in humans only
temp increases(thermoreceptors)------feedback--------->hypothalamus(control centre)--------negative feedback---------------------------->sweat glands(afffector)(secret sweat)---------.temp decreases(back to set value approx 37C)
action potential is gay!
its simple its when the node of ranvier becomes permiable to NA+(sodium ions) and so this chemical enters the nside and becomes rapidaly positive relative to the outside. this is action potential and this allows the nerve impulse to pass through.
for cataracts the existing technology called 'phakoemulsifier. its where the lens is melted and sucked out and a plastic lens is inserted into the eye.
AN animal- so u use 1 animal and find out how it communicates to other memebrs of its species for socialising, mating, food and warning for danger, and scare of predators. use a bird.
why u ask...
ALL CATARTS INVOLVE THE CLUMPING OF OXIDESED PROTEINS(CRYTALLINS) IN THE LENS.
CAUSES
1)Insufficent nutritients in the lens fibres due the increased density of the fibres. The folded protiens(crystallin) that make up the lens then become oxidised. They clump together forming the...
2 animals:
-Cicada
-Male Frogs
CICADA
-Produces sound through a 'tympanal organ' (thin region)located in the exoskeleton called a cuticular membrane.
-The cicada has more than a thousand tympanal organs used for both making nad detecting sound. Sound is made by the vibration of air through the...
Natural Slection is somthing close to the survival of the fittest, whereas the most well-dapted and the stronguest survive and pass on their genes/characteristics to the next generation.