Exam (elaborations)
Bio 141 PSU Exam 1.
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Exam of 6 pages for the course BIO 141 F at BIO 141 F (Bio 141 PSU Exam 1.)
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Bio 141 PSU Exam 1Homeostasis - CORRECT ANSWER-the body's ability to maintain a constant
environment, the body can detect change and respond
Physiology - CORRECT ANSWER-mechanisms to maintain homeostasis
Negative Feedback Loop - CORRECT ANSWER-body senses change and
reacts to negate or reverse the condition
Positive Feedback Loop - CORRECT ANSWER-self-amplifying cycle in which an
INITIAL change leads to a greater change and so on...
Carbohydrates - CORRECT ANSWER-functions as energy, structure, cell identity
Triglycerides - CORRECT ANSWER-type of lipid, functions as energy storage,
insulation, cushions organs
Phospholipids - CORRECT ANSWER-type of lipid, cell membranes
Steriods - CORRECT ANSWER-type of less common lipid, cell membranes and
hormones
Saturated Fats - CORRECT ANSWER-found in meat and dairy products, all
single bonds
Unsaturated Fats - CORRECT ANSWER-found in plant oil, fish, and avocados,
contains single, double, and triple bonds
Proteins - CORRECT ANSWER-polymer of amino acids, functions as structure,
communication,
Amino acids - CORRECT ANSWER-20 different types, joined by peptide bonds
to make proteins
Nucleic Acids - CORRECT ANSWER-function in energy transport (ATP),
hereditary material (DNA), and protein synthesis (RNA)
, Nucleotides - CORRECT ANSWER-Adenine, Thymine, Guanine, and Cytosine
Anabolism - CORRECT ANSWER-enzymes that make molecules
Catabolism - CORRECT ANSWER-enzymes that break molecules
Transcription - CORRECT ANSWER-make a working copy of the gene
Translation - CORRECT ANSWER-translate the nucleotides to amino acids
Cytoplasm - CORRECT ANSWER-fluid inside the cell
Nucleus - CORRECT ANSWER-location of DNA, production from RNA
Endoplasmic Reticulum - CORRECT ANSWER-location of translation (protein
synthesis)
Golgi Bodies - CORRECT ANSWER-stacks of membranes, packages proteins
for transport in membrane bubbles called vesicles
Mitochondria - CORRECT ANSWER-production of ATP
Cytoskeleton - CORRECT ANSWER-network of proteins in the cytoplasm,
function: structural support, tracks for transport of vesicles and organelles
Plasma Membrane - CORRECT ANSWER-made of phospholipids and
cholesterol, is selectively permeable
Passive Transport - CORRECT ANSWER-does not require energy
Diffusion - CORRECT ANSWER-spontaneous movement of particles from high
to low concentration
Leak Channels - CORRECT ANSWER-Channel-mediated, open all the time
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