XI - CH - 20 - Locomotion & Movement - P1

Streaming of cytoplasm/cyclosis is seen in

• (A) Amoeba

• (B) Macrophages

• (C) Leukocytes

• (D) All

Cardiac/heart muscles are

• (A) Striated and involuntary

• (B) Not fatigued

• (C) Branched

• (D) All

The source of Ca+2 for the muscle is –

• (A) T-tubule

• (B) Sarcosome

• (C) Sarcolemma

• (D) Sarcoplasmic reticulum

The fascia surrounding a muscle is made up of

• (A) Cartilage

• (B) Collagenous connective tissues

• (C)Adipose tissue

• (D) Blood vessels

Contractile fibrils of muscles are called –

• (A) Neurofibrils

• (B) Collagen fibres

• (C) Myofibrils

• (D) Yellow fibres

Myofibrils show alternate dark and light bands in

• (A) Cardiac muscles

• (B) Smooth muscles

• (C) Striped muscles

• (D) a and c

Which is the smallest one?

• (A) Muscle fibre

• (B) Myofibril

• (C) Actin

• (D) Sarcomere

Z-line divides the myofibrils into –

• (A) Sarcomere

• (B) Sarcolemma

• (C) Sarcosome

• (D) Microtubules

Sarcomere is the area between

• (A) 2 H-zones

• (B) 2 Z-lines

• (C) 2 M-lines

• (D) 2A-bands

Dark bands (thick filaments) contain myosin and are called

• (A) A-bands or Isotropic band

• (B) A-bands or Anisotropic bands

• (C) I-bands or Isotropic bands

• (D) I-bands or Anisotropic bands