mitochondria correct answers -powerhouse
-generates ATP
-self-replicate during times of increased cellular demand or before cell division
-contain own DNA
nucleolus correct answers spherical body that produces ribosomes
chromosomes correct answers long molecules of DNA combined with protei...
Bio 240--Exam 1 || A+ GRADED
mitochondria correct answers -powerhouse
-generates ATP
-self-replicate during times of increased cellular demand or before cell division
-contain own DNA
nucleolus correct answers spherical body that produces ribosomes
chromosomes correct answers long molecules of DNA combined with protein molecules
nuclear envelope correct answers -a double membrane that separates the nucleus from the
cytoplasm
-has pores that allow transport in and out
peroxisomes correct answers -smaller than lysosomes
-detoxify several toxic substances such as alcohol
-abundant in liver
lysosomes correct answers vesicles that form from the Golgi complex and contain powerful
digestive enzymes
golgi complex correct answers -consists of 3-20 flattened, membranous sacs called cisternae
-modify, sort, and package proteins for transport to different destinations
-proteins are transported by various vesicles
endoplasmic reticulum correct answers network of membranes in the shape of flattened sacs
or tubules
rough er correct answers surface is studded with ribosomes important for protein synthesis
smooth er correct answers lacks ribosomes, **synthesizes fatty acids and steroids, detoxifies
certain drugs
cilia correct answers short, hair-like projections from the cell surface, move fluids along a
cell surface
flagella correct answers longer than cilia, move an entire cell; sperm cell's tail
centrosome correct answers -located near the nucleus, consists of two centrioles
-role in cell division--grow mitotic spindle fibers
muscle correct answers this tissue generates the physical force needed to make body
structures move. they also generate heat used by the body.
nervous correct answers this tissue changes in the body and respond by generating nerve
impulses
connective correct answers this tissue protects, supports, and binds organs and collagen is the
main protein
, -fat
-rbc, wbc, and platelets
epithelial correct answers this tissue covers body surfaces and forms glands and lines hollow
organs, body cavities, and ducts
gap junction correct answers are pores (connexons) that allow small substances like ions to
pass between cells
-allow for cell communication in the heart
hemidesmosomes correct answers are half-welds that join cells to the basement membrane
desmosomes correct answers used cadherin glycoprotein (plus intermediate filaments) to
hook into the cytoplasm
-skin
adherens junctions correct answers make an adhesion belt that keeps tissues from separating
as they stretch and contract
tight junctions correct answers are found where a leakproof seal is needed between cells
-bladder
simple squamous epithelium correct answers is composed of a single layer of flat cells:
-air sacs of lungs
-lining of blood vessels, the heart, and lymphatic vessels
-all capillaries, including those of the kidney
**diffusion and gas exchange
simple cuboidal epithelium correct answers is composed of a single layer of cube shaped cells
-tubules of the kidneys and many other glands
**secretion
simple columnar epithelium correct answers forms a single layer of column-like cells +/-
cilia, +/- microvilli, +/- mucous (goblet cells).
-digestive organs
pseudostratified columnar epithelium correct answers appears to have layers, due to nuclei
which are various depths. in reality, all cells are attached to the basement membrane.
-trachea
**ciliated tissue has goblet cells that secrete mucous
-upper respiratory tract
stratified squamous epithelium correct answers has an apical surface that is made up of
squamous cells
-vaginal canal--sex, birthing
-skin
-inner cheek
**the many layers are ideal for protection against strong friction forces
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