Question 1

The tissue that always has a "top" and a "bottom" is

Accepted Answer

Epithelial tissue has an apical (top) surface and a basal (bottom) surface, distinguishing it from other tissue types.

Question 2

The pancreas produces_____ secretions.

Accepted Answer

The pancreas produces both exocrine secretions (digestive enzymes) and endocrine secretions (hormones like insulin and glucagon).

Question 3

During an inflammatory response to injury, which of the following is the least likely in the region of the injury?

Accepted Answer

During an inflammatory response, the area typically becomes red, warm, and swollen due to increased blood flow and histamine release. Pale cold skin is least likely as it indicates reduced blood flow.

Question 4

Dead skin cells are shed in thin sheets because they are held together by "spots" of proteoglycan reinforced by intermediate filaments. Such strong intercellular connections are called

Accepted Answer

Desmosomes are strong intercellular connections that hold cells together, reinforced by intermediate filaments and proteoglycans, allowing dead skin cells to be shed in sheets.

Question 5

The basic shapes of epithelial cells include all of the following, except

Accepted Answer

Epithelial cells are typically classified into three basic shapes: columnar, squamous, and cuboidal. "Oval" is not a recognized shape for epithelial cells.

Question 6

Which type of connective tissue is found between the ribs and the sternum, or supporting the trachea?

Accepted Answer

Hyaline cartilage is the type of connective tissue found between the ribs and the sternum, and it also supports the trachea. It provides flexibility and support in these areas.

Question 7

Epithelial cells exhibit modifications that adapt them for

Accepted Answer

Epithelial cells are specialized for secretion, among other functions, as they form glands and line surfaces where secretion occurs, such as in the digestive tract and respiratory system.

Question 8

The junction type that lets neighboring cells exchange small molecules is the

Accepted Answer

Gap junctions allow neighboring cells to exchange small molecules and ions directly through channels.

Question 9

Secretions through a duct might provide _____, whereas ductless secretions act as ____.

Accepted Answer

Secretions through a duct, such as those from exocrine glands, often include enzymes that aid in digestion or other processes. Ductless secretions, from endocrine glands, release hormones directly into the bloodstream to regulate various body functions.

Question 10

Simple cuboidal epithelium is found

Accepted Answer

Simple cuboidal epithelium is typically found in areas where secretion and absorption occur, such as the kidney tubules.

Question 11

Antibodies are produced by

Accepted Answer

Plasmocytes, also known as plasma cells, are the cells responsible for producing antibodies.

Question 12

What type of cell makes up almost half the volume of blood?

Accepted Answer

Erythrocytes, or red blood cells, make up almost half the volume of blood and are responsible for carrying oxygen throughout the body.

Question 13

Microscopic examination of a tissue reveals a loose framework of fibers embedded in a large volume of fluid ground substance and adipocytes and mast cells fibers. This tissue would most likely have come from the

Accepted Answer

The description matches areolar connective tissue, which is found in the superficial fascia between skin and muscle, characterized by a loose arrangement of fibers, ground substance, and various cell types like adipocytes and mast cells.

Question 14

Watery perspiration is an example of an)________ secretion.

Accepted Answer

Watery perspiration is an example of merocrine secretion, where the sweat glands release their product via exocytosis without losing any part of the cell.

Question 15

Transitional epithelium is found

Accepted Answer

Transitional epithelium is found lining the urinary bladder because it is able to stretch and contract to accommodate changes in the volume of urine in the bladder.

Question 16

Which of the following membranes line cavities that communicate with the exterior of the body?

Accepted Answer

Mucous membranes line cavities that open to the exterior, such as the respiratory, digestive, and urogenital tracts.

Question 17

Tissue that is specialized for contraction is _____ tissue.

Accepted Answer

Muscle tissue is specialized for contraction.

Question 18

The reduction of friction between the parietal and visceral surfaces of an internal cavity is the function of

Accepted Answer

Serous membranes secrete a lubricating fluid that reduces friction between the parietal and visceral surfaces of internal cavities.

Question 19

Tissues that provide strength and support for areas subjected to stresses from many directions are

Accepted Answer

Dense irregular connective tissues provide strength and support in areas subjected to stresses from multiple directions due to their irregularly arranged collagen fibers.

Question 20

Unicellular exocrine glands secrete

Accepted Answer

Unicellular exocrine glands, such as goblet cells, primarily secrete mucus.

Quiz 4: The Tissue Level of Organization