The Muscular System: Unit 5

The Muscular System: Unit 5

Author: Bob Grove

The muscular system provides for movement of the body and its parts, maintains posture, generates heat, and stabilizes joints.

  • Define muscular system
  • Describe the microscopic structure of skeletal muscle, and explain the role of actin and myosin containing myofilaments
  • Describe how an action potential is initiated in a muscle cell
  • Describe the events of muscle cell contraction
  • Define graded response, tetanus, isotonic and isometric contractions, and muscle tone
  • Define oxygen deficit and muscle fatigue, and list possible causes of muscle fatigue
  • Define origin, insertion, prime mover, antagonist, synergist, and fixator as they relate to muscles
  • Name and locate the major muscles of the human body
  • Explain the importance of a nerve supply and exercise in keeping muscles healthy

This lesson is a series of videos and powerpoint lectures that covers the objectives of the unit; The Muscular System

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Muscle Unit Objectives

  • Overview of Muscles – defining the muscular system to knowing the types of muscles
  • Be able to describe the microscopic structure of skeletal muscle
  • Nerve-Muscle interaction – the neuromuscular junction
  • The Sliding Filament Theory of muscle contraction
  • Muscle Contractions and Exercise
  • Learning many human muscles

Unit 5 Assignments (The Muscular System)

Source: Bob Grove

Part 1 - The Muscular System

(Note - there is a 11 second delay before the video starts) A video cast of one of my (Prezi) lectures on the microscopic anatomy of skeletal muscle. The video starts with a short introduction on the types of muscles as well as the basic function of muscles. You can check out a ppt version of this below

Source: Bob Grove

Crash Course: Muscles Part 1

We're kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing in a process called the sliding filament model. Your skeletal muscles are constructed like a rope made of bundles of protein fibers, and that the smallest strands are your actin and myosin myofilaments. Its their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax.

Source: Crash Course - Hank Green

Make sure to check out the two videos directly below my video...

Hank provides a nice overview and the next video provides an excellent review of the complex parts of skeletal muscle

Myology - Skeletal Muscle (Structure) (Microscopic Anatomy of Muscle)

A nice 5 minute video that explains the microscopic anatomy of skeletal muscle tissue very well

Source: Armando Hasudungan

Part 1 - Microanatomy of Muscles

This ppt goes with my lecture video - it's pretty much my video in ppt format.

Source: Bob Grove

Part 2 - Muscle Physiology (How a Muscle Contracts)

This ppt looks at how a muscle contracts; from motor units to the sliding filament theory

Source: Bob Grove

Sliding Filament

sliding filament theory of muscle contraction - created by Sara Egner as part of UIC's biomedical visualization program

**Some of you have noticed that there is a mispronunciation in this animation. It's true. ATP stands for adenosine triphosphate, and ADP for adenosine diphosphate. Please don't be confused on my account.

Source: Sara Egner - UIC's Biomedical Visualization Program

Video Cast 1: The Muscles of the Head and Neck

Using the "Human Body Atlas - Visible Body" program, we look at the muscles that make up the head and neck.

Source: Human Anatomy Atlas: http://www.visiblebody.com/index.html

Video Cast 2: The Muscles of the Shoulder and Back

Using the "Human Body Atlas - Visible Body" program, we look at the muscles that make up the shoulder & back.

Source: Human Anatomy Atlas: http://www.visiblebody.com/index.html

Part 3 - Muscles and Exercise

My video cast looks at muscle fatigue and oxygen debt in working muscles. There is also a discussion of the two types of muscle contraction; isotonic and isometric. Muscle tone and a look at resistance training is also discussed.

Source: Bob Grove

Muscle and Exercise Powerpoint

This is the powerpoint version of my video cast...easier for some to glean the needed information than watching a video.

Source: Bob Grove

Muscle Movements

A look at the different movements associated with muscles. Also a look at terminology such as origin, insertion, etc...

Source: Bob Grove

Crash Course: Muscles Part 2

Hank calls in a friend to do his push ups for him today to explain how skeletal muscles work together to create and reverse movements. Hank and Claire also demonstrate the role size plays in motor units, the three phase cycle of muscle twitches, and how the strength and frequency of an impulse affects the strength and duration of a contraction. This episode also explains twitch summation, tetanus, and isotonic vs. isometric movements.

Source: Hank Green and Crash Course

ASAP Science: The Scientific Secret of Muscle Growth

Always thought provoking topics from ASAP Science...

Source: ASAP Science

Vsauce3: What if Superman Punched You?

Here's the video referenced by ASAP Science in their muscle video...

Source: Vsauce3

SciShow: Why Do Birds Have White & Dark Meat (and do we?)

Source: SciShow