FNDH 400 Exam 2 Questions with Correct Answers

FNDH 400 Exam 2 Questions with Correct
Answers
Crypts of Lieberkuhn

pits b/w villi

Do crypts contain stem cells true/false

true

Enterocytes a type of cell from the stem cells in crypt mature as you go down more into

the crypts true/false

False enterocytes mature as the resin or migrate up the villus out of the crypt

What happen to enterocytes as they reach the top of the villus

They are sloughed off and either digested as lip and protein contain or excreted in feces

Absorption is defined as reaching the muscle true/false

false reaching the body circulation

Compounds that are taken up might not necessarily be absorbed because the enterocyte

containing the compound might be sloughed off before absorption occurs. true/false

true

At the top of villi are the crypts of Lieberkühn which contain stem cells, many of which

differentiate to become enterocytes as they move down the villi, before ultimately being

sloughed off. true/false

false found in the pits between villi, and the enterocytes move up not down villi

,Which is not a macronutrient digestion product ready for uptake

A. glucose B. tripeptide C. 2-monoglycerides D. fatty acids E. sucrose

E. sucrose

Which is not a protein the thelps move compounds through the phospholipid bilayer cell

membrane A. pump B. carrier C. channel D. transporter E. tunnel

E. tunnel

Active transport does not require energy to move with a concentration gradient

true/false

False passive does active requires energy to move against the concentration gradient

Cleaving a phosphate bond (dephosphorylation) generally releases energy. true/false

true

Osmosis moves solvent instead of solute true/false

true

A solute moving from lower concentration to higher concentration across a membrane

is moving with its concentration gradient. true/false

false moving against its concentration gradient

What are the three forms of passive uptake/transport

simple diffusion, osmosis, facilitated diffusion

n simple diffusion, a solute moves from a region with higher solute concentration across

a membrane to a region with lower solute concentration with the help of a protein

true/false

, false everything is true accept it does not need help from a protein

n osmosis, water moves from a region with higher solute concentration across a

membrane to a region with lower solute concentration. true/false

false low concentration to high concentration

Facilitated diffusion is like simple diffusion except that a carrier or transport protein is

needed to facilitate solute movement across the membrane. true/false

true

Active carrier transport and facilitated diffusion both use a carrier or transport

protein, but active carrier transport uses energy and moves with the concentration

gradient. true/false

false moves against the concentration gradient

A compound that is endocytosed is taken into the cell in vesicles formed from the cell

membrane. true/fals

true

Match each term with the correct thing it is taken up by

A. Monosachcarides B. Glucose/Galactose C. Fructose

1. SGLT1 2. GLUT5 3. enterocyte

A-3 B-1 C-2

GLUT transporters are active carrier transporters, as a result they use energy and

transport solutes against the concentration gradient. true/false

false use facilitated diffusion thus no energy use and with the concentration gradient

Lymph goes into blood via the thoracic duct true/false