Drgawad Mid-module Exam - Physiology
22 MCQ25 minJoin my facebook grouphttps://www. Facebook. Com/groups/1636584326601471/
- 1.Which of the following is true regarding Na K pump:
- A.
It is a form of passive transport
- B.
It has 3 binding sites for K and 2 for Na
- C.
It is important for normal excitability of a nerve
- D.
The K movement depends on the energy released from Na movement
- 2.Regarding glucose transport, which is false:
- A.
It can be transported by secondary active mechanism
- B.
It may be by a carrier protein with concentration gradient without use of energy
- C.
It may be by pinocytosis
- D.
It is never to be through leak channel
- 3.Regarding lipid bilayer transport, which of the following can’t pass by this mechanism:
- A.
Vit K
- B.
O2
- C.
CO2
- D.
None of the above
- 4.Which of the following decrease the rate of diffusion through a membrane:
- A.
Increase membrane surface area
- B.
Low molecular weight diffusing substance
- C.
High resistant protein channels
- D.
Thin plasma membrane thickness
- 5.Regarding secondary active transport which is false:
- A.
Counter transport means that 2 substances transported in opposite direction
- B.
Symport means that 2 substances transported in same direction
- C.
Uniport carrier is not from the carriers responsible for 2ndry active transport
- D.
2ndry active transport is a form of active transport that need ATP to perform transportation of molecules
- 6.Facilitated diffusion means:
- A.
Small molecule carried by a carrier with concentration gradient
- B.
Large molecule carried by a carrier without need for energy against concentration gradient
- C.
Small molecule carried by a carrier against concentration gradient
- D.
Large molecule carried by a carrier with concentration gradient
- 7.Which of the following increases simple diffusion:
- A.
Increase carrier saturation
- B.
Large surface area
- C.
Less concentration difference on both sides
- D.
- none of the above
- 8.Which of the following is an active ligand:
- A.
Na ions
- B.
Acetylcholine
- C.
K ions
- D.
ATP
- 9.Which of the following is true regarding normal resting membrane potential:
- A.
it is not important for normal cells function
- B.
It is due to the selective permeability of healthy membranes
- C.
It is due to passage of electrical impulses through the cell
- D.
It is related to the easily movement of proteins to both sides of the membrane
- 10.Which of the following is not related to hypertonic solutions:
- A.
Cell shrinkage
- B.
Higher solute concentration than that in the cell
- C.
Saline 0.9%
- D.
None of the above
- 11.It is the number of osmoles per kg of solvent:
- A.
Osmotic pressure
- B.
Osmolaity
- C.
Osmolarity
- D.
Osmole
- 12.The pressure needed in the concentrated solution to prevent water movement from the diluted side
- A.
Hydrostatic pressure
- B.
Osmotic pressure
- C.
Filtration pressure
- D.
None of the above
- 13.Normal osmolality of the extracellular and intracellular fluids is:
- A.
300 milliosm/L
- B.
400 milliosm/L
- C.
500 milliosm/L
- D.
None of the above
- 14.It is the movement of water from area of low solute concentration (hypotonic) to area of high solute concentration (hypertonic):
- A.
Osmotic pressure
- B.
Osmolarity
- C.
Osmosis
- D.
Osmole
- 15.Osmotic pressure:
- A.
Is formed at the diluted side
- B.
Is formed at the concentrated side
- C.
Depends mainly on the weight of the particles
- D.
None of the above
- 16.Which of the following leads to cell shrinkage:
- A.
Hypotonic solutions
- B.
Isotonic solutions
- C.
Hypertonic solution
- D.
None of the above
- 17.Movement of water from side to side secondary to hydrostatic pressure is:
- A.
Osmosis
- B.
Filtration
- C.
Diffusion
- D.
Pinocytosis
- 18.•which of the following is an example of positive feedback vicious mechaism:
- A.
Blood clotting
- B.
Child birth
- C.
CO2 feedback mechanism
- D.
Acetyl choline release
- 19.•the three main components of reflex arc:
- A.
Receptor, afferent, center
- B.
Afferent, center, efferent
- C.
Center, efferent, effector
- D.
Receptor, center, effector
- 20.•Which of the following ions has the highest concentration in body:
- A.
Na
- B.
K
- C.
Ca
- D.
Cl
- 21.•Which of the following is an example of negative feedback mechanism:
- A.
Child birth
- B.
CO2 feedback mechanism
- C.
Hemostasis
- D.
None of the above
- 22.•The largest proportional of body water present in:
- A.
Blood
- B.
Cells
- C.
Interstitial
- D.
Transcellular
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