Upgrade to remove ads
Lab Quiz 2 Review
Terms in this set (32)
movement of molecules through the membrane; usually refers to something that is going through a channel
allows specific molecules, or ions to cross the cell membranes
transport is driven by concentration gradient or pressure differences
energy is needed to transport
diffusion without assistance through a channel
diffusion with assistance of carrier
diffusion of water
movement across a membrane due to pressure
a group of cells working together for a specific function; the cells do not have to be similar; the cells do have to work together
comprised of only epithelial cells; polar: meaning 2 sides; avascular; function: absorption, filtration, protection
always touches connective tissue
on layer of cells
more than one layer of cells
Describe 2 variables that affect the rate of diffusion
concentration, molecule size, temperature
Why was the urea unable to diffuse through the 20 MWCO membrane?
it was too large
Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane.
Glucose moved through the membrane and albumin did not
Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea
NaCl, Urea, Glucose, Albumin; based on pore size with exception of albumin (which is too large)
Explain one way in which facilitated diffusion is the same as simple diffusion
both use the concentration gradient of a molecule
Explain one way in which facilitated diffusion is the different form simple diffusion
facilitated diffusion utilizes a channel or carrier, while simple does not
The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucose transport. Explain why the rate increased.
When the number of glucose carriers is increased, the amount of glucose that can be carried increases
Explain what effect NaCl might have on glucose transport.
There is no effect because the NaCl has no effect on glucose
Explain the effect that increasing the NaCl concentration had on osmotic pressure and why it has this effect.
it increases the pressure because the concentration gradient is higher
Describe one way in which osmosis is similar to simple diffusion and one way in which it is different
They are similar because neither require a carrier; different because osmosis deals strictly with the diffusion of water and not molecules like simple diffusion
Solutes are sometimes measured in milliosmoles. Explain the statement. "Water chases milliosmoles"
water will travel to the higher concentration
Explain in your own words why increasing the pore size increased the filtration rate.
essentially the filters holes were larger so the rate was faster
Which solute did not appear in the filtrate using any of the membranes?
The powdered charcoal because it was too large
Why did increasing the pressure increase the filtration rate but not the concentration of solutes?
Increasing the pressure increases the rate but does not effect permeability
Describe the significance of using 9 mM sodium chloride inside the cell and 6 mM potassium chloride outside the cell, insnares of other concentration ratios
to accommodate the fact that the sodium potassium pump moves 2 Na ions for every 3 K ions
Explain why there was no sodium transport even though ATP was present.
ATP was present but there were no pumps in which to pump the Na
Explain why the addition of glucose carriers had no effect on sodium or potassium transport
glucose carriers only carry glucose
Do you think glucose is being actively transported or transported by facilitated diffusion anthems experiment?
Transported by facilitated diffusion with glucose carriers. No ATPn is used
This set is often in folders with...
Exercise 1: Activity 1-5
A&P Physio Ex
lab 1 review results
Lab 1.5: Stimulating Active Transport
You might also like...
PhysioEx Exercise 1: Activity Questions
Physiology Lab Experiment 1
BIO 12 Lab Quiz 1
Cell transport mechanism and Permeability
Other sets by this creator
NBCE Part 4 Boards - EXAMS; Orthos
PT Boards Questions
Activator II Upper Extremity
Activator II Lower Extremity
Other Quizlet sets
ChNS + zaburzenie krążenia obwodowego PV
Formulas 2 category quiz 2
Module 1 and 2 (Exam #1)
PSYC 2301 Chapter 11