Ans8.1)
At the motor end plate, the action potential causes the release of packets or quanta of acetylcholine into the synaptic clefts on the surface of the muscle fiber.
Acetylcholine causes the electrical resting potential under the motor end plate to change, and this then initiates an action potential which passes in both directions along the surface of the muscle fiber.
At the opening of each transverse tubule onto the muscle fiber surface, the action potential spreads inside the muscle fiber.
At each point where a transverse tubule touches part of the sarcoplasmic reticulum, it causes the sarcoplasmic reticulum to release Ca++ ions.
The calcium ions result in movement of troponin and tropomyosin on their thin filaments, and this enables the myosin molecule heads to “grab and swivel” their way along the thin filament. This is the driving force of muscle contraction
8.1 In your own words, describe the main events occurring between the arrival of an action...
In your own words, briefly define an action potential and a nerve impulse.Describe the following events in terms of ion movement and millivoltage: resting potential, depolarization, and threshold.
True or False: The striations in skeletal muscle are formed by the arrangement of thick and thin filaments. 2. True or False: In skeletal muscle cells, the sarcoplasmic reticulum is continuous with the sarcolemma. 3. The interval between two Z lines is called a ________________. 4. At a neuromuscular junction, the space between the plasma membrane of the synaptic terminal and the motor end plate is the __________________. 5. An action potential (electric impulse) is transferred from a...
Neuron Signaling and Muscle Contraction 1) “Dissect” the various parts of an action potential by describing the status (active or nonactive) of the voltage-gated sodium channel, voltage-gated potassium channel, sodium/potassium pump, and overall voltage and/ or voltage range (in millivolts, or mV) for each of the following. A) Resting membrane (prior to the initiation of an action potential) B) just before threshold to just after threshold (Depolarization) C) Rising phase of the action potential D) Falling phase of the action...
Describe the main characteristics of Rococo painting and architecture in your own words. Give an example of specific artists and works of art to illustrate these characteristics
In your own words, describe the differences between PPOs, POSs and HMOs. Use complete sentences. If you need assistance, use only the textbook as a reference. No reference is needed since this will be your only source.
3. A motor unit is said to be all or none. In your own words, explain how this is different that whole muscle contraction. Explain the difference between a large and small motor unit examples of each (not the ones from the reading or PowerPoint) (2pts) 4. Unfortunately, we cannot change the type of muscle fibers we are born with, but we can still train all of the fibers we do havet Since most of us aren't superstar athletes, we...
Minimum of 250 words In your own words describe the benefits of weight training.
1) In your own words explain the concept of "educare"? 2) describe the main principals caregiving strategies and benefits for children, families and educarers?
In 250 words, describe the main differences between Trend Analysis and Predictive Analysis.
Q1: In your own words, describe what you believe to be the differences between a standing wave in a string and a sound wave. Q2: In your own words, describe what you believe to be the similarities between a standing wave in a string and a sound wave. Q3: If a sound wave travels down a tube with a closed end (like a bottle) what happens to the wave when it gets to the closed end? 04: Why do you...