Muscular / Skeletal System

Question 1

connective tissue that is softer and more flexible than bone

Answer 1

cartilage

Question 2

formed by ossification

two types: compact and spongy

Answer 2

bone

Question 3

canals found in compact bone

Answer 3

Haversian canals

Question 4

cells that build bone

Answer 4

osteoblasts

Question 5

cells that break down old bone

Answer 5

osteoclasts

Question 6

skeleton that includes: skull, vertebral column, and rib cage

Answer 6

axial skeleton

Question 7

skeleton that includes: bones of appendages (arms and legs), and the pectoral and pelvic girdle

Answer 7

appendicular skeleton

Question 8

point at which bones come together

Answer 8

joints

Question 9

secretions lubricates joints

lines the capsule

Answer 9

synovial membrane

Question 10

if joints are not properly lubricated, ________ occurs

Answer 10

Arthritis

Question 11

connect bones to bones

Answer 11

ligaments

Question 12

connect muscle to bone

Answer 12

tendons

Question 13

point of attachment of a muscle to a stationary bone

Answer 13

origin

Question 14

point of attachment of a muscle to a bone the moves

Answer 14

insertion

Question 15

indicates a straightening of a joint

Answer 15

extension

Question 16

refers to a bending of a joint

Answer 16

flexion

Question 17

site of bone cell formation

Answer 17

bone marrow

Question 18

three types of muscle

Answer 18

smooth
cardiac
skeletal

Question 19

type of muscle in the digestive system
involuntary
autonomic nervous system
not striated

Answer 19

smooth muscle

Question 20

type of muscle in the heart
involuntary
autonomic system
striated

Answer 20

cardiac muscle

Question 21

type of muscle connected to bones
voluntary
somatic nervous system
striated

Answer 21

skeletal muscle

Question 22

anatomy of a muscle

Answer 22

sarcomere&raquo_space;> myofibril&raquo_space;> fiber&raquo_space;> bundle&raquo_space;> muscle

Question 23

contractile unit of a muscle
composed of thick (myosin) and thin (actin) filaments that slide past each other
composed of Z lines, M lines, I band, H zone, and A band

Answer 23

sarcomere

Question 24

Individual muscle fibers exhibit a(n) ____________ response and will only be stimulated by a threshold intensity stimulus.

Answer 24

all-or-none

Question 25

part of sarcomere that gets shorter during contraction
contains the Z-band
no myosin

Answer 25

I band and H-band

Question 26

cytoskeletal element of sarcomere

holds actin together

Answer 26

Z lines

Question 27

area of sarcomere that does not contain actin

Answer 27

H-band

Question 28

part of sarcomere that contains myosin

does not get shorter during contraction

Answer 28

A band

Question 29

includes the sarcomere

enveloped by a modified endoplasmic reticulum that stores Ca 2+ ions (sarcoplasmic reticulum)

Answer 29

Myofibril

Question 30

modified ER that store Ca 2+ ions

envelopes myofibrils

Answer 30

sarcoplasmic reticulum