The Muscular System

A person riding in a 100-mile bicycle race relies on which energy system to fuel her long ride?

aerobic respiration

The skeletal system includes the

bones.

_____________ is striated muscle that is not under conscious control.

cardiac

The main job of a tendon is to

connect muscle to bone.

The triceps is primarily responsible for

elbow extension.

The innermost type of connective tissue that forms a sheath around individual muscle cells is the

endomysium.

The perimysium is a connective tissue that surrounds the ______________.

fascicle

Muscle cells are bundled up into a functional unit called the

fascicle.

Stretching after exercise can improve an athlete's

flexibility.

A person pedaling a bicycle is doing which two movements with her knees?

flexion and extension

When the biceps brachii contracts, the wrist moves closer to the shoulder. This movement is called

flexion.

How long can a muscle move before it uses up all the energy stored within the muscle tissue?

four to six seconds

The largest muscle of the body is the

gluteus maximus.

Which of these are functions of the skeletal muscle system? Check all of the boxes that apply.

helping to maintain upright posture helping to stabilize joints producing heat to maintain internal body temperature

The muscles of mastication are located

in the face.

Stabilization is

keeping one joint in place while another joint moves.

A football player injured his hamstrings in the last game. Which part of his body is hurt?

leg

The primary job of a stabilizing muscle is to

maintain the position of a joint while another joint is moving.

The endomysium is a connective tissue that surrounds the ______________.

muscle fiber

The part of a muscle cell that can contract is called the

myofibril.

The deep fascia work to ____________________________________.

organize muscles

The function of the extraocular muscles is to

produce eye movements.

Which of these muscle pairs produces opposite motions of the same body part?

quadriceps femoris and hamstrings

Use the drop-down menu to select the best answer. Aerobic respiration _________________________________.

requires oxygen

What is the muscle tissue able to do? Check all of the boxes that apply.

shorten in length respond to stimuli stretch beyond its normal length

The trapezius is a muscle that functions to stabilize which body part?

shoulder

_______________ is striated muscle under conscious control.

skeletal

A _______________ is also known as a muscle fiber.

skeletal muscle cell

Which of these types of muscles are under conscious control?

skeletal muscles

Which of these types of muscles are striated? Check all of the boxes that apply.

skeletal muscles cardiac muscles

The part of the muscular system responsible for movement is

skeletal.

__________________ is nonstriated muscle that is not under conscious control.

smooth

Muscle cells are able to contract in response to a _____________.

stimulus

The function of the erector spinae muscles is to

support the back's upright posture.

A _____________ connects the muscles in the lower leg to the heel bone.

tendon

Which of these is the energy-carrying particle that enables muscle contraction?

ATP

___________________ is the property that allows a muscle to return to its original shape after being stretched.

Elasticity

___________________ is a group of muscle fibers arranged in a bundle.

Fascicles

The muscular system works in conjunction with the nervous system. If it didn't, what would happen?

The muscles would not receive electrical signals telling them to contract.