Quiz 4 Flashcards

1
Q

What does connective tissue consist of?

A

mostly fibers and ground substance, with widely separated cells

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2
Q

Tendons bind…

A

muscle to bone

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3
Q

Ligaments bind…

A

bones together

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4
Q

What is the purpose of connective tissue?

A

binding to organs, support, physical protection, immune protection, movement, storage, heat production, and transport

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5
Q

How is connective tissue supportive?

A

cartilage supports other structures besides the body

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6
Q

Movement?

A

bones provide a lever system for movement; cartilage on bone surfaces eases joint movement

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7
Q

How is connective tissue used for storage?

A

fat is a connective tissue that forms the body’s major energy reserve

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8
Q

What kind of fat generates heat in infants and children?

A

brown fat

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9
Q

How does connective tissue transport?

A

blood is a connective tissue that transports gases, nutrients, wastes and other material

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10
Q

What is the most diverse type of connective tissue?

A

fibrous

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11
Q

What is fibrous connective tissue made of?

A

cellular and fibrous components in a ground substance

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12
Q

What are the six types of cellular components

A

fibroplasts, macrophages, leukocytes, plasma cells, mast cells, adipocytes

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13
Q

What is a fibroplast?

A

produce the fibers and ground substance of the tissue

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14
Q

What is a macrophage?

A

large phagocytic cells that engulf and destroy bacteria

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15
Q

What are plasma cells?

A

synthesize antibodies

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16
Q

What are mast cells?

A

near blood vessels secrete heparin and histamine

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17
Q

What are adipocytes?

A

fat cells that store triglycerides for feul

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18
Q

What are the three types of protein fibers in fibrous components?

A

collagenous, reticular, and elastic

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19
Q

What are collagenous fibers?

A

made of collagen and are tough, flexible, and resist stretching

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20
Q

What are reticular fibers?

A

thin collagen fibers coated with glycoprotein, forming a spongelike framework in some organs

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21
Q

What are elastic fibers?

A

made of elastin, which can recoil from stretching like a rubber band

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22
Q

What is ground substance?

A

occupies the space between cells and fibers and usually has gelatinous consistency because of proteoglycans and glycoproteins

23
Q

What two categories are fibrous connective tissue divided into?

A

loose connective tissue and dense connective tissue

24
Q

What is loose connective tissue?

A

much of the space is occupied by ground substance

25
Q

What is dense connective tissue

A

fiber occupies more space than cells and ground substance

26
Q

What is areolar tissue?

A

exhibits loosely organized fibers, abundant blood vessels, and a lot of empty space

27
Q

What is reticular tissue?

A

a mesh of reticular fibers and fibroblasts forming the structural framework (stroma) of many organs

28
Q

Why is dense regular connective tissue called that?

A

closely packed collagen fibers with little open space; and the parallel arrangement of fibers

29
Q

What are the fibers in areolar tissue like?

A

randomly organized and mostly collagenous, although elastic and reticular fibers are present

30
Q

Where is areolar tissue found?

A

underlying nearly all epithelia, including the skin and membranes of the body and surrounding blood vessels and nerves

31
Q

Why are the fibers in dense regular connective tissue arranged the way they are?

A

it is an adaptation to directional pull, such as on tendons and ligaments

32
Q

What kind of cells do dense regular connective tissue consist of?

A

fibroblasts

33
Q

What is dense irregular connective tissue?

A

has closely packed collagen fibers, but the collagen bundles run in random directions

34
Q

Why are the fibers arranged that way in dense irregular connective tissue?

A

random orientation allows resistance to unpredictable stresses

35
Q

What is adipose tissue?

A

fat tissue in which adipocytes are dominant cell type

36
Q

What is white fat?

A

more abundant and is the only significant fat tissue in adults

37
Q

How big are adipocytes?

A

70 to 120 um in diameter but may be five times as large in obese people

38
Q

What is the purpose of adipose tissue?

A

provides thermal insulation, anchoring, and cushioning

39
Q

What is cartilage?

A

a supportive connective tissue with a flexible rubbery matrix

40
Q

What are chondroblasts?

A

secrete and surround themselves with matrix until they are trapped in cavities called lacunae, at which time they are called chondrocytes

41
Q

What is hyaline cartilage?

A

clear and glassy in microscopic appearance; the collagen fibers are very fine and invisible

42
Q

What is elastic cartilage?

A

conspicuous elastic fibers

43
Q

What is fibrocartilage?

A

has coarse, readily visible bundles of cartilage

44
Q

Define bone

A

refers either to an organ such as the femur and mandible, composed of multiple tissue types, or to bone tissue (osseous tissue), which makes up most of the mass of the bones

45
Q

What is spongy bone?

A

fills the heads of long bones and forms the middle layer of flat bones such as the sternum

46
Q

What is compact (dense) bone?

A

a calcified tissue with no spaces visible to the naked eye

47
Q

How is compact bone arranged?

A

in cylinders of tissue that surround central (haversian or osteonic) canals that run longitudinally through long bones?

48
Q

What travels through the canals of bones?

A

blood and nerves

49
Q

What is bone matrix composed of?

A

deposited in concentric lamellae around each central canal

50
Q

What is an osteon?

A

a central and its surrounding lamellae

51
Q

What are osteocytes?

A

between the lamellae are occupied by mature bone cells

52
Q

What are canaliculi?

A

tiny canals radiate between lacunae allowing osteocytes to contact each other

53
Q

What is the bone as a whole covered in?

A

fibrous periosteum

54
Q

What is two-thirds of the weight of bone?

A

calcium salts deposited around the collagen fibers