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EXSC 223 Exam 1 Dr. Thompson Questions and Answers 100% Solved | Graded A+
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EXSC 223 Exam 1 Dr. Thompson Questions and Answers 100% Solved | Graded A+ 4 essential concepts in physiology - Principle of complementarity, uses gradients, regulates protein function by regulating its shape, and negative feedback is essential for homeostasis Principle of Complementarity - s...

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  • December 23, 2024
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  • 2024/2025
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EXSC 223 Exam 1 Dr. Thompson

Questions and Answers 100% Solved |

Graded A+


4 essential concepts in physiology - ✔✔Principle of complementarity, uses

gradients, regulates protein function by regulating its shape, and negative

feedback is essential for homeostasis

Principle of Complementarity - ✔✔structure determines function

physiology uses gradients - ✔✔Level/difference of two points; everything

moves high to low unless manufactured for vice versa

Regulates protein function by regulating its shape - ✔✔protein, made of

amino acids folded in certain shapes, the shapes determine what the

protein does; If the shape is altered so is the function

Negative feedback is essential to homeostasis - ✔✔homeostasis is

dynamic state; strive to achieve it; prevents us from exaggerated

responses that aren't helpful

Example of Negative feedback regulation - ✔✔sodium potassium pump


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,Example of physiology using gradients - ✔✔sodium potassium pump and

circulatory system

cell theory - ✔✔basic structure and functioning units of living organisms,

principle of complementarity, and continuity of life

Eukaryotes share what 3 major parts? - ✔✔nucleus, cytoplasm, and

plasma membrane

Cytoplasm is made up of - ✔✔fluid (cytosol) and organelles

Erythrocytes are shaped because - ✔✔They have no nucleus

Skeletal muscle - ✔✔long cylinder like tubes; long large cells

Smooth muscle - ✔✔small cells, can't see with naked eye

Cytoskeletal elements - ✔✔microfilaments, intermediate filaments,

microtubules

What cells do daily - ✔✔segregate, transport and digest, distinguish self

from non-self, support from cytoskeleton, cell to cell adhesion,

build/remodel/demolish, replicate

Key Elements of Plasma membrane - ✔✔very flexible, not super stable;

fluid mosaic model, and phospholipid bilayer




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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, fluid mosaic model - ✔✔proteins embedded in the membrane; gives the

membrane increased integrity/stability

phospholipids - ✔✔made up of glycerol bound to two fatty acids and a

phosphate group; interacts with water and fats

cholesterol in membrane - ✔✔embedded in the bilayer, works to stabilize

the membrane in hot/cold temps

How cholesterol is embedded in the membrane - ✔✔A region is hydrophilic

that lets its hide between the phospholipids

Temperature effects on cholesterol - ✔✔High temperature results in less

fluid like; low temperature makes it more fluid like/flexibile

What are glycolipids? - ✔✔phospholipids with sugar residues attached;

always on the extracellular side

Function of glycolipid in the membrane - ✔✔Sugars are hydrophilic, water

attracts to keep the cell wet

integral membrane proteins - ✔✔transmembrane, hydrophobic, and

hydrophilic regions; has many functions but some are channels and pores

peripheral proteins - ✔✔attached to integral proteins, aren't in the

membrane and can be on either cytosolic or interstitial side



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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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