Biology: Cell Theory Flashcards
An organism’s ability to keep a
constant internal state is called
Homeostasis.
Maintenance of these conditions is
important because most cells of an
organism require a specific set of
conditions to function normally.
Regulation of the Internal Environment
○ It is stored in the bonds present in food
molecules, and it will be converted by
the cells into more usable forms.
○ Energy is needed by various cells to
perform their functions.
○ Heart cells to pump blood
○ Intestinal Cells to digest food
○ Skeletal Cells to initiate motion
Acquisition and Utilization of Energy
○ A cell must first be able to determine
the changes that have taken place
before deciding the necessary
responses that will ultimately result in
the maintenance of normal internal
conditions.
Responsiveness to Their Environment
○ A cell must first be able to determine
the changes that have taken place
before deciding the necessary
responses that will ultimately result in
the maintenance of normal internal
conditions.
Responsiveness to Their Environment
○ A cell must first be able to determine
the changes that have taken place
before deciding the necessary
responses that will ultimately result in
the maintenance of normal internal
conditions.
Responsiveness to Their Environment
Immune cells impart protection against
pathogens and other foreign bodies
that may enter the general circulation.
Protection and Support
C. HISTORY OF THE DEVELOPMENT
OF THE CELL THEORY
○ Invented the first primitive microscope.
○ Made of copper metal.
Zacharias Janssen (1585-1632)
○ Disproved the spontaneous generation
theory.
Francesco Redi (1626-1697)
○ Observed microorganisms by using his
own practical microscope.
Anton Van Leeuwenhoek (1632-1723)
○ Observed microorganisms by using his
own practical microscope.
Anton Van Leeuwenhoek (1632-1723)
○ Coined the term “cell”
○ Observed cork cells under a
microscope.
○ He looked at the cork plant samples
through an early compound
microscope.
Robert Hooke (1635-1703)
○ German Botanist
○ Proposed that all plants are composed
of cells.
Matthias Jakob Schleiden (1804-1881)
○ German Zoologist
○ Proposed that all animals are
composed of cells.
Theodor Schwann (1810-1882)
D. THE THREE PRINCIPLES OF THE
CELL THEORY
Every living organism consists of one or
more cells. Organisms may be _______
or ________ based on their level of
complexity.
● The —- is the fundamental unit of life. It is
the smallest structural and functional unit
in all organisms.
● Cells come from pre-existing cells. Cells
contain hereditary material, which they
pass to their daughter cells when they
divide.
● unicellular and multicellular
●cell
● Cells come from pre-existing cells. Cells
contain hereditary material, which they
pass to their daughter cells when they
divide.
● unicellular and multicellular
●cell
● Cells come from pre-existing cells. Cells
contain hereditary material, which they
pass to their daughter cells when they
divide.
