Muscular System Overview

Which of the following is a function of the muscular system?

• Produces movement

• Generates electricity

• Absorbs nutrients

• Filters blood

Muscle tissues have the ability to respond to a stimulus from a neuron or hormone. What is this characteristic called?

• Excitability

• Contractility

• Extensibility

• Elasticity

Muscle tissues can lengthen or stretch past their original shape. What is this characteristic called?

• A) Excitability

• B) Contractility

• C) Extensibility

• D) Elasticity

The ability of muscle tissues to recoil or bounce back to their original shape is known as what?

• A) Excitability

• B) Contractility

• C) Extensibility

• D) Elasticity

Actin and myosin filaments work together to produce a muscle contraction. What is this process called?

• Sliding filament theory

• Muscle expansion theory

• Filament fusion theory

• Contraction theory

During the sliding filament theory, which ion exposes the active site for myosin heads to attach?

• Sodium

• Potassium

• Calcium

• Magnesium

What are some criteria used to name muscles?

• Size, shape, location

• Color, texture, density

• Age, weight, height

• Speed, agility, strength.

The _______ filament pulls on the thinner actin filament to shorten a sarcomere.

• Myosin

• Actin

• Troponin

• Tropomyosin

The process of muscle contraction repeats until the muscle contracts completely. This process is known as the _______ theory.

• Sliding filament

• Muscle expansion

• Filament fusion

• Contraction

When muscles don't get enough ATP, they can become what?

• Energized

• Fatigued

• Relaxed

• Stiff

Tags

NGSS.HS-LS1-7