This is a picture of the human arm using a flour and water mixture. The red on the picture is the biceps brachii contracted and the triceps brachii relaxed. It also shows the humerus, radius, ulna, and the hinge joint.
This is a picture of the arm with it's muscles which is the red stuff. I used a mixture of flour and water to make the bones of the arm and red cloth to make the muscles.
Resting potential occurs when a neuron is not conducting a nerve impulse. More Na+ outside the axon and more K+ inside the axon causes polarization. To make this I used shoelaces, round cereals, and a marker.
Action potential ends repolarization occurs when K+ gates open and K+ moves to outside the axon. To make this I used shoelaces, some round cereals, and a marker.
Action potential begins depolarization occurs when Na+ gates open and Na+ moves to inside the axon. To make this I used shoelaces, some little round cereals, and a marker.
When an axon is unmyelinated the action potential at one locale stimulates an adjacent part of the axon's membrane to produce an action potential. In myelinated axons an action potential at one Ranvier node causes an action potential at the next node. I used shoelaces and staples to make this part.
This is a picture of a motor neuron. A motor neuron has a long axon covered by a myelin sheath that takes nerve impulses from the CNS to an effector. These parts are cell body, axon, node of Ranvier, axon terminal, and dendrite. To make this I used a lid, some beads, and shoelace.
From this lab I learned how muscles and bones and tendons and ligments all have to work together to make things bend and have movement. It is not just one thing that works. Muscles and bones are very strong and work together well and we could not function without them.
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