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EXSC 223 Exam 1 Questions and Answer 100% Solved | Graded A+
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EXSC 223 Exam 1 Questions and Answer 100% Solved | Graded A+ Principle of Complementarity - form determines function anatomy determines the physiology that can take place Physiology uses Gradients - body takes advantage of gradients can be natural or at expenditure of energy Regulate protein ...

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  • December 23, 2024
  • 27
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • exsc 223

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  • EXSC 223
  • EXSC 223

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EXSC 223 Exam 1 Questions and

Answer 100% Solved | Graded A+


Principle of Complementarity - ✔✔form determines function

anatomy determines the physiology that can take place

Physiology uses Gradients - ✔✔body takes advantage of gradients

can be natural or at expenditure of energy

Regulate protein functions by regulating its shape - ✔✔tagging

(phosphorylation) changes shape -> function

can be subtle or drastic

Negative feedback regulation is essential to homeostasis - ✔✔homeostasis

:normal/baseline/reference point

negative feedback loops allow us to restore homeostasis

What are the three principles of the cell theory? - ✔✔1) Cell is the basic

structure & functional unit of living organisms

2) Principal of complementary -> specific suocelular structures dictate

biochemical activities -> organelles in cells show functions of cells

3) continuity of life has similar basis -> meiosis & mitosis

1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

,Three structural/functional relationships of eukaryotic cells - ✔✔nucleus

(except red blood cells)

cytoplasm

plasma membrane

cytosol - ✔✔intracellular fluid

cytoskeletal elements - ✔✔microtubule

intermediate filaments

centrioles - ✔✔where microtubules come from

direct formation of mitotic spinal

chromatin - ✔✔DNA in loosely organized state

ribosomes - ✔✔read mRNA and convert to protein

can be free or bound

lysosomes - ✔✔break things down w/ digestive enzymes

peroxisome - ✔✔contain hdroperoxide -> kill cells

What do cells do all day while you're working? - ✔✔segregate (separate

internal from external)

transport & digest ( membrane trafficking)

identify alien invaders ( distinguish self from non self)

internal support

2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, hold hands (cell to cell adhesion)

communicate (between cells)

build/remodel/demolish

clone

Plasma Membrane - ✔✔fluid mosaic model ( flexible like vegetable oil)

phospholipid bilayer ( fat molecule w/ head and tail)

- polar head -> hydrophilic -> containes phosphate

- nonpolar tail -> hydrophobic - > containes fatty acids

SELF ASSEMBLING

cholestoral -> mixed between nonpolar tails - > stiffens membrane ->

decreases water solubility of membrane

made up of CH groups

ampipathic molecule

no charge

glycolipids -> exposed on extracellular side

selectively permiable

Plasma Membrane structure - ✔✔2 fatty acid chains with a phosphate

group and glycerol backbone

What is an amphipathic molecule? - ✔✔a molecule that can interface

between water and lipid
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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