PNB 2274 EXAM 1 QUIZLET
Microvilli - CORRECT ANSWER- foldings of the membrane that increase surface area
for absorption
Function of Microvilli - CORRECT ANSWER- to increase surface area for absorption
Location of microvilli - CORRECT ANSWER- transport epithelia; kidney, intestine, some
parts of the brain
Symporter - CORRECT ANSWER- secondary active transporter that allows two
substances to travel in the same direction
Antiporter - CORRECT ANSWER- primary active pump that moves substances in
opposite directions (ex. Na+ K+ pump)
Uniporter - CORRECT ANSWER- passive movement of one substance with
concentration gradient
Epithelial Tissue Types - CORRECT ANSWER- secretory, protective, transport, ciliated,
exchange
Secretory Epithelia - CORRECT ANSWER- cells are lined up in gland (as in sweat
glands) and release sweat and other substances via vesicles
Secretory Epithelia have a lot of (organelle types) - CORRECT ANSWER- golgi and
endoplasmic reticulum (rough ER for protein, smooth ER for fat)
Protective Epithelia - CORRECT ANSWER- have a lot of keratin and desmosomes that
provide very strong, staple-like junctions
Function of Protective Epithelia - CORRECT ANSWER- to make sure our cells do not
come apart with movement of the body
Type of junction in protective epithelia - CORRECT ANSWER- desmosomes
type of junction in transport epithelia - CORRECT ANSWER- tight junctions
4 Types of Junctions - CORRECT ANSWER- tight, adhering, desmosomes, gap
junctions
, Tight Junctions location - CORRECT ANSWER- more toward the apical surface of
transporting epithelia
function of tight junctions - CORRECT ANSWER- prevent substances from moving
between cells
structure of tight junctions - CORRECT ANSWER- ZO-1 binds with occludin (?)
Components of adhering junctions - CORRECT ANSWER- actin (intra) and cadherins
(extracellular)
Location of adhering junctions - CORRECT ANSWER- deep to tight junctions, they
encircle the cell immediately adjacent to all its neighbors
Location of desmosomes - CORRECT ANSWER- very common in epithelial cells
function of desmosomes - CORRECT ANSWER- hold together cells under a lot of
stress
Button desmosomes function - CORRECT ANSWER- make sure the cells stay in place
and do not pull off from one another and allow bending and twisting
Mutation of proteins in hemidesmosomes can cause - CORRECT ANSWER- digestive
issues (epithelial lining) as well as skin conditions
Structure of gap junctions - CORRECT ANSWER- provide a pore through the
membrane to allow rapid communication between cells through diffusion
How are gap junctions controlled - CORRECT ANSWER- transcription and translation
function of gap junctions - CORRECT ANSWER- homeostasis, cell growth and
regeneration, embryonic development, electrical and metabolic coupling
structure of a pore of a gap junction - CORRECT ANSWER- each pore has two
hemichannels, each made up of 6 pore proteins
Exchange Epithelia - CORRECT ANSWER- have gaps but NOT gap junctions to allow
for exchange of gases
Microvilli - CORRECT ANSWER- foldings of the membrane that increase surface area
for absorption
Function of Microvilli - CORRECT ANSWER- to increase surface area for absorption
Location of microvilli - CORRECT ANSWER- transport epithelia; kidney, intestine, some
parts of the brain
Symporter - CORRECT ANSWER- secondary active transporter that allows two
substances to travel in the same direction
Antiporter - CORRECT ANSWER- primary active pump that moves substances in
opposite directions (ex. Na+ K+ pump)
Uniporter - CORRECT ANSWER- passive movement of one substance with
concentration gradient
Epithelial Tissue Types - CORRECT ANSWER- secretory, protective, transport, ciliated,
exchange
Secretory Epithelia - CORRECT ANSWER- cells are lined up in gland (as in sweat
glands) and release sweat and other substances via vesicles
Secretory Epithelia have a lot of (organelle types) - CORRECT ANSWER- golgi and
endoplasmic reticulum (rough ER for protein, smooth ER for fat)
Protective Epithelia - CORRECT ANSWER- have a lot of keratin and desmosomes that
provide very strong, staple-like junctions
Function of Protective Epithelia - CORRECT ANSWER- to make sure our cells do not
come apart with movement of the body
Type of junction in protective epithelia - CORRECT ANSWER- desmosomes
type of junction in transport epithelia - CORRECT ANSWER- tight junctions
4 Types of Junctions - CORRECT ANSWER- tight, adhering, desmosomes, gap
junctions
, Tight Junctions location - CORRECT ANSWER- more toward the apical surface of
transporting epithelia
function of tight junctions - CORRECT ANSWER- prevent substances from moving
between cells
structure of tight junctions - CORRECT ANSWER- ZO-1 binds with occludin (?)
Components of adhering junctions - CORRECT ANSWER- actin (intra) and cadherins
(extracellular)
Location of adhering junctions - CORRECT ANSWER- deep to tight junctions, they
encircle the cell immediately adjacent to all its neighbors
Location of desmosomes - CORRECT ANSWER- very common in epithelial cells
function of desmosomes - CORRECT ANSWER- hold together cells under a lot of
stress
Button desmosomes function - CORRECT ANSWER- make sure the cells stay in place
and do not pull off from one another and allow bending and twisting
Mutation of proteins in hemidesmosomes can cause - CORRECT ANSWER- digestive
issues (epithelial lining) as well as skin conditions
Structure of gap junctions - CORRECT ANSWER- provide a pore through the
membrane to allow rapid communication between cells through diffusion
How are gap junctions controlled - CORRECT ANSWER- transcription and translation
function of gap junctions - CORRECT ANSWER- homeostasis, cell growth and
regeneration, embryonic development, electrical and metabolic coupling
structure of a pore of a gap junction - CORRECT ANSWER- each pore has two
hemichannels, each made up of 6 pore proteins
Exchange Epithelia - CORRECT ANSWER- have gaps but NOT gap junctions to allow
for exchange of gases
