You need to step up on a step to reach an object on a high shelf.
Instructions: (Part one) Trace the impulse, listing the steps in as much detail as possible, from which your brain sends the message to the appropriate muscles to step up one step. Specifically include the steps involved in transmitting the impulse from the neuron to the muscle fiber at the neuromuscular junction. Specify which muscles are pulling on which bones and what type of joints are involved. (Part two) Trace the impulse, listing the steps in as much detail as possible, from which your brain sends the message to the appropriate muscles to reach up above your head to the shelf. Include in this the steps involved in the actual muscle fiber contraction – sliding filament mechanism. Again, specify which muscles are pulling on which bones and what type of joints are involved.
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Trace the impulse, listing the steps in as much detail as possible, from which your brain sends the message to the appropriate muscles to step up one step.
Get an A+ Answer; 2000+ words; 100% Correct, help yourselves. I got an A Plus
Download the complete answer from following link
w w w . tinyurl . c o m/stepuponstep
Each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.
a nerve impulse travels along the neuron in the form of electrical and chemical signals.
Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle
action potential, which leads to muscle contraction.
Each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.
a nerve impulse travels along the neuron in the form of electrical and chemical signals.
Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle
The nerve impulse reaches the spine through the axon tip, where it then travels to the tensor fascia, then to the iliacus, to the hipbone to the patella to the fibula longus, to the soleus to tibialis anterior.
Part One: Stepping up on a step
1. The brain receives information from the eyes, which indicates the object on the high shelf that needs to be reached.
2. The visual cortex processes the information and sends a signal to the motor cortex.
3. The motor cortex initiates the impulse by sending an electrical signal called an action potential down a group of neurons known as motor neurons.
4. The action potential travels down the motor neurons towards the spinal cord.
5. In the spinal cord, the action potential is transmitted to the lower motor neurons that innervate the muscles responsible for stepping up on a step. These lower motor neurons are located in the ventral horn of the spinal cord.
6. From the spinal cord, the action potential travels along the lower motor neurons, which extend out of the spinal cord via the ventral root.
7. The action potential reaches the neuromuscular junction, which is the connection between the motor neuron and the muscle fiber.
8. At the neuromuscular junction, the action potential triggers the release of a neurotransmitter called acetylcholine.
9. Acetylcholine binds to receptors on the muscle fiber, causing a chemical change that leads to the contraction of the muscle fiber.
10. The muscle fiber contracts, pulling on the bones and causing the joint involved to move. In the case of stepping up on a step, the muscles involved are typically the quadriceps in the front of the thigh, which pull on the tibia bone through the patellar tendon. The knee joint is the primary joint involved in stepping up on a step.
Part Two: Reaching up to the shelf
1. The brain receives information from the eyes, indicating the location of the object on the high shelf.
2. The visual cortex processes the information and sends a signal to the motor cortex.
3. The motor cortex initiates the impulse by sending an action potential down the motor neurons.
4. The action potential travels down the motor neurons towards the spinal cord.
5. In the spinal cord, the action potential is transmitted to the lower motor neurons that innervate the muscles responsible for reaching up to the shelf. These lower motor neurons are located in the ventral horn of the spinal cord.
6. From the spinal cord, the action potential travels along the lower motor neurons, which extend out of the spinal cord via the ventral root.
7. The action potential reaches the neuromuscular junction, where it triggers the release of acetylcholine.
8. Acetylcholine binds to receptors on the muscle fiber, leading to a chemical change that allows the muscle fiber to contract.
9. The contraction of the muscle fiber causes a pulling action on the bones, specifically involving the muscles of the arm and shoulder. Muscles like the deltoids, biceps, and triceps are typically involved in reaching up above the head. The joint involved in reaching up is the shoulder joint, which allows for movement in multiple directions.
10. The coordinated contraction of the appropriate muscles allows for the arm to extend and reach up towards the shelf, enabling the object to be retrieved.