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L2 , Molecular structure of the cell membrane and intercellular connections , Physiology

 Lecture Video

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MCQ

1-The cell membrane is … and its thickness is …

a-thick – 5-8mm

b-thick – 5-8nm

c-thin – 5-8mm

d-thin – 5-8nm

e-none of above

2-All of the following is true about cell membrane except:

a-separates and protects the cell

b-fluid rather than solid

c-5-8 nm

d-not flexible

e-semipermeable to substances




3-The main component of cell membrane is … and its percentage is …

a-lipid – 55%

b-proteins – 42%

c-proteins – 55%

d-lipid – 42%

e-carbohydrates – 55%

4-The main component of lipid is ……

a-phospholipids

b-cholesterol

c-glycocalyx

d-glycolipids

e-all of above

5-the function of lipid bilayer is ……

a-attach cells to each other

b-barrier that prevents and permits the movement of substances

c-act as receptor 

d-act mainly as Enzymes

e-all of above

6-…… is dissolved in the phospholipid bilayer.

a-Phospholipids

b-Cholesterol

c-Glycocalyx

d-Glycolipids

e-Proteins

7- Which component of cell membrane that has role in immune response?

a-lipid

b-carbohydrate

c-integral protein

d-peripheral protein

e-all of above

8-The function of integral protein is ……

a-channel for passage of ions.

b-enzymes

c-carrier for transport of substance as glucose and amino acid.

d-all of above

e-none of above 


9-Direct (electrical) communication is present in …… 

a-smooth muscles

b-cardiac muscle

c-skeletal muscles

d-A and B only

e-all of above

10-In direct communication messenger move 

from cell to cell Via:

a- gap junction

b- synaptic cleft 

c- circulating body fluids

d- diffusion in interstitial fluid

e-none of above 

11- In which the chemical messenger binds to receptor (affects) on the same cell ……

a-Autocrine Communication

b-Paracrine Communication

c-Endocrine Communication

d-synaptic Communication

e-all of above

True or False:

12-Direct (electrical) communication is The most common type of communication.


13-The chemical messenger in Paracrine Communication is histamine & prostaglandins.


Answers of MCQs:

1-d

2-d

3-c

4-a

5-b

6-b

7-b

8-d

9-d

10-a

11-a

Answers of True and False:

12-false

13-true





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