CSCS Chapter 1 | Muscle Structure and Function (with Practice Questions)
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- เผยแพร่เมื่อ 20 ต.ค. 2024
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NSCA CSCS Muscle Physiology Review:
Action Potential Travels Down Motor Neuron:
The process begins with an action potential, an electrical signal, traveling down the motor neuron towards the neuromuscular junction.
Acetylcholine (ACh) Released into Sarcolemma:
Upon reaching the neuromuscular junction, the action potential triggers the release of acetylcholine (ACh) from vesicles in the motor neuron into the synaptic cleft.
Action Potential on Sarcolemma:
ACh binds to receptors on the sarcolemma (muscle cell membrane), leading to depolarization and the generation of an action potential along the sarcolemma.
Sodium Ions (Na+) Rush into Muscle Cell:
The action potential propagates along the sarcolemma and into the T-tubules, triggering the release of calcium ions (Ca2+) from the sarcoplasmic reticulum (SR).
Sodium ions (Na+) also enter the muscle cell, further depolarizing it.
Calcium (Ca2+)
The depolarization of the T-tubules signals the sarcoplasmic reticulum (SR) to release stored calcium ions (Ca2+) into the sarcoplasm (muscle cell cytoplasm).
Myosin Heads Attach to Actin:
The increased calcium concentration in the sarcoplasm allows the myosin-binding sites on the actin filaments to be exposed.
Myosin heads attach to these binding sites, forming cross-bridges.
Muscle Contracts:
The cross-bridges undergo a series of conformational changes, pulling the actin filaments towards the center of the sarcomere.
This sliding filament mechanism results in muscle contraction, generating force and shortening of the muscle fibers.
This sequence of events, known as excitation-contraction coupling, is fundamental to the contraction of skeletal muscle and is a critical aspect of understanding neuromuscular physiology.
To prepare for the NSCA CSCS (Certified Strength and Conditioning Specialist) exam, it's crucial to have a solid understanding of muscle physiology, structure, and function from the NSCA CSCS Chapter 1 of the Essentials of Strength Training and Conditioning textbook. (The CSCS Book)
I recommend starting with chapter 1 of the CSCS Book if you're an exercise science student, personal trainer, strength coach, or sports physical therapist studying for the NSCA CSCS Exam.
Disclaimers:
Information contained in this video or otherwise provided by The Movement System is for educational purposes only, and does not substitute professional medical advice or consultations with healthcare professionals. Always consult with a medical professional before making changes to your exercise routine.
This video does not have any affiliation with, or any recognition, sponsorship, or endorsement by, the NSCA. CSCS® and Certified Strength and Conditioning Specialist® are registered trademarks of the National Strength and Conditioning Association.
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Omg thank you so much, I just started studying and this chapter was so much information with Micro and Macro Structure
Currently working on my NSCA CPT. I love your videos! Keep it up!
Join our Free CSCS Study Group: facebook.com/groups/2415992685342170
Used your videos to review for my Mblex exam! Thanks for great content!
excellent explanation... thanks!
Hey thank you for these amazing information!! When can we expect Chapter 2 ?
If you make a playlist or series for the CPT that would be very helpful for me and I’m sure others
Hi,
I like your contents its very useful
I'm trying to study CSCS by own can u suggest me which books and study materials that i need to refer