How do muscles work Flashcards
What are muscles?
Muscles are found all over our body. They control the movements we make and help us to move our bodies.
If we think about moving some muscles, like our arm muscles, they move. Other muscles, like our heart, move on their own without us thinking about it.
Muscles often work in _______-, pulling on your bones so that you can move. When a muscle _________ it gets _________and then relaxes to return to its normal length.
pairs
contracts
shorter
Your skeleton has ________ which allow movement when your muscles contract and relax. Some of these joints are very _________, like your shoulder and hip. Others, like your knee and elbow, move a little less. Others, like your spine and neck, are only able to move a little.
joints
flexible
It is important to eat a healthy diet with enough
________
to help your muscles grow properly
protein
Where do we find protein?
We find protein in meat, fish, eggs and beans.
Define protein;
A food group used for growth and repair. Foods like meat, fish, eggs and dairy products contain lots of protein.
How many muscles are there in your body?
There are over 600 muscles in your body, from those in your toes to your tongue!
We need _______ to allow us to move our limbs.
muscles
Muscles are held onto the skeleton with ______ .
tendons
When a muscle in your arm tightens, your arm moves ____ .
up
When the muscle relaxes, your arm moves ___ .
down
What attaches muscles to bones?
Tendons
What happens when a muscle contracts?
It gets shorter
Muscles can only ____ and cannot push.
pull
How many muscles are in the adult human body?
600+
Protein helps your muscles grow?
True
Muscles provide the tug on the bones needed to bend, straighten, and support joints. Muscles can pull on bones, but they can’t push them back to their original position, so the muscles work in pairs of _______and _________.
flexors
extensors
Muscles are how we move and live. All movement in the body is controlled by _______. Some muscles work without us thinking, like our heart beating, while other muscles are controlled by our thoughts and allow us to do stuff and move around. All of our muscles together make up the body’s ______________
muscles
muscular system
There are over 600+ muscles in the human body. They are under our skin and cover our bones. Muscles often work together to help us ________. We don’t really have to think about moving each individual muscle. For example, we just think of running and our body does the rest.
move
Muscles work by _______- and _________. Muscles have long, thin cells that are grouped into bundles. When a muscle fiber gets a signal from its nerve, proteins and chemicals release energy to either contract the muscle or relax it. When the muscle contracts, this pulls the bones it’s connected to closer together.
contracting and relaxing
Many of our muscles come in __________. An example of this is the biceps and triceps in our arms. When the biceps contract the triceps will relax, this allows our arm to bend. When we want to straighten our arm back out, the biceps will relax and the triceps will contract. Muscle pairs allow us to move back and forth.
pairs
You get 3 types of muscles?
Skeletal Muscles - These are the muscles we use to move around. They cover our skeleton and move our bones. Sometimes they are called striped muscles because they come in long dark and light bands of fibers and look striped. These muscles are voluntary because we control them directly with signals from our brains.
Smooth Muscles - Smooth muscles are special muscles that don’t connect to bones, but control organs within our body. These muscles work without us having to think about them.
Cardiac Muscle - This is a special muscle that pumps our heart and blood through our body.
________________- These are the muscles we use to move around. They cover our skeleton and move our bones. Sometimes they are called striped muscles because they come in long dark and light bands of fibers and look striped. These muscles are voluntary because we control them directly with signals from our brains.
skeletal muscles
__________ - Smooth muscles are special muscles that don’t connect to bones, but control organs within our body. These muscles work without us having to think about them.
Smooth Muscles - Smooth muscles are special muscles that don’t connect to bones, but control organs within our body. These muscles work without us having to think about them.
