

Which of the following is NOT a type of fluid compartment in the body?

Intramuscular Signup and view all the answers

What is the primary difference in fluid distribution between infants and adults?

Infants have a greater percentage of body water in the interstitial spaces Signup and view all the answers

What occurs in an isotonic solution?

The osmolarity of the cell is the same as the extracellular fluid Signup and view all the answers

Which process requires energy and involves the movement of solutes from an area of low concentration to an area of high concentration?

Active transport Signup and view all the answers

What type of transport proteins are utilized by molecules that are unable to freely cross the phospholipid bilayer?

Channel proteins and carrier proteins Signup and view all the answers

What will happen if a cell is placed in a hypertonic solution?

Water will move out of the cell Signup and view all the answers

Which ions require active transport to move across the cell membrane?

Sodium and potassium Signup and view all the answers

What is the main difference between active transport and facilitated diffusion?

The requirement of energy Signup and view all the answers

What is the primary factor that determines a solution's tonicity?

The total concentration of all solutes in the solution Signup and view all the answers

If a solution has a higher osmolarity than the cell's cytoplasm, what will happen to the cell?

The cell will shrink Signup and view all the answers

What occurs when two solutions of unequal osmolarity are placed together?

Fluid will shift from the solution of higher concentration to the solution of lower concentration Signup and view all the answers

What is the term for a solution that has a lower osmolarity than the cell's cytoplasm?

Hypotonic Signup and view all the answers

What is the direction of water flow when the extracellular fluid is hypotonic to the cell?

Into the cell Signup and view all the answers

What is the result of equalizing the concentration of two solutions of unequal osmolarity?

Both solutions become isotonic Signup and view all the answers