X hits on this document

Word document

Problem set: water and solute movement across membranes - page 6 / 10

52 views

0 shares

0 downloads

0 comments

6 / 10

Problem set: water and solute movement across membranes

25.

In the diagram below are ECF and ICF compartments separated by a membrane permeable to water and to K+  Use this as the starting condition for the questions below.  

ICF

_? osmoles

 25 liters

ECF

3700 mosmoles

 10 liters

 added solution:

2% KCl

g.

What is the osmolarity in the ICF before any KCl solution is added?

h.

500 ml of a 2% potassium chloride solution will be added to the ECF.  What is the osmolarity of the KCl solution?  (molecular weight of K= 39.1, Cl = 35.5) (KCl has a disassociation constant of 1.6)

i.

The KCl solution  is:  (circle choice) hyposmotic /isosmotic /hyperosmotic to the body.

j.

After the KCl solution is added, how does the osmolarity of the body change?

(circle your answer):osmolarity decreasesno change osmolarity increases

k.

The K+ ions diffuse through an open ion channel into the ICF but the Cl- ions cannot move into the ICF.  Which compartment has a higher concentration of non-penetrating solutes after the addition of the KCl solution (before water or solutes move)?

the ECFthey are the samethe ICF

l.

What is the tonicity of the KCl solution?

Document info
Document views52
Page views57
Page last viewedMon Dec 05 12:40:51 UTC 2016
Pages10
Paragraphs429
Words3186

Comments