BIOL 101 Lecture Notes - Lecture 14: Hydrolysis, Multinucleate, Relaxed Muscle
13 Jan 2016
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Very abundant (10^8 individuals alive at any given time) Adults collect air under wings & use this to breathe underwater. Worker bees dance to communicate location of new food source. Covers all external surfaces, digestive tract & tracheae. Opportunity to change morphology between larval & mating) locomotion adult stages. Continuous growth in size if not possible. Mass grows continuously, but size changes in stepwise. Clams do not experience moulting invents fashion. Skeletal muscles: need a resistor act against (i. e. , a skeleton, are often found in antagonistic pairs. Muscles can only pull, not push (e. g. , biceps/triceps) Muscle fiber: multinucleate cell; contains many myofibrils. Motor neuron neuromuscular junction muscle fiber. Synapse between motor neuron & muscle fibre. A neuron at rest is characterized by: Higher concentrations of na+ outside of the neuron. Higher concentrations of k+ inside of the neuron. At low ca2+ myosin heads can"t bind to actin filaments. Tropomyosin & troponin block myosin binding sites on actin expose.
