Match each item in Column I with one item in Column II and choose your answer from the codes given below:

Column I Column II
I. Influx of sodium 1. Original establishment of RMP
II. Efflux of potassium 2. Repolarization
III. Na+/K+ pump 3. Depolarization
IV. Ca++ 4. Plateau in cardiac muscles

Codes :

I II III IV
1. 3 2 4 1
2. 2 1 4 3
3. 2 1 3 4
4. 3 2 1 4

Subtopic:  Muscle Contraction: Other Considerations |
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Which of the following joints would allow no movement?

(1) Fibrous joint

(2) Cartilaginous joint

(3) Synovial joint

(4) Ball and socket joint

Subtopic:  Fibrous & Catilaginous Joints |
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Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation.

(1) X = 12, Y = 7           True ribs are attached, dorsally to 

                                      vertebral column and ventrally to

                                      the sternum.

(2) X = 12, Y = 5           True ribs are attached dorsally to

                                      vertebral column and sternum on

                                      the two ends.

(3) X = 24, Y = 7           True ribs are dorsally attached to

                                      vertebral column, but are free on

                                      ventral side.

(4) X = 24, Y = 12         True ribs are dorsally attached to 

                                      vertebral column, but are free on 

                                      ventral side.

 

Subtopic:  Sternum & Ribs |
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The pivot joint between atlas and axis is a type of

(1) fibrous joint                 

(2) cartilaginous joint

(3) synovial joint               

(4) saddle joint

Subtopic:  Synovial Joint |
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Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

(1)  Calcium              

(2)  Magnesium

(3)  Sodium              

(4)  Potassium.

Subtopic:  Sliding Filament Theory |
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Lack of relaxation between successive stimuli in sustained muscle contraction is known as 

(1) fatigue   

(2) tetanus   

(3) tonus   

(4) spasm

Subtopic:  Muscle Contraction: Other Considerations |
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Which of the following is not a function of the skeletal system?

1. Production of erythrocytes

2. Storage of minerals

3. Production of body heat

4. Locomotion

Subtopic:  Muscle Contraction: Other Considerations |
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Sliding filament theory can be best explained as

1. when myofilaments slide pass each other actin filaments shorten while myosin

filament do not shorten

2. actin and myosin filaments shorten and slide pass each other

3. actin and myosin filaments do not shorten but rather slide pass each other

4. when myofilament slide pass each other myosin filament shorten while actin filaments

do not shorten

Subtopic:  Sliding Filament Theory |
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Select the correct matching of the type of the joint with the example in human skeletal

system

Types of joint                                     Example

1.  Cartilaginous joint                   Between frontal and parietal

2.  Pivot joint                               Between third and fourth Cervical vertebrae

3. Hinge joint                               Between humerus and pectoral girdle

4. Gliding joint                             Between carpals 

Subtopic:  Synovial Joint |
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The characteristics and an example of a synovial joint in humans is 

Characteristics Examples
1. Fluid cartilage between two bones, limited movements Knee joints
2. Fluid filled between two joints, provides cushion Skull bones
3. Fluid filled synovial cavity between two bones Joint between atlas and axis
4. Lymph filled between two bones, limited movement Gliding joint between carpals
Subtopic:  Synovial Joint |
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