BIO 1500 unit 7
1. Cell is the simplest collection of matter that can be : alive
2. , allowing some materials to freely enter
or leave cell, while others cannot move freely, but require a specialized struc-
ture, and occasionally investment: Selectively permeable, energy
3. The plasma membrane is flexible to allow certain cells, such as RBC and WBC,
to change shape as they pass through narrow capillaries (TRUE OR FALSE): TRUE
4. allowing cells to recognize one another, vital
for tissue and organ formation during early development, and which later
plays a role in immune response's " " vs " - " distinc-
tion/recognition: carries markers, self, non-self
,5. •Ability for complex integral proteins, , to transmit
. These act as extracellular input receivers and as intracellu-
lar processing activators (signal transduction) -> provide attachment sites for
effectors like hormones and growth factors and activate intracellular response
cascades.: receptors, signals
6. Advances in microscopy, notably transmission electron microscopy
( ), allowed researchers to see that plasma membrane's core consisted
of a .
Electrons passing through the specimen (stained with atoms of heavy metals
that attach to certain cellular structures) are scattered more in the
regions, so fewer are transmitted.: TEM, double layer, denser
,7. Identification of model by TEM
Describes membrane structure as a —in-
cluding:...: mosaic, phospholipid bilayer
• Lipids (phospholipids & cholesterol)
• Proteins
• Carbohydrates
8. Carbohydrates attached to lipids ( ) and to proteins
( ) extend from the membrane's outward-facing surface: glycol-
ipids, glycoprotein
, 9. What makes up a phospholipid?: •phosphate-containing group
• a three-carbon glycerol backbone
• and two fatty acid molecules.
10. A phospholipid is . Describe the polarity and composition
of its head and tail?: amphiphilic
- head area (phosphate-containing group),polar character, hydrophilic (water-loving)
- tail area (the fatty acids), no charge, hydrophobic (water-hating)
11. areas of these molecules (heads) look like a collection of
balls, in contact with aqueous fluid; face the cell's interior and exterior: Hydrophilic
12. Hydrophobic areas of the phospholipid interact with other polar molecules
like water (TRUE OR FALSE): FALSE
13. Phospholipids form a lipid . Explain what this separates?: a double
layered phospholipid barrier that separates the water and other materials on one side from the water and other
materials on the other side
1. Cell is the simplest collection of matter that can be : alive
2. , allowing some materials to freely enter
or leave cell, while others cannot move freely, but require a specialized struc-
ture, and occasionally investment: Selectively permeable, energy
3. The plasma membrane is flexible to allow certain cells, such as RBC and WBC,
to change shape as they pass through narrow capillaries (TRUE OR FALSE): TRUE
4. allowing cells to recognize one another, vital
for tissue and organ formation during early development, and which later
plays a role in immune response's " " vs " - " distinc-
tion/recognition: carries markers, self, non-self
,5. •Ability for complex integral proteins, , to transmit
. These act as extracellular input receivers and as intracellu-
lar processing activators (signal transduction) -> provide attachment sites for
effectors like hormones and growth factors and activate intracellular response
cascades.: receptors, signals
6. Advances in microscopy, notably transmission electron microscopy
( ), allowed researchers to see that plasma membrane's core consisted
of a .
Electrons passing through the specimen (stained with atoms of heavy metals
that attach to certain cellular structures) are scattered more in the
regions, so fewer are transmitted.: TEM, double layer, denser
,7. Identification of model by TEM
Describes membrane structure as a —in-
cluding:...: mosaic, phospholipid bilayer
• Lipids (phospholipids & cholesterol)
• Proteins
• Carbohydrates
8. Carbohydrates attached to lipids ( ) and to proteins
( ) extend from the membrane's outward-facing surface: glycol-
ipids, glycoprotein
, 9. What makes up a phospholipid?: •phosphate-containing group
• a three-carbon glycerol backbone
• and two fatty acid molecules.
10. A phospholipid is . Describe the polarity and composition
of its head and tail?: amphiphilic
- head area (phosphate-containing group),polar character, hydrophilic (water-loving)
- tail area (the fatty acids), no charge, hydrophobic (water-hating)
11. areas of these molecules (heads) look like a collection of
balls, in contact with aqueous fluid; face the cell's interior and exterior: Hydrophilic
12. Hydrophobic areas of the phospholipid interact with other polar molecules
like water (TRUE OR FALSE): FALSE
13. Phospholipids form a lipid . Explain what this separates?: a double
layered phospholipid barrier that separates the water and other materials on one side from the water and other
materials on the other side
