Human Anatomy Quiz 10: Muscle Tissue - Macroscopic

muscles

Movement of the skeletal system would not be possible without:

no

Is it possible for a single muscle to act alone to produce a movement?

yes

Should muscles be coordinated to produce movement?

two bones, a joint

What do muscles usually connect? What do muscles usually cross?

shorten

What does a contracted muscle do?

a muscle pulls on one bone while the other bone is stationary

What occurs when a contracted muscle shortens?

origin, insertion

What do you need to know about a muscle in order to determine its function?

opposing pairs

How do most muscles work in?

flexor, extensor

What is an example of an opposing pair?

40-50%

How much of an adult's body weight do muscles compose?

mechanical energy

What do the muscles convert chemical energy into?

move, stabilize, regulate organ volume, generate heat, propel and store fluids and solids through several body systems

Muscles transform chemical energy into mechanical energy to... (5 reasons)

skeletal, cardiac, smooth

What are the three types of muscle found in the body?

move bones of skeleton

What do skeletal muscles do?

striated

How do skeletal muscles appear under a microscope?

striped

What is another word for striated?

voluntary, somatic division of the nervous system

Are *most* of the skeletal muscles under voluntary or involuntary control? What are they in control by?

diaphragm, muscles of posture

Which skeletal muscles are under involuntary control?

skeletal

What kind of muscle is pictured here?

walls of heart

Where is the cardiac muscle only found in?

involuntary

Are the cardiac muscles under voluntary or involuntary control?

actin, myosin

What do the cardiac muscles have the same arrangement as?

mitochondria

What do cardiac muscles have more and larger of?

cardiac

What kind of muscle is pictured here?

involuntary

Are the smooth muscles under voluntary or involuntary control?

organs, vessels

Where are smooth muscles found *in*?

slow, last long

Describe the contractions of the smooth muscle:

a state of continued partial contraction

What is smooth muscle tone?

GI tract, walls must maintain steady pressure on the contents

What is smooth muscle tone important in? Why?

smooth

What kind of muscle is pictured here?

electrical excitability, contractility, extensibility, elasticity

What do all muscle tissue have (4 properties of muscle tissue)?

produce action potentials

What does electrical excitability do?

when muscle shortens and pulls on attachment points

What is contractility?

muscle to stretch without being damaged

What does extensibility allow for?

muscle to return to its original length after stretch or contraction

What does elasticity allow for?

organ

What is each skeletal muscle?

composed of many tissues

Why is a skeletal muscle an organ? (think definition of organ)

muscle cells (muscle fibers)

What is each skeletal muscle composed of thousands of?

fibers

What are muscle cells also known as?

a group of muscle fibers

What is a fascicle?

fascicles

What makes up a muscle (component-wise)?

protect, strengthen

What do the three layers of connective tissue do for the skeletal muscle? (2 things)

epimysium, perimysium, endomysium

What are the three layers of connective tissue of the skeletal muscles?

outermost layer, encircling around entire muscle

Where is the epimysium located in a skeletal muscle?

fascicle

What does the perimysium surround in a skeletal muscle?

fascicles

What give meat its "grain" appearance?

separate each muscle fiber (muscle cell) from each other

What does endomysium do in a skeletal muscle?

tendon

Where do the three layers of connective tissue of the skeletal muscles extend beyond the muscle to form?

attaches a muscle to a bone

What does a tendon do?

one artery, two veins, one somatic nerve

What is each skeletal muscle supplied with? (give #s for each)

within the skeletal muscle

Where are capillary beds located?

supply nutrients and take away waste

What do the capillary beds in the skeletal muscles do?

collection of many neurons

What is a somatic nerve?

branch many times to contact many muscle fibers (cells)

What does each axon of the skeletal muscle do?