BIOS 1300 exam 2 (100% Correct)
histology correct answers study of tissues and how they are arranged in organs
cell junctions correct answers connections between two cells
tight junctions correct answers good for tissues that act as barriers
desmosome correct answers very strong and help tissues resist stretching
gap junction correct answers fairly weak, but great for allowing cells to communicate quickly
tight junctions correct answers linkage between two adjacent cells by transmembrane cell-
adhesion proteins and makes it difficult for substances to pass
example of a tight junction correct answers blood-brain barrier
hemidesmosomes correct answers half desmosomes that anchor basal cells of an epithelium to
underlying basement membrane
pemphigus vulgaris correct answers Destruction of desmosomes by own antibodies (autoimmune
disorder)
gap junctions are formed by correct answers connexons
where are gap junctions located correct answers located in cardiac and smooth muscle,
embryonic tissue
3 steps in gap junction pathology correct answers defects in protein trafficking/assembly,
mutations in gap junction molecules, improper/unregulated exchange of cellular contents
glands correct answers cell or organ that secrets substances for use elsewhere in the body or
releases them for elimination from the body
secretion correct answers product useful to the body
excretion correct answers waste product
exocrine glands correct answers maintain their contact with surface of epithelium by way of a
duct
external exocrine glands correct answers sweat and tear glands
internal exocrine glands correct answers pancreas and salivary glands
endocrine glands correct answers have no ducts; secret hormones directly into blood
, hormones correct answers chemical messengers that stimulate cells elsewhere in the body
examples of endocrine glands correct answers thyroid, adrenal, pituitary glands
organs that have both endocrine and exocrine functions correct answers liver, pancreas
unicellular glands correct answers found in an epithelium that is predominantly non secretory
capsule correct answers connective tissue covering of exocrine gland
septa or trabeculae correct answers extensions of capsule that divide interior of gland into
compartments (lobes and lobules
stroma correct answers connective tissue framework that supports and organizes glandular tissue
parenchyma correct answers cells that preform the tasks of synthesis and secretion
tubular correct answers narrow secretory portion
acinar correct answers secretory cells form dilated sac
tubuloacinar correct answers both tubular and acinar portions
3 modes of secretion correct answers merocrine, apocrine, holocrine
merocrine secretion correct answers uses vesicles that release secretion by exocytosis
apocrine secretion correct answers lipid droplet covered by membrane and cytoplasm buds from
cell surface
holocrine secretion correct answers cells accumulate a product until they disintegrate
what lines blood vessels and heart correct answers endothelium
what lines body cavities like pericardium, peritoneum, pleura correct answers mesothelium
tissue growth correct answers increasing the number of cells or size of existing cells
hyperplasia correct answers growth through cell multiplication
hypertrophy correct answers enlargement of preexisting cells
examples of hypertrophy correct answers muscle growth through exercise; accumulation of body
fat
histology correct answers study of tissues and how they are arranged in organs
cell junctions correct answers connections between two cells
tight junctions correct answers good for tissues that act as barriers
desmosome correct answers very strong and help tissues resist stretching
gap junction correct answers fairly weak, but great for allowing cells to communicate quickly
tight junctions correct answers linkage between two adjacent cells by transmembrane cell-
adhesion proteins and makes it difficult for substances to pass
example of a tight junction correct answers blood-brain barrier
hemidesmosomes correct answers half desmosomes that anchor basal cells of an epithelium to
underlying basement membrane
pemphigus vulgaris correct answers Destruction of desmosomes by own antibodies (autoimmune
disorder)
gap junctions are formed by correct answers connexons
where are gap junctions located correct answers located in cardiac and smooth muscle,
embryonic tissue
3 steps in gap junction pathology correct answers defects in protein trafficking/assembly,
mutations in gap junction molecules, improper/unregulated exchange of cellular contents
glands correct answers cell or organ that secrets substances for use elsewhere in the body or
releases them for elimination from the body
secretion correct answers product useful to the body
excretion correct answers waste product
exocrine glands correct answers maintain their contact with surface of epithelium by way of a
duct
external exocrine glands correct answers sweat and tear glands
internal exocrine glands correct answers pancreas and salivary glands
endocrine glands correct answers have no ducts; secret hormones directly into blood
, hormones correct answers chemical messengers that stimulate cells elsewhere in the body
examples of endocrine glands correct answers thyroid, adrenal, pituitary glands
organs that have both endocrine and exocrine functions correct answers liver, pancreas
unicellular glands correct answers found in an epithelium that is predominantly non secretory
capsule correct answers connective tissue covering of exocrine gland
septa or trabeculae correct answers extensions of capsule that divide interior of gland into
compartments (lobes and lobules
stroma correct answers connective tissue framework that supports and organizes glandular tissue
parenchyma correct answers cells that preform the tasks of synthesis and secretion
tubular correct answers narrow secretory portion
acinar correct answers secretory cells form dilated sac
tubuloacinar correct answers both tubular and acinar portions
3 modes of secretion correct answers merocrine, apocrine, holocrine
merocrine secretion correct answers uses vesicles that release secretion by exocytosis
apocrine secretion correct answers lipid droplet covered by membrane and cytoplasm buds from
cell surface
holocrine secretion correct answers cells accumulate a product until they disintegrate
what lines blood vessels and heart correct answers endothelium
what lines body cavities like pericardium, peritoneum, pleura correct answers mesothelium
tissue growth correct answers increasing the number of cells or size of existing cells
hyperplasia correct answers growth through cell multiplication
hypertrophy correct answers enlargement of preexisting cells
examples of hypertrophy correct answers muscle growth through exercise; accumulation of body
fat
