Biomedical Science Exam 1
Study online at https://quizlet.com/_2fdpxq
1. What effect does Cholesterol disrupts the packing of the long phospholipid fatty acid chains and
the presence of therefore increases the fluidity of the membrane
cholesterol have
on the plasma
membrane?
2. Pinocytosis Cell drinking (comes into the cell)
extracellular fluid and soluble material
3. Receptor Mediat- • Receptors for many substances are located on the cell surface, they can be widely
ed Endocytosis I distributed or localized to specialized coated pits.
• Binding of ligands to receptors causes receptors to accumulate in coated pits.
• The cytoplasmic surface of the PM at these locations contain many proteins,
particularly clathrin. These proteins form a lattice meshwork.
• The coated pit invaginates and pinches off forming a coated vesicle which
contains the receptor plus the bound ligand.
• Coated vesicles lose their clathrin and fuse with endosomes. Clathrin detaches
and recycles back to the PM.
4. Properties of the contains cristae which increases the SA
mitochondria
matrix contains dna, tRNA, mRNA, and rRNA
very high protein to lipid ratio
new mitochondria arise by the fusion of existing mitochondria
responsible for the production of the cell's ATP and carries out most cellular
oxidation.
5. Endoplasmic cisterna
reticulum
1/4
Study online at https://quizlet.com/_2fdpxq
1. What effect does Cholesterol disrupts the packing of the long phospholipid fatty acid chains and
the presence of therefore increases the fluidity of the membrane
cholesterol have
on the plasma
membrane?
2. Pinocytosis Cell drinking (comes into the cell)
extracellular fluid and soluble material
3. Receptor Mediat- • Receptors for many substances are located on the cell surface, they can be widely
ed Endocytosis I distributed or localized to specialized coated pits.
• Binding of ligands to receptors causes receptors to accumulate in coated pits.
• The cytoplasmic surface of the PM at these locations contain many proteins,
particularly clathrin. These proteins form a lattice meshwork.
• The coated pit invaginates and pinches off forming a coated vesicle which
contains the receptor plus the bound ligand.
• Coated vesicles lose their clathrin and fuse with endosomes. Clathrin detaches
and recycles back to the PM.
4. Properties of the contains cristae which increases the SA
mitochondria
matrix contains dna, tRNA, mRNA, and rRNA
very high protein to lipid ratio
new mitochondria arise by the fusion of existing mitochondria
responsible for the production of the cell's ATP and carries out most cellular
oxidation.
5. Endoplasmic cisterna
reticulum
1/4
