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BIOLOGY 1161 (Lecture Exam 2) (92 questions with complete verified solutions) $15.99   Add to cart

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BIOLOGY 1161 (Lecture Exam 2) (92 questions with complete verified solutions)

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  • Biology 1161 lsua
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  • Biology 1161 Lsua

BIOLOGY 1161 (Lecture Exam 2) (92 questions with complete verified solutions)

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  • August 17, 2024
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  • 2024/2025
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  • Biology 1161 lsua
  • Biology 1161 lsua
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BRAINBOOSTERS
BIOLOGY 1161
(Lecture Exam 2)
(92 questions
with complete
verified
solutions)
Major parts of a generalized cell - answer Plasma
membrane, nucleus and cytoplasm


Plasma Membrane - answer Outer barrier of the cell;
selectively permeable.


cytoplasm - answer intracellular fluid packed with
organelles, small structures that perform specific cell
functions


nucleus - answer Control center of the cell

, 3 types of membrane junctions - answer tight junctions,
desmosomes, gap junctions


tight junctions - answer integral proteins from adjacent
membranes fuse together; prevents molecules from
passing through the extra-cellular space between cells;
leaky enough to allow certain ions to pass


Desmosomes - answer Anchoring junctions that prevent
cells from being pulled apart


gap junctions - answer (communicating junctions) provide
cytoplasmic channels between adjacent cells


types of lipids found in the plasma membrane - answer
phospholipids and cholesterol


phospholipids - answer has a hydrophilic head and
hydrophobic tail, they move freely side to side.


Cholesterol - answer has a polar region and non polar
region, wedge between phospholipid tails to stiffen the
membrane.


passive processes - answer substances cross the
membrane without any energy input from the cell

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