Here are some multiple choice questions about central themes of animal physiology and the membrane potential. This file have 44 MCQs about animal physiology.

1. ANIMAL PHYSIOLOGY
Multiple Choice Questions
MARCH 31, 2018
YOUSAF RAFIQUE
Yousaf1438@gmail.com

2. Animal Physiology
Central Themes in Physiology
1) The study of how animal works is called
a) Paleontology
b) Entomology
c) Physiology
d) Genetics
2) Animal physiology is thebases for
a) Adaptation and evolution
b) Immunology and animal behavior
c) Social interaction and environmental biology
d) All above
3) Sub-divisionsof animal physiology are
a) Comparativephysiology
b) Environmental physiology
c) Evolutionary physiology
d) All above
4) In central themes of physiology,we study
a) Structural-function relationship
b) Adaptation
c) Conformity
d) All above
5) In structural-function relationship,_________ is based upon _________.
a) Structure, function
b) Function, structure
c) Structure, adaptation
d) Function, adaptation
6) Structural-function relation is further divided into
a) Molecular interaction
b) Compartmentation of body cell
c) Mechanical properties of cells and organ system
d) All above
7) Molecules interactwith _________ to perform certain functions related to them.
a) Organic molecules
b) Each other
c) Inorganic molecules
d) Environmental gases
8) The ability to bind or reactwith molecules is essential for _________.
a) Biological functions
b) Internal functions
c) External functions
d) Both b & c
9) The ability to bind is dependent upon the
a) Environmental pressure
b) Temperature
c) Molecular structure
d) Molecular function
10) The simpleexamples of molecular interaction level to perform biological functions are
a) Proteins

3. Animal Physiology
b) Carbohydrates
c) Enzymes
d) All above
11) Choose the correct order of describingcompartmentation of body cells.
a) Organs,organelles,cells,tissue,organism
b) Cells,tissue,organelles,organs,organism
c) Organelles,cells,organs,tissues,organism
d) Organelles,cells,tissues, organs,organism
12) The presence of certain __________ that allowa tissueor organ to specializeand isolatefunctions.
a) Chemicals
b) Compartments
c) Reagents
d) Sugars
13) ______ separatecells fromone another and form extracellular fluid.
a) Enzymes
b) Temperatures
c) Membranes
d) Carbohydrates
14) Tiny compartments within the cells arecalled
a) Organs
b) Fibers
c) Ligaments
d) Organelles
15) At macroscopic level,________ and ______ of body form discretefunctional compartments.
a) Tissues,organs
b) Mitochondria,ER
c) Cell membranes, cytosol
d) Both b & c
16) Mechanical properties of cell and organs contain
a) Strength
b) Elasticity
c) Fluidity
d) All above
17) The physical properties of cells and tissues areoften directresultof their ______.
a) Morphology
b) Anatomy
c) Heredity
d) Both a & c
18) Cells and tissuethat influencefunction have
a) Complianceand elastance
b) Strength and flexibility
c) Fluidity
d) All above
19) Compliancemeans
a) Ability to do work
b) Ability to stretch
c) Ability to return to original state
d) Ability to become strong
20) Elastancestands for

4. Animal Physiology
a) Ability to do work
b) Ability to stretch
c) Ability to return to original state
d) Ability to become strong
21) Physiological,biochemical and anatomical changethattypically occur in gradual manner over generation
is called
a) Mutation
b) Adaptation
c) Regulation
d) Acclimation
22) Adaptation is not
a) Heritable
b) Reversible
c) Non-reversible
d) Involvein evolution
23) In adaptation,physiology of an animal is well matched with
a) The environment
b) The other animals
c) The ancestors
d) None of them
24) Evolution by ____________ is the explanation of the process of adaptation.
a) Inheritanceof acquired characters
b) Use and disuse
c) Natural selection
d) Both a & c
25) Adaptation is changein ___________ that resultchange in ________.
a) Phenotype, genotype
b) Genotype, phenotype
c) Cells,organs
d) Organs,organism
26) Adaptation is caused by _______ in _______ and transferred to ___________.
a) Enzymes, proteins,next generations
b) Chemicals,germlineDNA, offspring
c) Mutations,proteins, ancestors
d) Mutations,germline cells,next generation
27) _________ is physiological,biochemical and anatomic changewithin an individual animal duringits life
time that resultfrom animal chronicexposure,in its habitatto naturally occurringenvironmental
conditions.
a) Adaptation
b) Acclimatization
c) Acclimation
d) Regulation
28) _______ is the same process when the changes are induced artificially in lab or in wild habitatby
researchers.
a) Adaptation
b) Acclimatization
c) Acclimation
d) Regulation
29) Change in internal condition with changein external environment or conditions is called

