11) In which type of cell junction two cells held : 1200447.
11) In which type of cell junction are two cells held together by embedded membrane proteins called connexons?
A) spot desmosome
B) gap junction
C) tight junction
D) hemidesmosome
E) CAM
12) What is the primary function of the structure above?
A) prevent diffusion of solutes and fluids between the cells
B) attach cells to extracellular structures
C) permit the free diffusion of ions and small molecules between two cells
D) storage of energy reserves
E) provide an efficient means of moving dissolved materials from one region of the body to another
13) Which of the following is a term used to describe the number of layers of epithelial cells?
A) transitional
B) squamous
C) cuboidal
D) columnar
E) stratified
14) Which type of epithelium lines the stomach and intestinal tract?
A) transitional
B) simple columnar
C) stratified squamous
D) simple cuboidal
E) pseudostratified ciliated
15) Which of the following is a type of secretion in which cells become packed with secretions and then burst apart and die?
A) holocrine
B) merocrine
C) apocrine
D) mucous
E) ceruminous
16) Exocrine secretions are discharged onto some external or internal body surface through a(n) ________.
A) flagellum
B) cilium
C) plasma membrane
D) duct
E) microvillus
17) Secretions that are discharged directly into the blood are characteristic of ________ glands.
A) exocrine
B) merocrine
C) endocrine
D) apocrine
E) holocrine
18) Which type of epithelium secretes enzymes and buffers in the pancreas and salivary glands?
A) simple squamous
B) stratified squamous
C) transitional epithelium
D) pseudostratified columnar epithelium
E) simple cuboidal
19) Which epithelium has nuclei crowded into a narrow band close to the basement membrane?
A) stratified squamous epithelium
B) columnar epithelium
C) transitional epithelium
D) simple squamous epithelium
E) transitional epithelium
20) Which of the following accounts for most of the volume of connective tissues?
A) blood vessels
B) lipid molecules
C) carbohydrates
D) cells
E) extracellular matrix
