BIOL 118 EXAM 1 (UW) QUESTIONS AND ANSWERS
100% VERIFIED
Enzymes are ___ and work efficiently if the Sa:V ratio is ___ - ANSWER Proteins, High
ER & Golgi Apparatus - ANSWER Organelles that refine and package proteins
Osmosis - ANSWER Diffusion of water through a selectively permeable membrane (such as
plasma membrane)
Increase in concentration gradient (increases/decreases) diffusion rate - ANSWER increases
Diffusion - ANSWER Molecules / Ions move away from concentrated areas to less
concentrated area
Simple Difussion - ANSWER Unassisted diffusion through a membrane. Solutes are
Lipid-soluble (such as fats, oxygen, carbon dioxide, fat-soluble vitamins).
Facilitated Diffusion - ANSWER Provides passage for certain needed substances (notably
glucose) that are lipid-soluble and too large to pass without assistance.
Bile Salts are made from ___ and aid in emulsification. Emulsification ___ the Sa:V ratio of
, ingested fat droplets. - ANSWER cholesterol, increases
emulsification - ANSWER breakdown of large fat goblets into tiny fat droplets. an adaptation
or action that increases surface area during the digestion process
Tissues that are tightly attached to each other to form barriers, secretory or absorptive
surfaces. - ANSWER Epithelial tissues
A polar molecule is (hydrophobic/hydrophilic) and is (lipid/water) soluble. - ANSWER
hydrophilic, water
Normally, negative feedback loops work to (maintain/disrupt) homeostasis when a controlled
variable (pH for ex) is (within/outside) its tolerance limits. - ANSWER maintain, within
In the intestine, ___ increase the surface area of epithelial tissue to increase absorption rate? -
ANSWER Plicae, Villi, & microvilli
Active Transport:
Passive Transport:
Is osmosis active or passive? - ANSWER Active: requires work and energy
Passive: doesn't require work and energy
Osmosis is a passive transportive process. Moves water along a concentration gradient.
100% VERIFIED
Enzymes are ___ and work efficiently if the Sa:V ratio is ___ - ANSWER Proteins, High
ER & Golgi Apparatus - ANSWER Organelles that refine and package proteins
Osmosis - ANSWER Diffusion of water through a selectively permeable membrane (such as
plasma membrane)
Increase in concentration gradient (increases/decreases) diffusion rate - ANSWER increases
Diffusion - ANSWER Molecules / Ions move away from concentrated areas to less
concentrated area
Simple Difussion - ANSWER Unassisted diffusion through a membrane. Solutes are
Lipid-soluble (such as fats, oxygen, carbon dioxide, fat-soluble vitamins).
Facilitated Diffusion - ANSWER Provides passage for certain needed substances (notably
glucose) that are lipid-soluble and too large to pass without assistance.
Bile Salts are made from ___ and aid in emulsification. Emulsification ___ the Sa:V ratio of
, ingested fat droplets. - ANSWER cholesterol, increases
emulsification - ANSWER breakdown of large fat goblets into tiny fat droplets. an adaptation
or action that increases surface area during the digestion process
Tissues that are tightly attached to each other to form barriers, secretory or absorptive
surfaces. - ANSWER Epithelial tissues
A polar molecule is (hydrophobic/hydrophilic) and is (lipid/water) soluble. - ANSWER
hydrophilic, water
Normally, negative feedback loops work to (maintain/disrupt) homeostasis when a controlled
variable (pH for ex) is (within/outside) its tolerance limits. - ANSWER maintain, within
In the intestine, ___ increase the surface area of epithelial tissue to increase absorption rate? -
ANSWER Plicae, Villi, & microvilli
Active Transport:
Passive Transport:
Is osmosis active or passive? - ANSWER Active: requires work and energy
Passive: doesn't require work and energy
Osmosis is a passive transportive process. Moves water along a concentration gradient.
