UH KIN 3304 - Muscle Units, Muscle Tone, and Muscle Hypertrophy (3 pages)

Previewing page 1 of 3 page document View the full content.
View Full Document

Muscle Units, Muscle Tone, and Muscle Hypertrophy



Previewing page 1 of actual document.

View the full content.
View Full Document
View Full Document

Muscle Units, Muscle Tone, and Muscle Hypertrophy

323 views

The 5th lecture regarding muscle units, muscle tone, and muscle hypertrophy.


Lecture number:
6
Pages:
3
Type:
Lecture Note
School:
University of Houston
Course:
Kin 3304 - Human Structure & Physical Performance
Edition:
1
Documents in this Packet

Unformatted text preview:

KIN 3304 1nd Edition Lecture 6 Outline of Last Lecture I Skeletal Muscle II Neuromuscular Synapse NMJ III Transverse T Tubules IV Myofibrils and Myofilaments V Organization of Sarcomere VI Tropomyosin and Troponin VII Thick Filament VIII Titin IX Sliding Filament Theory SFT X Electrical Events at Sarcolemma Surface Cause Muscle Action XI End of Cycle Outline of Current Lecture I Death in Circulation II III Motor Units Skeletal Muscle Contracts when its MR are stimulated IV V All of None Principle Rotating MU Recruitment Lessens Fatigue in Muscles VI Muscle Tone VII Muscle Hypertrophy These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute VIII How does Hypertrophy Occur Current Lecture I KNOW STEPS IN MUSCLE CONTRACTION AND MUSCLE RELAXATION Death a Death in Circulation i Muscles deprived of nutrients O2 b Muscle Fibers Depleted of ATP i SR unable to remove Ca2 ii Ca2 ions diffuse in sarcoplasm 1 Causes sustained muscle action c No ATP cross bridges cant detach from active sites i Muscle stays in contracted position d 15 25 hours later enzymes break down Myofilaments II Motor Units MU a All of the muscle fibers controlled by a single motor neuron b Control from 1 to 1 000 s of fibers c Stimulate MU i Motor action d Figure 9 12 The Arrangement of MU in Skeletal Muscle III Skeletal Muscle Contracts when its MR are stimulated a Dependent upon 2 factors i Frequency of stimulation ii Number of MU involved b A single moment of contraction is called muscle twitch IV All of None Principle a Each fiber contracts completely or not at all b All muscle fibers in a MU contract at same time i Thus exerted force depends on of MU activated ii Precise control of movement controlled by varying number of motor units Rotating MU Recruitment Lessens Fatigue in Muscles a Muscle Fibers have a finite energy supply b During sustained exertion MU are activated on rotating basis c Some are at rest



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Muscle Units, Muscle Tone, and Muscle Hypertrophy and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Muscle Units, Muscle Tone, and Muscle Hypertrophy and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?