Biol 252 - Study guides, Class notes & Summaries
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BIOL 252 Exam 1 Apply What You Learned Questions & Answers!!
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What do you think would happen if the elastic fibers in tissues were distensible but not elastic? - ANSWER This would cause the tissues to be unable to resume their original shape and size once the stretching forces were removed. 
 
Predict what would happen if the tight junctions in blood vessels were not functional. - ANSWER Tight junctions make the spaces between the cells relatively impermeable to water and many solutes. Nonfunctional tight junctions in blood vessels would allow much of the ...
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Biol 252 Exam 4 Latest Update 100%
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what nervous system does the digestive system use - ANSWER Enteric Nervous System 
 
what covers the digestive tract - ANSWER internal lumen 
 
Ingestion - ANSWER Taking food in 
 
Propulsion - ANSWER Moving through GI tract 
 
Digestion - ANSWER mechanical and chemical break down of food 
 
Absorption - ANSWER Passing end products from lumen to blood and lymph 
 
Tissue of lumen - ANSWER 1. Mucosa 
2. Submucosa 
3. Muscularis externa 
4. Serosa 
 
Smooth Muscle layers of the stomach - ANSWER 1....
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exam 3 biol 252 Correct Questions & Answers(RATED A)
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cardiocytes - ANSWER contractile cells of the heart 
 
desmosomes - ANSWER attach cardiocytes together. When one cell contracts, the other will not separate. Think of them like glue between the cells. 
Connected via gap junctions 
Electrical and chemical coupling 
The heart muscle acts as a single functional unit 
 
If you had designed a heart, in which the heart muscle cells can contract in unison, what would you do? - ANSWER Innervate only a few muscle cells and have them attach to each other...
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BIOL 252 Exam 2- Endocrine, Skeletal, Muscular 100% Accurate
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How are the amino acid-based and the steroid hormones different from each other (e.g. chemical properties; transport in the blood; interactions with target cells)? - ANSWER Amino acid hormones: water soluble, unbound in blood, short duration effect, needs second messenger to send signal to nucleus for transcription 
 
Steroid hormones: lipid soluble, bound in blood to protein carriers for transport, prolonged effect 
 
I gave one example of a second messenger in the voicethread. Try to find ano...
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Biol 252 Shemer Exam 2 Latest Update 2024
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Melatonin is a hormone secreted by the pineal gland. It is both lipid and water-soluble. Knowing that gene X transcription is repressed in response to melatonin secretion, we can safely assume that: - ANSWER We cannot tell which receptor binds to melatonin, as both membrane-bound and intracellular can lead to repression 
 
What is the body's second great controlling system? - ANSWER The endocrine system 
 
What is the endocrine system composed of? - ANSWER Endocrine glands 
 
How does the endoc...
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BIOL 252 Exam 2|| 105 Questions|| Correct 100%
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Epimysium - ANSWER Connective tissue layer surrounding muscle organ 
 
Fasicles - ANSWER Muscular subunits that contain muscle cells. Coated by parimysium 
 
Muscle Cell - ANSWER Coated by endomysium 
 
Sarcolemma - ANSWER muscle cell cytoplasm 
 
Unique characteristics of muscle cells - ANSWER High concentration of mitochondria, multiple nuclei, sarcoplasmic reticulum, t-tubules, and myofibrils 
 
Sarcoplasmic Reticulum - ANSWER ER that covers the myofibrils
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BiOL 252 Exam 1 Correct 100%
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astrocytes - ANSWER support and brace neurons and blood vessels, regulate ECF environment of CNS, formation of blood brain barrier, and repair damaged brain tissue 
 
oligodendrocytes - ANSWER insulator of CNS neurons- myelinates neurons 
 
microglia - ANSWER "immune cells" of CNS; clean up environment acting as wandering phagocytes 
 
ependymal cells - ANSWER ciliated epithelial cells that circulate cerebrospinal fluid 
 
schwann cells - ANSWER myelinate neurons of the PNS and repair damaged ...
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BIOL 252 Exam 2- Endocrine, Skeletal, Muscular Rated 100% Correct!!
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How are the amino acid-based and the steroid hormones different from each other (e.g. chemical 
properties; transport in the blood; interactions with target cells)? - Amino acid hormones: water 
soluble, unbound in blood, short duration effect, needs second messenger to send signal to nucleus for 
transcription 
Steroid hormones: lipid soluble, bound in blood to protein carriers for transport, prolonged effect 
I gave one example of a second messenger in the voicethread. Try to find another exam...
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BIOL 252 Exam 1|| 155 Questions|| Correct Answers|| RATED A
- Exam (elaborations) • 11 pages • 2024
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Function follows _____________ - ANSWER Form 
 
Afferent = - ANSWER Sensory 
 
Efferent = - ANSWER Motor 
 
Two divisions of the sensory nervous system: - ANSWER Somatic and visceral 
 
What does the somatic nervous system control? - ANSWER skin, skeletal muscles, joints 
 
What does the visceral nervous system control? - ANSWER smooth muscle, cardiac muscle, glands, organs 
 
two divisions of motor division - ANSWER somatic nervous system and autonomic nervous system 
 
T/F: As the stomach expa...
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BIOL 252 Exam 2 (100% correct and graded A+)
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chondrocytes - found in healthy cartilage; make up the matrix; facilitate the exchange of fluids 
through gelatinous layers; not capable of cell division 
tension - stretching of the muscle that are resisted by collagen fibers; aka pulling forces 
compression - pushing the bones toward the middle, resisted by cartilage 
torsion - twisting stress put on bones; collagen fibers provide resistance to it as a unit 
diaphysis - middle part or shaft of a bone 
epiphysis - head or end of a bone 
epiphys...
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