PHYSIOLOGY I *FINAL || Exam 2026
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Anatomy - ANSWERS-the study of body structure and how they are related to one
another.
Physiology - ANSWERS-the study of body function; how the body parts work and
perform life-sustaining functions.
Transverse Plane - ANSWERS-also known as a cross-section; divides the body into
upper and lower halves.
Ventral cavity - ANSWERS-Consists of the thoracic, abdominal, and pelvic cavities;
contains all the internal organs, collectively called viscera.
,Serous Membrane - ANSWERS-lines organs and cavities on the closed internal part of
the body
Passive Transport - ANSWERS-the movement of substances across the cell membrane
without the use of energy
Diffusion - ANSWERS-Movement of molecules from an area of higher concentration to
an area of lower concentration, this will continue until an equilibrium is established.
Simple Diffusion - ANSWERS-a process by which fat soluble substances pass directly
through the phospholipid bilayer; substances include oxygen, carbon dioxide, steroid
hormones, and water.
Carrier-mediated facilitated diffusion - ANSWERS-happens via a protein carrier that is
specific to one chemical; it changes shape to move the binding site from one face of the
membrane to the other.
Channel-mediated facilitated diffusion - ANSWERS-happens via a channel protein,
mostly through ions that are selected on the basis of size and charge.
Osmosis - ANSWERS-the movement of a solvent (usually water) across the plasma
membrane. This process occurs when there is a difference in solvent concentration of
both sides of the membrane.
Tonicity - ANSWERS-refers to a solutions ability to change the shape of a cell, by
changing the internal water volume.
Hypotonic solution - ANSWERS-considered to be dilute/weak since solute concentration
inside the cell is much higher than the solute concentration outside of the cell.
Cells present in these solutions will take on water and may eventually burst.
, Hypertonic solution - ANSWERS-considered to be more-so concentrated since the
solute concentration inside the cell is lower than the solute concentration outside the
cell.
Cells present in these solutions will lose water and will shrink.
Isotonic Solution - ANSWERS-considered to be neutral since the flow of solute in and
out of the cell is equal
Cells present in these solutions will remain the same and will retain their normal shape
and size.
Endocytosis - ANSWERS-used by cells to bring in macromolecules, usually relies on
receptors in the membrane to determine which substances will be brought into the cell.
Phagocytosis - ANSWERS-a process through which a cell engulfs relatively large/solid
materials into a sac called the phagosome, which are ultimately ingested by the cell.
Pinocytosis - ANSWERS-a process through which a cell gulps a droplet of extracellular
fluid (which contain solute) into tiny vesicles, it is then used to transport nutrients into
the cell
Receptor-mediated endocytosis - ANSWERS-a process by which extracellular
substances bind to receptor proteins which enables the cell to release the contents into
the cell or digest them into a lysosome; many viruses, enzymes, and insulin enter the
cell this way.
Vesicular Trafficking - ANSWERS-the movement of a substance from one area of the
cell to another area of the cell.
Interphase - ANSWERS-the growth phase; refers to the period from cell formation to
cell division.
Cell Divison - ANSWERS-the division of a cell into two daughter cells with the same
genetic material.