Download Cytology

Cytology
Biochemistry – Chap. 2
Cell Biology – Chap. 3
Learner Outcomes:
• To describe the characteristics and identify the
monomers of lipids, proteins, carbohydrates, and nucleic
acids and to define their role in biochemical processes.
• To analyze and explain the chemical reactions the
provide energy for the body.
• To investigate and describe the integration of the
chemical and physical properties that contribute to
homeostasis in cells.
• To compare the structures and functions of organelles
within cells of the body.
• To describe the processes involved in the cell cycle.
Eukaryotic Cells
• With the exception of symbiotic and
parasitic relationships with bacteria, all of
the cells of our body are eukaryotic.
• What does this mean?
Eukaryotic Cells
• Plasma membrane
• Nucleus and Nucleolus
• Cytoplasm containing organelles
• Each of our bodies exhibits specialization.
The presence or absence of some
organelles and their arrangements vary
dependant on the needs of the cell.
Fig. 3.2
Cellular Homeostasis – the plasma
membrane
• Semi-permeable or Selectively permeable
• 2 methods used in crossing the membrane –
active and passive
• Active transport requires the use of ATP. Which
organelle provides this high-powered molecule
for the cell?
• Passive transport uses the principles of diffusion
to cross the membrane and does not require the
use of ATP.