https://padlet.com/nwal0290/u56h3wo63eap en-us 2018-10-25 12:34:53 UTC 2025-12-06 11:04:06 UTC hello@padlet.com nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/296893649 Tendon is a highly organized connective tissue joining muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.]]> 2018-10-25 12:38:02 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/296893649 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/296898828 The superficial fascia is a soft connective tissue that is located just below the skin. It wraps and connects the muscles, bones, nerves, and blood vessels of the body. Together, muscle and fascia make up what is called the myofascia system.]]> 2018-10-25 12:49:32 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/296898828 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/296902200

The muscular system creates movement

It protects the organs

The cardiac muscle pumps blood

Smooth muscle aids digestion

Smooth muscle ensures blood flow

]]> 2018-10-25 12:54:52 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/296902200 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/296905459 Muscle fatigue is the decline in ability of a muscle to generate force. Muscle fatigue can occur anywhere on the body. An initial sign of this condition is muscle weakness. Other symptoms associated with muscle fatigue include: soreness.]]> 2018-10-25 13:00:56 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/296905459 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/296907832 A muscle spasm is usually a sprain or a strain. It is an involuntary sustained cramping or tightening of the muscle fibers. Muscle related causes are the most common reason for back pain.]]> 2018-10-25 13:05:29 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/296907832 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297048396 Clonic spasms refer to alternating involuntary muscular contraction and relaxation in quick succession. Clonic seizures involve rhythmic twitching or jerking of one or several muscles. Clonic seizures could be caused by a brain tumor or a ruptured blood vessel in the brain. ]]> 2018-10-25 16:30:41 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297048396 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297051547  Tonic spasms are rigid muscle contractions that last a period of time. During the tonic phase a person initially stiffens and loses consciousness, causing them to fall to the ground.]]> 2018-10-25 16:35:46 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297051547 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297054614 The bacteria that cause tetanus can be found in soil, manure, or dust. Common signs of tetanus include spasms and stiffness in your jaw muscles. If tetanus does develop, seek hospital treatment immediately. ]]> 2018-10-25 16:40:36 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297054614 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297195620 Tetany can be the result of an electrolyte imbalance. Tetany can also be caused by magnesium deficiency or too little potassium.  Some of the symptoms of low blood calcium are muscles cramps or spasms in your legs, feet, lower back, or face.]]> 2018-10-25 21:32:31 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297195620 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297197105 Smooth muscle is also sometimes known as Involuntary muscle due to our inability to control its movements.  Smooth muscle determines the flow of blood in the arteries. Smooth muscle tissue tends to demonstrate greater elasticity ]]> 2018-10-25 21:39:27 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297197105 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297197973 Cardiac muscle is also an involuntary muscle, found only in the heart. Cardiac muscles control the contraction and relaxation of the heart. The cardiac muscle has one job, and it is to pump blood through the blood vessels in the body.]]> 2018-10-25 21:44:02 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297197973 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297204662 2018-10-25 22:20:06 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297204662 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297205655 Skeletal muscle is a form of striated muscle tissue which is under the voluntary control of the somatic nervous system. Most skeletal muscles are attached to bones by bundles of collagen fibers known as tendons. The skeletal muscles allow the body to move. ]]> 2018-10-25 22:26:56 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297205655 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297206940 The sliding filament theory is the explanation for how muscles contract to produce force. ]]> 2018-10-25 22:35:52 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297206940 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297207520 Actin is the most abundant protein in most eukaryotic cells. Moreover, the interaction of filamentous actin with myosin forms the basis of muscle contraction. Owing to its central role in the cell, the actin cytoskeleton is also disrupted or taken over by numerous pathogens.]]> 2018-10-25 22:40:00 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297207520 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297207584 Myosin is a special protein that converts adenosine triphosphate (ATP) into mechanical energy. Some myosins are involved in muscle contraction. These myosins interact with other myosin proteins, forming thick filaments.]]> 2018-10-25 22:40:33 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297207584 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297207690 Upon nervous system excitation for a contraction, calcium is released into the fiber.  The 1% of calcium that is not located in our bones or teeth is found in our blood, muscles and in the fluid between cells. Calcium triggers contraction by reaction with regulatory proteins that in the absence of calcium prevent interaction of actin and myosin. ]]> 2018-10-25 22:41:18 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297207690 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297209743 Contractility is the ability of muscle cells to forcefully shorten. For instance, in order to flex your elbow you need to contract the biceps brachii. Notice that in order to extend your elbow, the posterior arm extensor muscles need to contract. Thus, muscles can only pull, never push.

]]> 2018-10-25 22:54:07 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297209743 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297209963 Extensibility is the ability of a muscle to be stretched. In order to be able to flex the elbow, the elbow extensor muscles must extend in order to allow flexion to occur. Lack of extensibility is known as spasticity. ]]> 2018-10-25 22:55:21 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297209963 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297210100 Elasticity is the ability to recoil or bounce back to the muscle's original length after being stretched. Ligaments are slightly elastic, so they can be stretched and gradually lengthen, increasing flexibility. When the limb of your body is moved in any way in any direction for any purpose, muscles and tendons accommodate by elongating or shortening at various key spots. ]]> 2018-10-25 22:56:20 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297210100 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297210177 Excitability is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone. For a muscle to contract and do work, its cells must be stimulated, most often by the nerves supplying them.  If the membrane becomes sufficiently depolarized, an action potential results; the muscle cell is then "excited" from an electrochemical standpoint.]]> 2018-10-25 22:56:55 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297210177 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297210307 The heart automaticity is a fundamental physiological function in higher organisms. The spontaneous activity is initiated by specialized populations of cardiac cells generating periodical electrical oscillations. The exact cascade of steps initiating the pacemaker cycle in automatic cells has not yet been entirely elucidated.]]> 2018-10-25 22:57:45 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297210307 nwal0290 https://padlet.com/nwal0290/u56h3wo63eap/wish/297210422 The muscle contracts when the myosin shifts, but the lack of ATP prevents it from detaching, and the muscle remains contracted. Such a process occurs in all muscles as the body becomes rigid. Rigor mortis usually sets in within four hours, first in the face and generally smaller muscles.]]> 2018-10-25 22:58:25 UTC https://padlet.com/nwal0290/u56h3wo63eap/wish/297210422