PHGY 215 – midterm Exam and Correct
Answers.
3 controls of homeostasis - Answer sensory - sense environmental variable
integrator - compare to set point
effector - initiate change to go back to set point
2 regulations of homeostasis - Answer intrinsic - inside of tissue
extrinsic - outside of tissue
2 feedbacks of homeostasis - Answer negative - initate response in opposite direction to go
back to set point
positive - amplify signal
categorize blood clot, blood pressure, childbirth, body temperature - Answer blood clot -
positive/intrinsic
blood pressure - negative/intrinsic
childbirth- positive/extrinsic
body temperature - negative/extrinsic
functions of:
carbohydrate chains
membrane proteins
phospholipid
ion channels
cholesterol - Answer carbohydrate chains - receptor
membrane proteins - cell structure/function
phospholipid - lipid bilayer head
ion channels - permit entry/exit of ions
cholesterol - tuck between cells (fatty)
3 cell adhesions - Answer CAM - cell adhesion molecules
ECM - extracellular matrix
cell junctions
, CAM - Answer - transmembrane proteins
ECM - Answer - fibrous tissue that allows for diffusion
3 components of ECM - Answer 1. elastin - allows for stretch
2.fibrorectin - promotes cell adhesion
3.collagen - strength
3 types of cell junctions - Answer 1. tight junctions
2. desmosomes
3. gap junctions
desmosomes
- what are they
-found where - Answer - anchors adjacent cells w/ cadherins
-found in skin -> allows for stretch
tight junctions - Answer -impermeable
-kiss sites (opposing junctional sites meet)
-epithelial cells (digestive tract)
gap junctions - Answer - has tunnels for communication
-smooth/cardiac muscles
2 passive transport - Answer 1.diffusion
2.facilitate diffusion
2 active transport - Answer 1. carrier mediated
2. vesicular transport
3 factors that determine what is transported (carrier mediated) - Answer 1. specificity
2. saturation
3. competition
what is
Answers.
3 controls of homeostasis - Answer sensory - sense environmental variable
integrator - compare to set point
effector - initiate change to go back to set point
2 regulations of homeostasis - Answer intrinsic - inside of tissue
extrinsic - outside of tissue
2 feedbacks of homeostasis - Answer negative - initate response in opposite direction to go
back to set point
positive - amplify signal
categorize blood clot, blood pressure, childbirth, body temperature - Answer blood clot -
positive/intrinsic
blood pressure - negative/intrinsic
childbirth- positive/extrinsic
body temperature - negative/extrinsic
functions of:
carbohydrate chains
membrane proteins
phospholipid
ion channels
cholesterol - Answer carbohydrate chains - receptor
membrane proteins - cell structure/function
phospholipid - lipid bilayer head
ion channels - permit entry/exit of ions
cholesterol - tuck between cells (fatty)
3 cell adhesions - Answer CAM - cell adhesion molecules
ECM - extracellular matrix
cell junctions
, CAM - Answer - transmembrane proteins
ECM - Answer - fibrous tissue that allows for diffusion
3 components of ECM - Answer 1. elastin - allows for stretch
2.fibrorectin - promotes cell adhesion
3.collagen - strength
3 types of cell junctions - Answer 1. tight junctions
2. desmosomes
3. gap junctions
desmosomes
- what are they
-found where - Answer - anchors adjacent cells w/ cadherins
-found in skin -> allows for stretch
tight junctions - Answer -impermeable
-kiss sites (opposing junctional sites meet)
-epithelial cells (digestive tract)
gap junctions - Answer - has tunnels for communication
-smooth/cardiac muscles
2 passive transport - Answer 1.diffusion
2.facilitate diffusion
2 active transport - Answer 1. carrier mediated
2. vesicular transport
3 factors that determine what is transported (carrier mediated) - Answer 1. specificity
2. saturation
3. competition
what is
