Chapter 6 quiz

Question 1

The bulk of the body is called

Answer 1

Skeletal muscle

Question 2

Major component of the walls of hollow organs and the heart?

Answer 2

Smooth and cardiac muscle

Question 3

The term muscular system applies specifically to

Answer 3

skeletal muscle

Question 4

The nuclei are pushed aside by longitudinally arranged

Answer 4

myofibrils, which nearly fills the cell interior

Question 5

Myofibrils are made up of even smaller threadlike structures called

Answer 5

myofilaments

Question 6

slide past each other during muscle activity to bring about shortening or contraction

Answer 6

actin and myosin

Question 7

What is responsible for the binding pattern in skeletal muscle?

Answer 7

The precise arrangement of the myofilaments within the myofibrils

Question 8

The actual contractile units of muscle?

Answer 8

sarcomers

Question 9

Muscle fibers, which are soft and fragile, are bundled together with connective tissue to form

Answer 9

skeletal muscles

Question 10

Each muscle fiber is enclosed in delicate connective sheath called

Answer 10

endomysium

Question 11

Several sheathed muscle fibers are wrapped by a cpllagenic membrane called

Answer 11

perimysium, forming a fiber bundle called fasicle

Question 12

Encloses the entire muscle

Answer 12

Epimysium

Question 13

Another function of connective tissue other than binding and strengthening of muscle fibers

Answer 13

Provide a route for the entry and exit of nerves and blood vessels that serve the muscle fibers

Question 14

Skeletal muscles are always stimulated by

Answer 14

motor neurons via nerve impulses

Question 15

The junction between a nerve fiber (axon) and a muscle cell is called a

Answer 15

Neuromuscular or myoneural junction

Question 16

Each motor axions breaks up into many branches called

Answer 16

axon terminals as it nears the muscle and each branch forms a neuromuscular junction with a single muscle cell.

Question 17

Within the axonal terminals are mitochondria and vesicles containing a neurotransmitter chemical called

Answer 17

acetylcholine ACh