Match the organelle with its characteristic: Golgi apparatus.
A)Generates microtubules and organizes the mitotic spindle
B)Possesses a cis and trans side; composed of cisternae
C)Cristae; matrix
D)Composed of microtubules arranged in nine groups of three
E)Composed of two subunits; can be "free" in the cytosol or attached to rough ER
B)Possesses a cis and trans side; composed of cisternae
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Presynaptic neurons release neurotransmitters by ________.
A. diffusion B. exocytosis C. active transport D. endocytosis
What types of cells are located in area C in the figure?
a) B cells and follicular dendritic cells b) B cells and plasma cells c) macrophages and B cells d) T cells and dendritic cells e) plasma cells and macrophages
An adaptation of the epithelial cells of the proximal convoluted tubule for reabsorption is
A) secreting enzymes that activate absorption of substances. B) rugae folds that increase surface area. C) microscopic projections called microvilli. D) thin walls.
Channels that open or close in response to changes in the electrical charge or voltage across the plasma membrane are called
A. ligand-gated ion channels. B. leak ion channels. C. relegated ion channels. D. voltage-gated ion channels. E. obligated ion channels.