Ch. 45 Flashcards Preview

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Flashcards in Ch. 45 Deck (28):
0

Four body cavities

Cranial
Spinal
Thoracic- above diaphragm
Abdominal- below diaphragm

1

Four types of human tissue

Muscle
Nervous
Epithelial
Connective

2

Appendicular skeleton

Arms
Legs
Scapula
Clavicle
Pelvis

3

Function of bones

Support
Movement
Protection
Mineral storage
Production of blood cells

4

Osteoporosis

Loss of bone minerals- become brittle and weak

5

Ligaments

Tough connective tissue
Hold bones together

6

Tendons

Attach muscle to bone
Origin/insertion

8

Three muscle types

Smooth
Cardiac
Skeletal

9

Smooth muscle

Involuntary
Stomach wall
Blood vessels

10

Cardiac muscle

Involuntary
Heart walls

11

Joints- types+ examples

Places where bones meet
Fixed- skull
Semi movable-vertebrae
Movable- hips, arms etc

12

How muscles contract

Myosin "heads" pull the actin in
Muscle shortens
Requires ATP to detach myosin from actin

13

Skeletal muscle

Voluntary
Moves bones

14

Ossification

Cartilage becomes hard due to mineral deposits
3rd fetal month

15

Bone growth

Takes place at epiphyseal plates (bone ends)

16

Compact bone

Provides strength
Blood vessels running through ja version canals

17

Periosteum

Thick membrane
Contains blood vessels and nerves

18

Axial skeleton

Skull
Ribs
Spine
Sternum

19

Skeletal problems

Rheumatoid arthritis
Osteoarthritis
Osteoporosis

20

Rheumatoid arthritis

Immune system attacks joint tissue

21

Epidermis

Mostly dead skin cells
Contain keratin
Constantly replaced

22

Osteoarthritis

Cartilage wears away- bones rub

23

Melanin

Brown skin pigment
Amount depends on heredity, exposure to UV

24

Dermis layer

Living cells
Sensory neurons
Blood vessels
Muscles
Hair follicles
Exocrine glands

25

Subcutaneous fat

Layer of fat under skin
Energy store
Insulation

26

Z- line

Where actin fibers connect

27

Sebaceous glands

Softens skin and hair
Produce sebum
Bacteria can cause acne

28

Myofibrils

Thread like structure of a muscle fiber
Two protein filaments- myosin, actin