Exam 3 Vocab

Question 1

Endomysium

Answer 1

The endomysium, meaning within the muscle, is a wispy layer of areolar connective tissue that ensheaths each individual muscle fiber, or muscle cell.

Question 2

Epimysium

Answer 2

is the fibrous tissue envelope that surrounds skeletal muscle

Question 3

Fascicle

Answer 3

Each fascicle (or fasciculus) is a bundle of muscle fibers, also called myocytes, bound together via the endomysium tissue that provides pathways for the passage of blood vessels and nerves.

Question 4

Myocytes

Answer 4

The muscle cell, also known as the myocyte is the smallest subunit of all muscular tissues and organs throughout the body

Question 5

Fiber

Answer 5

Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium. Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium.

Question 6

Myofilament

Answer 6

Myofilaments are the three protein filaments of myofibrils in muscle cells. The main proteins involved are myosin, actin, and titin.

Question 7

Myosins

Answer 7

are a superfamily of motor proteins best known for their roles in muscle contraction and in a wide range of other motility processes in eukaryotes. They are ATP-dependent and responsible for actin-based motility.

Question 8

Actin

Answer 8

Actin is a family of globular multi-functional proteins that form microfilaments in the cytoskeleton, and the thin filaments in muscle fibrils

Question 9

Striated muscle tissue

Answer 9

is a muscle tissue that features repeating functional units called sarcomeres. The presence of sarcomeres manifests as a series of bands visible along the muscle fibers, which is responsible for the striated appearance observed in microscopic images of this tissue.

Question 10

2 types of striated muscles

Answer 10

Cardiac
Skeletal

Question 11

Skeletal muscles

Answer 11

are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers.The muscle tissue of a skeletal muscle is striated – having a striped appearance due to the arrangement of the sarcomeres.

Question 12

sarcomere

Answer 12

A sarcomere the smallest functional unit of striated muscle tissue

Question 13

Perimysium

Answer 13

the sheath of connective tissue surrounding a bundle of muscle fibers.

Question 14

Sarcolemma

Answer 14

the fine transparent tubular sheath which envelops the fibers of skeletal muscles.

Question 15

Sarcoplasm

Answer 15

the cytoplasm of striated muscle cells.

Question 16

Perimysium

Answer 16

Connective tissue surrounding a fascicle

Question 17

Epimysium

Answer 17

Connective tissue ensheathing the ENTIRE muscle

Question 18

Sarcomere

Answer 18

contractile unit of muscle

Question 19

fiber

Answer 19

a muscle cell

Question 20

endomysium

Answer 20

thin connective tissue investing each muscle CELL

Question 21

Sarcolemma

Answer 21

plasma membrane of the muscle cell

Question 22

Myofibril

Answer 22

a long, filamentous organellefoundwithin muscle cells that has a banded appearance

Question 23

Myofilament

Answer 23

actin or myosin containing structure

Question 24

Tendon

Answer 24

Cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone

Question 25

Fascicle

Answer 25

A discrete bundle of muscle cells