Light bands (thin filaments) contain actin and are called:

(1) A-bands or Isotropic band            

(2) A-bands or Anisotropic bands

(3) I-bands or Isotropic bands           

(4) I-bands or Anisotropic bands

Dark bands (thick filaments) contain myosin and are called:

(1) A-bands or Isotropic band            

(2) A-bands or Anisotropic bands

(3) I-bands or Isotropic bands           

(4) I-bands or Anisotropic bands

Choose the letter from the figure that most appropriately corresponds to the structure:

I.A-band       II. I-band           III.    Sarcomere         IV.     H-zone

V.Myosin       VI.Actin, Troponin, Tropomyosin             VII.   Z –line

(1) I - E, II - D, III - F, IV - G, V - B, VI- C, VII - A

(2) I - E, II - D, III - C, IV - G, V - B, VI - A, VII - F

(3) I - E, II - D, III - F, IV - G, V - C, VI - A, VII - B

(4) I - E, II - D, III - F, IV - A, V - B, VI - C, VII - G

Ca⁺² bind ________ in the skeletal muscles and leads to exposure of the binding site for ________ on the filament _______:

(1) Troponin, myosin, actin                

(2) Troponin, actin, relaxin

(3) Actin, myosin, troponin                

(4) Tropomysin, myosin, actin

Following is the figure of actin (thin) filaments. Identify A, B and C:

1. A - Tropomyosin, B - Troponin, C - F-actin

2. A - Troponin, B - Myosin, C - Tropomyosin

3. A - Troponin, B - Tropomyosin, C - Myosin

4. A - Troponin, B - Tropomyosin, C - F-actin

The above figure is related with myosin monomer (meromyosin). Identify A to C:

(1) A - head, B - cross arm, C - GTP binding sites

(2) A - head, B - cross arm, C - Ca⁺² binding sites

(3) A - head, B - cross arm, C - ATP binding sites

(4) A - cross arm, B - head, C - ATP binding sites

Put the following phrases in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction:

1. II, IV, I, VI, VII, III, V           

2. II, IV, VI, I, VII, III, V

3. I, II, III, IV, V, VI, VII             

4. VII, VI, V, IV, III, II, I

How many bones make up the human skeleton?

(1) 948                

(2) 96                            

(3) 796                

(4) 206

Number of bones in human axial skeleton is:

(1) 80                            

(2) 106                

(3) 206                

(4) None of these

Human skull is:

(1) Dicondylic       

(2) Monocondylic  

(3) Procoelous      

(4) Hetercoelous