Do Now. What happened one year ago today? During the height of the Boston Marathon, two homemade bombs were planted. Each was a pressure cooker filled with nails and screws. To cause maximum harm to people.
PowerPoint Slideshow about ' Do Now' - akamu
An Image/Link below is provided (as is) to download presentation
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
A motor neuron (where the impulse to contract travels) meets with a skeletal muscle at a junction (synapse) called a neurotransmitter junction.
When stimulated, the axon end or terminals release acetylcholine and cross the synapse to produce an impulse. This will cause the release of calcium in the muscle fibers. They regulate proteins to allow myosin cross bridges to bind with actin.
Red muscles are aka slow twitch muscles which means they contain many mitochondria. They are deep red due to the supply of oxygen rich blood.
These type of muscles are designed for endurance (long lasting activities) such as marathons.
White fibers are fast twitch muscles. These white fibers can create a great deal of force but tire quickly (compared to red or dark muscles). Fewer mitochondria are found in White Fibers. A sprinter would want to have more white (Fast Twitch) and a marathoner would want slow twitch