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How is heart contraction triggered?
Heart contraction is independent from neuronal stimulus (although it can be modulated by the autonomous nervous system). In the heart there are pacemaker cells that trigger by themselves the action potentials that start the muscle contraction. These cells are concentrated at two special points of the heart: the sinoatrial node (SA node) situated in the superior portion of the right atrium and the atrioventricular node (AV node) situated near the interatrial septum.
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how does autophagy help in converting a tadpole larva into an adult amphibian
Give a specific example of homeostasis An owl handles its body temperature by burning fuel to make body heat and by fluffing up its feathers to trap an insulating layer of air
Q. Important conditions for malabsorption syndrome? Let us now discuss a few important conditions grouped collectively under the term of malabsorption syndrome. These are:
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