5. Animal Physiology
a) Conformity
b) Regulation
c) Homeostasis
d) Feedback mechanism
30) The maintenance of internal conditions despitechangein external environmental conditions iscalled
a) Conformity
b) Regulation
c) Adaptation
d) Feedback mechanism
31) Consistency of internal environment is known as
a) Conformity
b) Regulation
c) Adaptation
d) Homeostasis
32) The concept of homeostasis was recognized by French primer _______.
a) J. Watson
b) ClaudeBernard
c) Darwin
d) F. Crick
33) Aquatic animals face_________ and _______than their body.
a) Concentrated, salty water
b) Concentrated, salty soil
c) Diluted, salty water
d) Diluted, salty soil
34) Terrestrial animalsface_______ and ______ temperature.
a) Cool, cool
b) Hot, intermediate
c) Cool, intermediate
d) Hot, cool
35) _________ is controlled by feedback control system.
a) Homeostasis
b) Conformity
c) Regulation
d) Adaptation
36) Feedback system can be
a) Negative
b) Positive
c) Electropositive
d) Both a & b
37) In negative feedback mechanism, a hormone after produced in specific amount________ its own
production.
a) Increases
b) Decreases
c) Compensates
d) Enhances
38) In positivefeedback mechanism, a hormone after produced in specific amount_________ its own
production.
a) Reduces
b) Enhances

6. Animal Physiology
c) Decreases
d) Compensates
39) Example of positivefeedback mechanismis
a) Insulin
b) Oxytocin
c) FSH
d) Glucagon
40) Example of negative feedback mechanismis
a) Insulin
b) Oxytocin
c) Reflex arc
d) None of them
41) In homeostasis,_______ energy is consumed.
a) Less
b) More
c) Moderate
d) No
42) In homeostasis,cells areprovided with ________ conditions for proper functioning.
a) Harsh
b) Normal
c) Same
d) Reduced
43) _________ are conformer for temperature but regulator for chlorides.
a) Humans
b) Lung fish
c) Snakes
d) Salmon

7. Animal Physiology
Membrane Potential
1) Different charges present across the membrane is called
a) Electric potential
b) Action potential
c) Chemical potential
d) Membrane potential
2) Difference in relativenumber of ______ and _____ across the membrane causemembrane potential.
a) Chemicals,compounds
b) Cations,anions
c) Liquid,gases
d) All above
3) Separated charges create ability to do
a) Fire
b) Block
c) Work
d) Resist
4) MP is measured in
a) Millivolts
b) Megavolts
c) Microvolts
d) Nanovolts
5) All livingcellshave_______ and are potentially polarized.
a) Organs
b) Compounds
c) MP
d) Fluid
6) MP is caused by the unequal distribution of
a) Larger ions
b) Smaller ions
c) Key ions
d) Electronegative ions
7) The presence of more negative ions insidethe cell whilemore positiveoutsidethe cell is called
a) Action potential
b) Graded potential
c) Resting membrane potential
d) Depolarization
8) The cells haveability to produce rapid,transientchanges in their membrane potential when excited which
serves as electric signalsarecalled
a) Membrane bounded cell
b) Excited cells
c) Polarized cells
d) Non-polarized
9) Example of excited cells are
a) Nerve cells
b) Musclecells
c) Cardiac cells
d) All above
10) In body, electric charges arecarried by

8. Animal Physiology
a) Atoms
b) Ions
c) Molecules
d) Compounds
11) Ions responsiblefor generation and maintenance of RMP are
a) Na+, Rb+ and Ca+
b) Xe, Rn, Na+
c) Na+, K+ and anions
d) All above
12) Unequal distribution of charges acrossthemembrane is due to its
a) Selective permeability
b) Fluidity
c) Rigidity
d) None of them
13) Concentration of Na+ in extracellular is___,intracellular is____ and their relativepermeability is ___
respectively.
a) 5, 150, 50-75
b) 150, 15,1
c) 0, 65, 0
d) 150, 15,50-75
14) Concentration of K+ in extracellular is___,intracellularis ____ and their relativepermeability is ___
respectively.
a) 5, 150, 50-75
b) 150, 15,1
c) 0, 65, 0
d) 150, 15,50-75
15) Concentration of anions in extracellular is___,intracellular is____ and their relativepermeability is ___
respectively.
a) 5, 150, 50-75
b) 150, 15,1
c) 0, 65, 0
d) 150, 15, 50-75
16) The resting membrane potential maintain by
a) Na+ channels
b) K+ channels
c) Na+-K+ pump
d) Leak channels
17) Sincethe plasma membrane is impermeable to____ due to their larger sizes,so they arepresent inside
the cell.
a) Anions
b) Cations
c) Na+ ions
d) K+ ions
18) Plasma membrane is more permeable to ____ because PM has got more leak channels for it.
a) Na+
b) K+
c) Cl-
d) All above
19) Resting membrane potential for cells generally rangefrom___ to ____ mVs.

