The human skull has 22 bones with ..................cranial bones and ............................ facial bones

  • 10,12                           

  • 14,8

  • 12,10                           

  • 8,14

Which of the following has ATPase activity?

  • Actin                           

  • Tropomyosin

  • Head of myosin             

  •  Troponin

The ATPase activity of the myosin head is dependent on:

  • Magnesium ions

  • Manganese ions

  • Calcium ions

  • Ferric ions

Skeletal muscle bundles [fascicles] are held together by a common connective tissue layer called:

  • Perimysium

  • Endomysium

  • Fascia

  • Aponeurosis

The neurotransmitter released at the neuromuscular junction is:

  • Adrenaline

  • Nor-adrenaline

  • Dopamine

  • Acetylcholine

During muscle contraction, the length of all the following gets reduced except:

  • H-Zone

  • A-Band

  • I-Band

  • Sacromere

What is true about the white muscle fibers?

  • Myoglobin content is high

  • They have a large number of mitochondria

  • They depend on anaerobic process for energy

  • They are adapted for slow sustained activities

The human ribs are termed as bicephalic because:

  • They have two articulations surfaces on their ventral end

  • They have two articulations surfaces on their dorsal end

  •   They have two articulations surfaces on their ventral end and two on dorsal end

  • They have two articulations surfaces on their ventral end and one on dorsal end

The clavicle articulated with the:

  • Xiphoid process of the sternum

  • Acromion of the scapula

  • Glenoid cavity of the scapula

  • Head of the humerus

Hypocalcemia may lead to:-

  • Kidney stones

  • Cholelithiasis
  • Stronger muscle contractions
  • Tetany

Identify the incorrectly matched pair:

      Joint                                             Type

    thumb and phalange

  • Proximal radio-ulnar joint                 Pivot

  • Joint between the carpals               Gliding

  • Joint between metacarpal of           Saddle

  • Humero-ulnar joint                         Hinge

The globular head of the myosin filament has active site/s for binding to:

 I. ATP

II. binding site for actin filament 

III. Calcium

  • Only I

  •  Only I and II

  •  Only II and III

  • I, II and III

Scapula is a large triangular flat bone situated in the dorsal part of the thorax between:

  • the second and fifth ribs

  •  the second and seventh ribs

  •  the third and sixth ribs

  •  the third and eighth ribs

The combination of a neuron and the muscle fiber it associates with is called a/an.

  • fascicle

  • motor end plate

  •  motor unit

  • myoneural junction

The upper ends of the forearm bones articulate with each other in a:

  • pivot joint

  • ellipsoid joint

  • saddle joint

  • hinge joint

Which of the following is a hinge point?

  • At the base of the first metacarpal

  • Intervertebral disc

  • Interphalageal

  • Between carpal bone

Consider the following statements:

I. A motor neuron along with the muscle fibres connected to it constitute a motor unit

II.The neurotransmitter released at the neuro-muscular junction is Acetylcholine.

III.Myosin head has ATPase activity

Which of the above statements are true?

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

The contractile protein of skeletal muscle involving ATPase activity is :

  • tropomyosin                 

  • myosin       

  •  α-actinin                     

  • troponin

Consider the following statements:

I. Myasthenia gravis is an autoimmune disorder affecting neuromuscular junction

II. Muscular dystrophy is a progressive degeneration of skeletal muscles mostly due to genetic disorder

III. Tetany is rapid spasms in muscle due to high Ca++ in body fluid.

Which of the above statements are true?

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Consider the following statements:

I. Proximal radioulnar joint is a type of ellipsoidal joint.

II. The first carpo-metacarpal joint is a saddle joint.

III. Gleno-humeral joint is a ball and socket joint.

Which of the above statements are true

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

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

Column I

Column II

I. Smooth muscle

II. Skeletal muscle

III. Cardiac muscle

1. Striated, voluntary

2. Non-Striated, involuntary

3. Striated, Involuntary

 

Codes

             I           II         III 

  •          1           2           3

  •          3           1           2

  •          2           1           3

  •          1           3           2

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

Column I

Column II

I. Acetabulum

II. Glenoid Cavity

III. Vertebrosternal ribs

IV. Vertebrochondral ribs

1. Pectoral girdie

2. Pelvic girdie

3. 7 pairs

4. 3 pairs

 

Codes

             I           II         III         IV

  •          1           2           3           4

  •          2           1           4           3

  •          2           1           3           4

  •          1           2           4           3

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

 
  • 1
  • 2
  • 3
  • 4

Which of the following joints would allow no movement?

  • Fibrous joint

  • Cartilaginous joint

  • Synovial joint

  • Ball and socket joint

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.

                                      vertebral column and ventrally to

                                      the sternum.

                                      vertebral column and sternum on

                                      the two ends.

                                      vertebral column, but are free on

                                      ventral side.

                                      vertebral column, but are free on 

                                      ventral side.

 

  • X = 12, Y = 7           True ribs are attached, dorsally to 

  • X = 12, Y = 5           True ribs are attached dorsally to

  • X = 24, Y = 7           True ribs are dorsally attached to

  • X = 24, Y = 12         True ribs are dorsally attached to 

The pivot joint between atlas and axis is a type of

  • fibrous joint                 

  • cartilaginous joint

  • synovial joint               

  • saddle joint

Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

  •  Calcium              

  •  Magnesium

  •  Sodium              

  •  Potassium.

Lack of relaxation between successive stimuli in sustained muscle contraction is known as 

  • fatigue   

  • tetanus   

  • tonus   

  • spasm

Which of the following is not a function of the skeletal system?

  • Production of erythrocytes

  • Storage of minerals

  • Production of body heat

  • Locomotion

Sliding filament theory can be best explained as

filament do not shorten

do not shorten

  • when myofilaments slide pass each other actin filaments shorten while myosin

  • actin and myosin filaments shorten and slide pass each other

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

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

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Practice Zoology Quiz Questions and Answers