Cell membrane & its environment Flashcards by tricia diaz

Q

__% of human body is water

a) 20
b) 40
c) 60
d) 75

A

c

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Q

Intracellular fluid is __% of body weight

a) 20
b) 40
c) 60
d) 75

A

b

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Q

Plasma is __% of body weight

a) 5
b) 10
c) 12
d) 15

A

a

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Q

Which is an example of insensible water loss

a) stomach & intestine
b) skin & lungs

A

b

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Q

Blood clotting is a

a) neg feedback
b) positive feedback

A

b

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Q

Increase in one result to decrease of other

a) neg feedback
b) positive feedback

A

a

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Q

Which of the following is not function of plasma membrane

a) acts as a site of signal transduction
b) confers structural integrity
c) provides matrix for protein transport
d) none of the above

A

b

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Q

Makes both lipids and proteins more hydrophilic

a) cholestorol
b) lipids
c) carbohydrate
d) glucoe

A

c

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Q

Makes the membrane inpermeable to water and water soluble substance

a) cholestorol
b) lipids
c) carbohydrate
d) glucoe

A

b

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Q

The following are major types of lipids except

a) glycolipids
b) phospholipids
c) carbohydrate
d) cholesterol

A

c

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Q

Phospholipids has __ head and __ tail

a) hydrophobic-hydrophilic
b) hydrophobic-hydrophobi
c) hydrophil-hydrophobic
d) hydrophilic-hydrophilic

A

c

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Q

Makes membrane less permeable to small water soluble molecules

a) cholestorol
b) lipids
c) carbohydrate
d) glucoe

A

a

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Q

T/F: Not all membrane lipids are amphipatic only phospholipid and glycolipids

A

f

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Q

T/F Phospholipid bilayer are more stable than micelle

A

t

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Q

Phospholipids has __ head and __ tail

a) polar-non polar
b) non-polar-polar
c) polar-polar
d) nonpolar-non polar

A

a

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Q

Makes the cell more water friendly

a) carbohydrates
b) glycolipids
c) phospolipids
d) cholesterol

A

b

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Q

Very frequent phenomenon

a) lateral diffusion
b) rotation
c) flexion
d) flip flop

A

a

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Q

happens near the center of bilayer

a) lateral diffusion
b) rotation
c) flexion
d) flip flop

A

c

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Q

occurs in the long axis and very rapid

a) lateral diffusion
b) rotation
c) flexion
d) flip flop

A

b

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Q

explains cellular growth and expansion

a) lateral diffusion
b) rotation
c) flexion
d) flip flop

A

a

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Q

rare event, move from one monolayer to another

a) lateral diffusion
b) rotation
c) flexion
d) flip flop

A

d

Q

__ tends to slow down lateral mobility

a) carbohydrates
b) glycolipids
c) phospolipids
d) cholesterol

A

d

Q

Saturated FA form __ hydrocarbons; while unsaturated form __

a) straight - more viscious
b) straight -kink
c) kink -straight
d) kink -easier to pack

A

b

Q

Functions of protein
E-
T-
R-
S-
P-
C-
A-

A

enzyme
transport
receptor
structural
pumps
channel
antigens

Which of the ff. type of protein is amphipatic? a) integral protein b) peripheral protein

a

Associate w/ polar regions of the membrane a) integral protein b) peripheral protein

b

T/F: Integral protein protein is anchored to two of the leaflets of the membrane

F

T/F: Integral protein can not undergo flip flop motion

T

Gangliosides are found in ___; galactocerebroside are foun in ___ a) myelin sheath- nerve cells & intestinal cells b) nerve cells & intestinal-myelin sheath

b

Which of the ff. is not the function of cytoskeleton: a) permits cell motility b) binding site for RNA and proteins c) allows contraction in muscle cell d) all of the above

d

Form contractile rings during mitosis a) actin b) microtubules c) intermediate filaments d) microfilaments

a

link together at z disk of myofibrils a) actin b) microtubules c) intermediate filaments d) microfilaments

c

link dense bodies in smooth muscle a) actin b) microtubules c) intermediate filaments d) microfilaments

c

made up of actin a) actin b) microtubules c) intermediate filaments d) microfilaments

d

rapid assembly and disassembly a) actin b) microtubules c) intermediate filaments d) microfilaments

b

chromosomal movement during meiosis and mitosis a) actin b) microtubules c) intermediate filaments d) microfilaments

b

Microtubule assemble in __ and disassemble in ___ a) cold- warm b) warm- cold

b

Function of membrane junction, except: a) cell communication b) site between adjacent cell c) structural integrity d) cell adhesion

c

Fasten cell to other cell: a) zonula adherens b) zonula occludens c) macula adherens d) hemidesmosomes

c

Which of the ff is not an anchoring junction? a) zonula adherens b) zonula occludens c) macula adherens d) hemidesmosomes

b

no extracellular space between cells, also known as paracellular gates a) zonula adherens b) zonula occludens c) macula adherens d) hemidesmosomes

b

connect cell to basement membrane a) zonula adherens b) zonula occludens c) macula adherens d) hemidesmosomes

d

Nexuses or gap junctions is a) achoring b) occluding c) communicating

c

serve to stabilize cell colonies a) achoring b) occluding c) communicating

a

important in growth and differentiation a) achoring b) occluding c) communicating

c

T/F: Both blood and bone has fluid ECM

F

Functions of ECM except a) allow cells to communicate b) wound healing c) remodels, degrades, and resynthesize d) none of the above

a

T/F: All types of membrane lipid is amphipatic

T

T/F: All types of membrane protein is amphipatic

F

Makes the membrane more hydorphilic a) membrane lipid b) membrane protien c) membrane carbohydrate d) cholesterol

c

__ confers flexibility to the membrane a) membrane lipid b) membrane protien c) membrane carbohydrate d) cholesterol

d

RBCs are able to squeeze in smallest cappilaries beause of a) membrane lipid b) membrane protien c) membrane carbohydrate d) cholesterol

a