9. Animal Physiology
a) -10, -100
b) -20, -200
c) +10, +100
d) +20, +200
20) RMP for skeletal muscleis
a) -70 mVs
b) -80 mVs
c) -90 mVs
d) -120 mVs
21) RMP for smooth muscles is
a) -70 mVs
b) -60 mVs
c) -50 mVs
d) -55-60 mVs
22) RMP for cardiac muscleis
a) -75 to -80 mVs
b) -85 to -90 mVs
c) -65 to -75 mVs
d) -55 to -65 mVs
23) RMP for nerve cells is
a) -60 mVs
b) -70 mVs
c) -80 mVs
d) -90 mVs
24) MP directly generated by Na-K pump is
a) 10%
b) 20%
c) 30%
d) 40%
25) MP caused by the passivediffusion of Na and K is
a) 90%
b) 80%
c) 70%
d) 60%
26) MP is changed due to unequal transportof
a) Positiveions
b) Negative ions
c) Larger ions
d) Complex ions
27) Na-K pump moves out ____ ions of K+ and ___ ions of Na+ insidethe cell.
a) 3, 4
b) 3, 2
c) 2, 3
d) 4, 3
28) Na-K pump causes negativity of ____ on inside.
a) -2 mVs
b) -3 mVs
c) -4 mVs
d) -5 mVs

10. Animal Physiology
29) The more negative chargeinsidethe is caused by more and larger sizes of anions and create the
a) Dynamic equilibrium
b) Donnean equilibrium
c) Static equilibrium
d) Both a & c
30) Excitation and fluctuation in membrane potential generate _____ in nerve cells and _______ in muscle
cells.
a) Current, voltage
b) Voltage, impulse
c) Nerve impulse,contraction
d) Contraction,nerve impulse
31) Changes in MP are in responseto a triggering agent or _____.
a) Factor
b) Stimuli
c) Effector
d) Pressure
32) The stimulus can be
a) Electrical,hormonal
b) Thermal, electromagnetic receptor
c) Chemical,sound
d) All above
33) A stimulus which is to weak to produce a response is called
a) Threshold stimulus
b) Sub-threshold stimulus
c) Non-threshold stimulus
d) Ultra-threshold stimulus
34) Minimum strength of stimulus thatcan produce excitation is called
a) Threshold stimulus
b) Sub-threshold stimulus
c) Non-threshold stimulus
d) Ultra-threshold stimulus
35) Propagation of action potential is always ____from the point of origin.
a) Starts
b) Away
c) Stop
d) End
36) MP can be
a) Action potential
b) Graded potential
c) Degraded potential
d) Both a & b
37) Graded potential is for _______ distance.
a) Long
b) Short
c) Intermediate
d) All above
38) Action potentials arefor ________ distance.
a) Long
b) Short

11. Animal Physiology
c) Intermediate
d) Both a & b
39) Action potential is caused by
a) Na+ gated channels
b) K+ gated channels
c) Na-K pump
d) Both a & b
40) Action potential is caused by
a) Depolarization
b) Hyperpolarization
c) Repolarization
d) All above
41) The movement of negative ions insideand positiveions outsidethe cell is called
a) Depolarization
b) Hyperpolarization
c) Repolarization
d) Refractory period
42) The rebuildingof positivechargeoutside is called
a) Depolarization
b) Repolarization
c) Hyperpolarization
d) Refractory period
43) The state in which more negative charge is developed insidethe membrane is called
a) Depolarization
b) Repolarization
c) Hyperpolarization
d) Refractory period
44) The principlethatan axon will “fire” at full power or not at all is called
a) Distribution law
b) All-or-nonelaw
c) Thomson law
d) Kramer law