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Locomotion and Movement

Multiple Choice Questions

51.

One animal that does not perform locomotion is

Sycon
Nereis
Sepia
Euglena

52.

During strenuous excercise, glucose is converted into

glycogen
pyruvic acid
starch
lactic acid

53.

Which of the following is a transparent tissue?

Tendon
Fibrous cartilage
Hyaline cartilage
All of these

54.

In rabbit, end of a long bone is connected in another by

tendon
ligaments
muscle
cartilage

55.
Which of the following is important for muscle contraction and nerve impulse transmission?

Ca²⁺ ions

Mg²⁺ ions

Both (a) and (b)

Fe²⁺ ions

Ca²⁺ ions

Ca²⁺ ions are essential for muscle contraction, neutro- muscular functions and nerve impulse transmission. During its transmission, impulse arrives at a synaptic knob, Ca²⁺ ions diffuse into the knobs from surrounding tissue fluid.

It basically triggers a process in which numerous synaptic vesicles fuse with the membrane of the knob and the areas of fusion break down, releasing the contents of vesicles into the fluid of synaptic clefts.