Ch 4B

Select the correct statement regarding the stem cells of connective tissue.

"Blast" cells are undifferentiated, actively dividing cells.

Which of the following statements is true of connective tissue?

Collagen fibers provides high tensile strength

Which of the following statements is true?

Dense connective tissue includes a great deal of collagen Correct, the prominent element of dense connective tissue are the fibers. Dense regular connective tissue primarily has parallel collagen fibers and a few elastic fibers. Dense irregular connective tissue primarily has irregularly arranged collagen fibers and some elastic fibers. Elastic connective tissue contains a high proportion of elastic fibers.

A major characteristic of fibrocartilage is its unique amount of flexibility and elasticity.

False

Connective tissues that possess a large quantity of collagen fibers often provide the framework for organs such as the spleen and lymph nodes.

False

Fibrocartilage is also known as gristle.

False

The basic difference between dense irregular and dense regular connective tissues is in the amount of elastic fibers and adipose cells present.

False

How is hyaline cartilage different from elastic cartilage or fibrocartilage?

Fibers are not normally visible

Select the correct statement regarding adipose tissue.

Its primary function is nutrient storage.

Which of the following substances would NOT be found in significant amounts in the extracellular matrix of the illustrated areolar connective tissue?

Keratin Keratin is a protein typically found in epithelial tissues, notably the cornified layers of the epidermis. Keratin would therefore not be found in significant quantities in the ECM of connective tissues.

Which of the following characteristics is lacking in the typical areolar connective tissue pictured in the figure?

None of these characteristics is lacking. This tissue has all of these abilities

Why are adipose tissue, blood, and bone all considered to be connective tissues?

They have a common origin: mesenchyme Adipose tissue, bone, and blood (like all connective tissues) are derived from mesenchyme, an embryonic tissue. Also common to all connective tissues is the presence of cells and an extracellular matrix that consists of fibers bathed in ground substance.

Blood is considered a type of connective tissue.

True

Elastic connective tissue is found in the walls of the large arteries that leave the heart.

True

Functions of connective tissues include binding, support, insulation, and protection.

True

Macrophages are found in areolar and lymphatic tissues

True

The role of brown fat is to warm the body; whereas, the role of white fat is to store nutrients.

True

The shock-absorbing pads between the vertebrae are formed of fibrocartilage.

True

Which of the following is NOT a role of connective tissue?

absorption Absorption, the movement of substances into the body, is a role of epithelial tissue. Roles of connective tissue include binding and support, protection, insulation, and transportation of substances, via blood, within the body.

Which tissue type would likely function to hold the kidneys in place?

adipose

Edema (swelling) occurs when ________.

areolar tissue soaks up excess fluid in an inflamed area

Which is the most atypical connective tissue since it does NOT act as a binding or packaging material under normal conditions or provide structural support?

blood Blood, the fluid connective tissue (CT) within blood vessels, is the most atypical CT. It does not act as a binding or packing material; it does not provide structural support. It is classified as a CT only because it develops from mesenchyme and consists of cells (blood cells) surrounded by an extracellular fluid matrix (blood plasma).

Which of the following is NOT found in cartilage but is found in bone?

blood vessels

What tissue has lacunae, calcium salts, and blood vessels?

bone (osseous tissue)

Which tissue is correctly paired with its primary cell type?

bone; osteoblast Osteoblasts/cytes are the primary cell type for bone.

Cell type NOT found in areolar connective tissue

chondrocyte

The reason that intervertebral discs exhibit a large amount of tensile strength, which allows them to absorb shock, is because they possess ________.

collagen fibers

The fiber type that gives connective tissue great tensile strength is ________.

collgen

You observe a uniform tissue under a microscope. There is no lumen. The material looks densely packed, but you do not observe many nuclei. It appears that there are strands of fibers running in parallel directions. What type of tissue are you looking at?

connective tissue You are probably looking at dense regular connective tissue. Connective tissue has a low cell count compared to the extracellular matrix.

Connective tissues are made of different combinations of ground substance and fibers. As you compare slides of connective tissues, which would most likely be the strongest type of connective tissue based on the composition of ground substance and fibers?

connective tissues high in collagen fibers Collagen is the toughest of the fibers. If you saw collagen in high amounts, that would indicate strength in the connective tissue.

The shape of the external ear is maintained by ________.

elastic cartiage

Skin, lung, and blood vessel walls have which tissue characteristic in common?

elastic fibers

Mesenchymal cells are most commonly found in ________ connective tissue.

embryonic

Which of these terms applies best to all material in this tissue that is not cellular?

extracellular matrix The term matrix applies to all extracellular material seen, including the ground substance and all fibers.

Tendons and ligaments are composed mainly of dense irregular connective tissue.

false

Connective tissue extracellular matrix is composed of ________.

fibers and ground substance

The primary blast cell for connective tissue proper is the ________.

fibroblast

Which property is most consistent in the majority of connective tissues?

greater amount of extracellular matrix compared to cellular content Even in blood, the cellular portion is less concentrated than the plasma matrix that surrounds the blood cells.

What are the three main components of connective tissue?

ground substance, fibers, and cells

Choose which tissue type likely functions to add support to an organ.

hyaline cartiage

What activity does cell 1 undertake to contribute to the body's defense against injury and infection?

phagocytosis of foreign materials Cell 1 is a macrophage, which phagocytizes foreign materials such as bacteria and debris. It can be identified by its large size

In connective tissue, the role of elastic fibers is to __________.

provide flexibility Elastic fibers contain elastin, a rubberlike protein that allows them to stretch and recoil like rubber bands, making them very flexible.

Which statement best describes connective tissue?

usually contains a large amount of matrix

Chondroblasts ________.

within the cartilage divide and secrete new matrix