L7.1 - Musculoskeletal System

Question 1

Musculoskeletal system

Answer 1

The system of organs and tissues that protect, move, and define the shape of the human body

Question 2

Muscle

Answer 2

Contractile and connective tissues grouped into coordinated systems for efficiency with the primary functions of movement, maintaining shape and posture, and energy storage

Question 3

Myocyte

Answer 3

AKA muscle fiber or muscle cell, cells that contain fibers of contractile proteins and build muscle tissue

Question 4

Myofibril

Answer 4

A long contractile fiber that runs the length of the cell

Question 5

Myosin

Answer 5

The contractile protein that makes the thick fibers within myofibrils

Question 6

Actin

Answer 6

The contractile protein that makes the thin fibers within myofibrils

Question 7

Sarcomere

Answer 7

The functional contractile unit of muscle consisting of overlapping bands of myosin and actin

Question 8

Z-line

Answer 8

The zig-zagged anchor point consisting mostly of actin - forms the end points of each sarcomeres

Question 9

M-line

Answer 9

The mid-line of the sarcomere and anchor for the myosin filaments

Question 10

Smooth muscle

Answer 10

Muscle tissue consisting of myocytes that do not possess a discernable system of sarcomeres

Question 11

Skeletal muscle

Answer 11

AKA striated or voluntary muscle, muscle tissue consisting of myocytes that possess a system of densely packed, highly organized sarcomeres, thus the banded appearance

Question 12

Cardiac muscle

Answer 12

Muscle consisting of myocytes that are similar in size and shape to smooth muscle myocytes but also possess that organized sarcomeres and banding of skeletal