WorksheetsMuscle Contraction
Total questions: 15
Worksheet time: 8mins
What are the three types of muscle tissue?
Smooth, cardiac, and skeletal
Smooth, cardiac, and connective
Smooth, skeletal, and connective
Cardiac, skeletal, and connective
Which type of muscle tissue is found in the walls of hollow visceral organs?
Smooth muscle tissue
Cardiac muscle tissue
Skeletal muscle tissue
Connective muscle tissue
What is the specialized name for the endoplasmic reticulum in muscle cells?
Sarcoplasmic reticulum
Mitochondrial reticulum
Cardiac reticulum
Smooth reticulum
What is the function of the sarcoplasmic reticulum in muscle cells?
To store and release calcium ions
To produce ATP
To transport nutrients
To contract and relax the muscle
What is the role of troponin and tropomyosin in muscle contraction?
They block actin sites and are moved by calcium
They bind to myosin and cause contraction
They produce ATP for muscle energy
They relax the muscle after contraction
What triggers the release of calcium from the sarcoplasmic reticulum?
An action potential traveling down the T-tubules
The binding of ATP to myosin
The release of acetylcholine by motor neurons
The contraction of actin and myosin
What happens when myosin binds to actin during muscle contraction?
The sarcomere contracts and the muscle shortens
The sarcomere relaxes and the muscle lengthens
The calcium is released from the sarcoplasmic reticulum
The ATP is broken down into ADP and phosphate
What is the role of ATP in muscle contraction?
To provide energy for myosin to bind and release from actin
To transport calcium ions into the sarcoplasmic reticulum
To relax the muscle after contraction
To produce acetylcholine for motor neuron signaling
What happens when myosin releases from actin during muscle relaxation?
The sarcomere lengthens and the muscle relaxes
The sarcomere contracts and the muscle shortens
The calcium is released from the sarcoplasmic reticulum
The ATP is broken down into ADP and phosphate
What is the main source of ATP for muscle cells?
Mitochondria
Sarcoplasmic reticulum
T-tubules
Motor neurons
What is the sliding filament model of muscle contraction?
The actin and myosin filaments slide past each other, causing muscle contraction
The actin and myosin filaments bind together, causing muscle relaxation
The actin and myosin filaments break apart, causing muscle contraction
The actin and myosin filaments release calcium, causing muscle relaxation
What is the function of smooth muscle tissue?
To push fluid and material through hollow organs
To pump blood throughout the body
To create voluntary movement
To support the weight and fend off gravity
What is the function of cardiac muscle tissue?
To pump blood throughout the body
To push fluid and material through hollow organs
To create voluntary movement
To support the weight and fend off gravity
What is the function of skeletal muscle tissue?
To create voluntary movement and support the weight
To pump blood throughout the body
To push fluid and material through hollow organs
To support the weight and fend off gravity
What is the structure of a skeletal muscle?
Bundles of myofibrils, which are made up of muscle fibers
Bundles of fascicles, which are made up of myofibrils
Bundles of muscle fibers, which are made up of fascicles
Bundles of actin and myosin, which are made up of sarcomeres
