Online College Courses for Credit

The Muscular System: Unit 5

The Muscular System: Unit 5

Author: Nate Holz

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

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

314 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


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 Class Log...

  1. Wednesday (11/2): Notes - Part 1 on the microscopic anatomy of muscle. We watched Hank Green and his video on muscle cells (see below), and worked on 2 hand-outs; 5-1.01 (Intro to muscle cells), & 5-1.02 (Sarcomere Coloring/Label), and received the check list of all the human muscles we need to learn. Also watched two episodes of the "Human Body-Pushing the Limits" on strength, and several video clips on muscles (see Sophia)
  2. Friday (11/4): Notes - Part 2, "Muscle Contraction." Worked on four handouts: 5-1.03, 1.04, 1.041 and 1.05. We also watched the animation on the sliding filament theory of muscle contraction. We took our first look at the muscles of the head & neck
  3. Monday (11/7): Used the check list and checked off muscles of the shoulders and chest (used my iphone and the app called Visible Body Atlas.) Did the muscle fatigue lab, got the first cross word puzzle, and The Human Muscle Coloring page, and the study guide on muscle contraction for Wednesday's 50 point quiz. We also had a push-up contest. Finally, we watched crash course part 2 on muscles.
  4. Wednesday (11/9): Sad day after election day...Notes: "Muscles & Exercise." Went over the muscle check list and added all the muscle on the list. Watched an episode of "The Human Face" (except 6th period that watched Clinton's speech.) Handed out "Muscle Activity 1."
  5. Monday (11/14): A bunch of hand outs today - muscle labeling stuff. (5-2.03) handles two of the handouts (muscles to label both front and back.) (5-2.04) is a single hand out where you have a side view of the body to label. There is one more diagram but I can't find it in my files to put it on 4 total pages today.
  6. Wednesday (11/16): Final notes on the muscular system called "Muscle Movements." Two hand-outs; (9-Lab) called "Muscles of the Back & Legs," and our 2nd cross word puzzle (9a) called "Human Muscle Cross-Word." Watched the first video on "The Body in Numbers." The final tests on this system will be the Wednesday after Thanksgiving break.
  7. Friday (11/18): Kahoot game on muscles. 2nd and 4th period then watched a "Bones" episode, while 6th period choose to play a few games at the senior tables.
  8. Monday (11/28): Went over the cover sheet (you can find it here on Sophia) and talked about the two tests coming next class period (Wed.) Did hand out a final hand out called Muscle Anatomy/Contraction Guide - essentially a review sheet for Wednesday's tests.
  9. Wednesday (11/30): Had the Lab Test on Muscles as well as the written test on muscles. We also picked our groups for the integumentary system coming up - this ends the unit on the muscles and go over to Unit 5.5 on the integumentary system.

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

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

Muscle Contraction Process

muscle contraction animation,muscle contraction steps,muscle contraction animation actin and myosin,muscle contraction overview animation,muscle contraction and relaxation process,muscle contraction simplified,muscle contraction action potential,muscle contraction anatomy and physiology,muscle contraction cycle,muscle contraction calcium,how does muscle contraction work,muscle contraction explained,muscle contraction sliding filament theory,Muscle

Source: Microbiotic

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

Human Muscles

Part 1 consists of the muscles of the head and neck

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:

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:

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