How Muscles move Flashcards
(26 cards)
What is the primary function of muscles?
To produce movement in the body.
True or False: Muscles can only contract.
True.
What type of muscle is responsible for voluntary movements?
Skeletal muscle.
Fill in the blank: The basic unit of muscle contraction is called a _____.
sarcomere.
What protein filaments are involved in muscle contraction?
Actin and myosin.
True or False: Smooth muscles are found in the walls of hollow organs.
True.
What is the role of calcium ions in muscle contraction?
They facilitate the interaction between actin and myosin.
What type of muscle tissue is involuntary and striated?
Cardiac muscle.
Multiple choice: Which of the following is NOT a type of muscle tissue? A) Skeletal B) Cardiac C) Epithelial D) Smooth
C) Epithelial.
What is the term for the ability of muscles to respond to stimuli?
Excitability.
Fill in the blank: Muscle fibers are bundled together by connective tissue called _____.
fascia.
True or False: Muscle contraction is powered by ATP.
True.
What is the sliding filament theory?
It explains how muscle fibers contract by the sliding of actin over myosin filaments.
What is the role of the neuromuscular junction?
It is the site where a motor neuron communicates with a muscle fiber to initiate contraction.
Multiple choice: Which ion is crucial for muscle contraction? A) Sodium B) Potassium C) Calcium D) Magnesium
C) Calcium.
What is muscle hypertrophy?
The increase in the size of muscle fibers due to resistance training.
True or False: All muscles in the body can regenerate after injury.
False.
What is the function of tendons?
To connect muscles to bones.
Fill in the blank: The muscle responsible for the movement of a joint is called the _____ muscle.
agonist.
What is an antagonist muscle?
A muscle that opposes the action of the agonist.
Multiple choice: What is the primary energy source for muscle contraction? A) Glucose B) Fatty acids C) Creatine D) Protein
A) Glucose.
What is isometric contraction?
A type of muscle contraction where the muscle does not change length.
True or False: Muscle fibers can only be either fast-twitch or slow-twitch.
False.
What is the role of the sarcoplasmic reticulum in muscle cells?
To store and release calcium ions during muscle contraction.
