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PSIO 303 EXAM 1 STUDY GUIDE WITH COMPLETE SOLUTIONS

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  • PSIO 303

©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM 2 Body temperature, blood pH, tissue oxygenation, cell size, cytoplasmic composition Cell Theory - Answer️️ -All living things are made up of cells the cell is a structural and functional unit of all living things All cells come...

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  • August 28, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • PSIO 303
  • PSIO 303
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©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM



PSIO 303 EXAM 1 STUDY GUIDE WITH
COMPLETE SOLUTIONS

Mitochondria - Answer✔️✔️-making ATP by breaking down sugar

plasma membrane (cell membrane) - Answer✔️✔️--Provides
protection and a fixed environment for the cell



-Transports nutrients into the cell and transports toxic substance
outside of the cell

Nucleus - Answer✔️✔️-Protecting, controlling access to DNA

Golgi - Answer✔️✔️-Modifying polypeptide chains; sorting, shipping
proteins and lipids

Ribosomes - Answer✔️✔️-Assembling polypeptide chains

Lysosomes - Answer✔️✔️-Intracellular digestion; break down excess/
worn out cell parts or viruses & bacteria

Peroxisomes - Answer✔️✔️-Neutralization of toxins

Homeostasis - Answer✔️✔️-self regulating process by which biological
systems maintain stability by adjusting

to changing external conditions




1

, ©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM


Body temperature, blood pH, tissue oxygenation, cell size,
cytoplasmic composition

Cell Theory - Answer✔️✔️-All living things are made up of cells



the cell is a structural and functional unit of all living things



All cells come from pre-existing cells



Cells contain hereditary information which is passed from cell to
cell during division



All cells are basically the same in chemical composition



All energy flow of life occur within cells

Needs for cells to communicate - Answer✔️✔️-Sense and respond to
other cells



Coordinate actions



Develop specialized functions (muscles, nerve, leukocytes)




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, ©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM


Modes of cellular communication - Answer✔️✔️-Endocrine: cell in
one part of the body sends signal

(hormone) to distant target cells



Paracrine: cell-cell communication



Autocrine: cell stimulates itself

Common cell structures called organelles are either membrane
bound or non membrane bound. Choose the following list that
contains only membrane bound organelles. - Answer✔️✔️-nucleus,
endoplasmic reticulum, lysosome, mitochondrion

When plasma glucose concentration increases, cells in the pancreas
release insulin. Insulin causes a pattern of responses that
decreases glucose concentration. This is an example of - Answer✔️✔️-
Homeostasis maintained by a negative feedback loop

What is your best estimate for the diameter of a pancreatic beta
cell? - Answer✔️✔️-10 microns

Describe the structure of the plasma membrane (PM) - Answer✔️✔️-
Phospholipid bilayer: in an aqueous environment:

Polar (hydrophilic) head groups orient TOWARD polar water

Nonpolar (hydrophobic) tail groups orient AWAY from water

Forms phospholipid bilayer which is the structure of the PM


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