Body Fluids & Transport Mechanisms (quiz 1)

Question 1

Name something that would increase facultative water loss?

Answer 1

Intake of excess fluids

Question 2

Describe how the total body balance of any chemical substance is determined.

Answer 2

The difference between the amount of substance lost from the body and the amount gained by the body.

Question 3

How would you calculate plasma volume?

Answer 3

Extracellular fluid volume - interstitial fluid volume = plasma volume

Question 4

How can ECF volume be measured?

Answer 4

Using a single indicator.

Question 5

Describing a physiological variable as homeostatic means:

Answer 5

It is in a state of dynamic constancy that is regulated to remain near a stable set point value.

Question 6

Ion channels in cell membranes…

Answer 6

May open in response to binding a ligand.

Question 7

If you were to infuse a solution containing 150 mM NaCl into a patient with low blood volume, what type of solution is it?

Answer 7

Isotonic. NaCl will keep the added volume in the extracellular fluid compartment.

Question 8

What type of cellular transport involves the cytosolic protein clathrin?

Answer 8

Receptor-mediated endocytosis.

Question 9

A solute, X, is placed in compartment A of a two-compartment container allowed to diffuse to compartment B and attain diffusion equilibrium. At that point in time…

Answer 9

Solutes will be moving in both directions equally.

Question 10

Explain the arrangement of the phospholipid bilayer.

Answer 10

Arranged so that the hydrophilic heads of the phospholipid molecule face the extra- and intracellular fluids.