SLCC 2420 Physiology FINAL Questions With Complete Solutions
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Course
SLCC
Institution
SLCC
SLCC 2420 Physiology FINAL Questions
With Complete Solutions
Homeostasis and how it is maintained Negative feedback
Negative feedback and positive feedback *Negative* = Main mechanism used to maintain
homeostasis.
Acts opposite of variable to return body to homeostasis.
*Positive* = Respons...
*Nucleic Acids*- Polymers of nucleotides / DNA, RNA, Storage and expression of genetic
information
Cell structure: plasma membrane, nucleus, and organelles -Phospholipid bilayer,
selectively permeable, fluid mosaic model (moveable)
-Nucleus contains genetic information
Cell-to-cell adhesions: Tight junctions, Gap junctions, Desmosomes
Tight junctions - Impermeable barrier between epithelial cells lining lumens
- Solutes can only go through the cells but not around them
Gap junctions - Channels that allow cells to communicate or exchange nutrients
Ex. Cardiac muscle, smooth muscle, bone, some neurons
Desmosomes - Keeps tissues from tearing apart when mechanically
, SLCC 2420 Physiology FINAL Questions
With Complete Solutions
stressed. (Like a spot weld)
- Found in skin, heart, uterus
CH. 3/21 Anabolic versus catabolic reactions Anabolic = Involves the production of larger
molecules from smaller reactants.
Catabolic = Involves breakdown of larger molecules into smaller ones.
Endergonic versus exergonic reactions Endergonic = Requires energy
Exergonic = Releases energy
Types of chemical reactions: 1. Hydrolysis and condensation reactions
2. Phosphorylation and dephospho rylation reactions
3. Oxidation-reduction reactions
Hydrolysis and condensation reactions *Hydrolysis* - Water reacts with molecules,
breaking the bonds that link a molecule together.
*Condensation* - Reverse of Hydrolysis; Joining together two or more smaller molecules to
form a larger one.
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