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LU11: MUSCLE (MODES OF LOCOMOTIONS (Diverse modes of locomotion (ON LAND-…
LU11: MUSCLE
MODES OF LOCOMOTIONS
Movements ( hallmark of animals) enable to:
Foraging for food
Escape from danger
Finding mates
Ex: Sessile animals (Sponge & Cnidarian) need to move their tentacle to capture prey/beating cilia to generate water current for respiration & filtering food particles
Diverse modes of locomotion
ON LAND- Crawl/walk/run/hop/climb
IN WATER-swim/jet/propulsion
IN AIR- Active flight/gliding
Locomotion require energy, to overcome fiction and gravity
Energetic cost of transport is different
CHALLENGES FOR LOCOMOTION
Advantage
Water provide buoyancy for animal,reducing energy to overcome gravity
Disadvantage
Water is denser then air , thus animals need more energy to overcome friction
Adaption
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SWIMMING
ADAPTATION: Aquatic animals have sleek,fulsiform (torpedo-like) shapes to increase their hydrodynamic
MECHANISMS OF MOVEMENT
TYPE OF MUSCLE & MUSCLE STRUCTURE
MUSCLE CONTRACTION AND STIMULATION