Define the following in own words in simple terms.
a) mastication
b) bolus
c) peristalsis
d) mechanical digestion
e) chemical digestion
f) chyme
Define and contrast the following mechanisms for nutrientpassage across cell membranes. (in own words in simple terms.)
a) simple diffusion
b) facilitated diffusion
c) active transport
d) osmosis
Define the following in own words in simple terms.
a) mastication
b) bolus
c) peristalsis
d) mechanical digestion
e) chemical digestion
f) chyme
Define and contrast the following mechanisms for nutrientpassage across cell membranes. (in own words in simple terms.)
a) simple diffusion
b) facilitated diffusion
c) active transport
d) osmosis
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Related questions
Substances can move across the membrane via simple diffusion, facilitated diffusion, or active transport.
| Where does it occur in membrance? | Does it require transport protein? | Does it require input of energy? | |
| Simple diffusion | |||
| Facilitated diffusion | |||
| Actove transport |
a. What functions might each of the three types of diffusion serve in an independent cell like a Paramecium or an amoeba?
b. What functions might each of the three types of diffusion serve in a multicellular organism---for example, a human or a tree?
c. What would you need to observe or measure to determine whether a substance was moved across a membrane via each type of diffusion?
