Muscles must have at least 2 points of attachment

The attachment that moves is called the Insertion; the attachment that remains stationary is the Origin Muscles must cross at least 1 joint

Muscles work in opposing pairs: A muscle that decreases the angle of the joint is called a Flexor; a muscle that increases the angle of a joint is called an extensor

Muscles can only pull / contract to get shorter.

Macroscopic striations show the direction of muscle contraction.

Muscles must cross at least 1 joint

Muscle fatigue is when your muscles get tired and can’t work as well after being used for a long time.

An EMG is a test that shows how your muscles and nerves work by measuring their electrical signals.

Tetany is when muscles tighten or cramp because of low calcium or other chemical imbalances in the body.

A tendon is a tough band that connects muscle to bone.

Skeletal muscle is the type of muscle that moves your bones and body parts.

Cardiac muscle is the muscle found only in the heart that helps it pump blood.

Smooth muscle is found in organs like the stomach and works automatically.

A sarcomere is the smallest part of a muscle that can contract to make the muscle move.

Sarcoplasmic Reticulum

The sarcoplasmic reticulum is a network in muscle cells that stores and releases calcium, which helps muscles contract.

Calcium ions (Ca²⁺) are tiny particles that help muscles contract and are important for bones and nerves.

Actin filaments are thin protein threads in muscles that help the muscle contract.

Myosin filaments are thick protein threads in muscles that pull on actin filaments to make the muscle contract.

Troponin is a protein in muscles that helps control muscle contraction by responding to calcium.

Tropomyosin is a protein in muscles that blocks muscle contraction until calcium signals tell it to move.

Adenosine Triphosphate (ATP)

Adenosine Triphosphate (ATP) is the energy molecule that muscles use to contract and do work.

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HBS 1.2 - Muscles

Term	Definition
Muscles must have at least 2 points of attachment	Muscles must have at least 2 points of attachment
The attachment that moves is called the Insertion; the attachment that remains stationary is the Origin Muscles must cross at least 1 joint	The attachment that moves is called the Insertion; the attachment that remains stationary is the Origin Muscles must cross at least 1 joint
Muscles work in opposing pairs: A muscle that decreases the angle of the joint is called a Flexor; a muscle that increases the angle of a joint is called an extensor	Muscles work in opposing pairs: A muscle that decreases the angle of the joint is called a Flexor; a muscle that increases the angle of a joint is called an extensor
Muscles can only pull / contract to get shorter.	Muscles can only pull / contract to get shorter.
Macroscopic striations show the direction of muscle contraction.	Macroscopic striations show the direction of muscle contraction.
Muscles must cross at least 1 joint	Muscles must cross at least 1 joint
Muscle Fatigue	Muscle fatigue is when your muscles get tired and can’t work as well after being used for a long time.
Electromyogram (EMG)	An EMG is a test that shows how your muscles and nerves work by measuring their electrical signals.
Tetany	Tetany is when muscles tighten or cramp because of low calcium or other chemical imbalances in the body.
Tendon	A tendon is a tough band that connects muscle to bone.
Skeletal Muscle	Skeletal muscle is the type of muscle that moves your bones and body parts.
Cardiac Muscle	Cardiac muscle is the muscle found only in the heart that helps it pump blood.
Smooth Muscle	Smooth muscle is found in organs like the stomach and works automatically.
Sarcomere	A sarcomere is the smallest part of a muscle that can contract to make the muscle move.
Sarcoplasmic Reticulum	The sarcoplasmic reticulum is a network in muscle cells that stores and releases calcium, which helps muscles contract.
Calcium Ions (Ca+2)	Calcium ions (Ca²⁺) are tiny particles that help muscles contract and are important for bones and nerves.
Actin filaments	Actin filaments are thin protein threads in muscles that help the muscle contract.
Myosin filaments	Myosin filaments are thick protein threads in muscles that pull on actin filaments to make the muscle contract.
Troponin	Troponin is a protein in muscles that helps control muscle contraction by responding to calcium.
Tropomyosin	Tropomyosin is a protein in muscles that blocks muscle contraction until calcium signals tell it to move.
Adenosine Triphosphate (ATP)	Adenosine Triphosphate (ATP) is the energy molecule that muscles use to contract and do work.

Created by: user-1970300

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