32 Questions
What is the approximate thickness of the plasma membrane?
7.5 to 10 nm
What is the primary component of the plasma membrane?
Phospholipid Bilayer
What is the role of cholesterol in the cell membrane?
Stabilizes the cell membrane and modulates the fluidity of all membrane components
What percentage of the plasma membrane is made of proteins?
50%
What are the two types of proteins present in the plasma membrane?
Integral and Peripheral
What is the role of glycocalyx in the plasma membrane?
Has an important role in cell attachments or adhesions, and as receptors
What is the function of the smooth endoplasmic reticulum?
Site of lipid synthesis and carbohydrate metabolism
Which organelle is responsible for posttranslational modification and packaging of proteins?
Golgi Apparatus
What is the main role of ribosomes in the cell?
Facilitate protein synthesis
Which process involves the uptake of large, solid particles by the cell?
Phagocytosis
Which component of the cell membrane shows selective permeability?
Integral proteins
What is the function of receptor-mediated endocytosis?
Involves pinocytosis or phagocytosis via receptors on cell membranes
Which type of ER is involved in protein synthesis and folding?
Rough Endoplasmic Reticulum
What is the primary function of the fluid mosaic model in the cell membrane?
Communication receptor or binding sites for different bloodborne hormones
What are peripheral proteins bound to in the cell membrane?
Glycoproteins
Which organelle is responsible for detoxifying drugs and alcohol?
Smooth Endoplasmic Reticulum
The cell is the basic structural and functional unit of ______.
life
The plasma membrane is also known as the cell membrane or ______.
plasmalemma
Cholesterol stabilizes the cell membrane and modulates the fluidity of all membrane ______.
components
Approximately 50% of the membrane is made of ______.
protein
Phospholipid is a fat molecule with attached polar heads and nonpolar ______.
tails
The glycocalyx has an important role in cell ______.
surfaces
The extbf{fluid mosaic model} describes the cell membrane as a mosaic of lank{} and lank{} molecules.
lipid, protein
The cell membrane is permeable to oxygen, carbon dioxide, water, steroids, and lipid-soluble chemicals, due to its selective lank{}.
permeability
Endocytosis is the process of lank{} of extracellular material into the cell.
ingestion
Exocytosis is the lank{} of material from the cell.
release
The extbf{rough endoplasmic reticulum} is the site of lank{} synthesis and folding.
protein
The extbf{smooth endoplasmic reticulum} is involved in lipid synthesis, carbohydrate metabolism, and the detoxification of lank{} and lank{}.
drugs, alcohol
The extbf{golgi apparatus} is responsible for posttranslational modification and lank{} of proteins.
packaging
The extbf{ribosomes} serve as the scaffold and catalyst for lank{} synthesis.
protein
The extbf{glycocalyx} contributes to a cell surface coating and is involved in cell-to-cell recognition through its lank{} outward recognition.
extending
Receptor-mediated endocytosis involves the uptake of material via lank{} on cell membranes.
receptors
Study Notes
Plasma Membrane Structure and Function
- The plasma membrane is approximately 5-10 nanometers thick.
- The primary component of the plasma membrane is phospholipid, a fat molecule with attached polar heads and nonpolar tails.
- Cholesterol stabilizes the cell membrane and modulates the fluidity of all membrane phospholipids.
- Proteins make up about 50% of the plasma membrane.
Types of Proteins in the Plasma Membrane
- There are two types of proteins present in the plasma membrane: integral proteins and peripheral proteins.
- Peripheral proteins are bound to the lipid bilayer or integral proteins.
Glycocalyx and Cell-to-Cell Recognition
- The glycocalyx has an important role in cell-to-cell recognition through its carbohydrate outward recognition.
- The glycocalyx contributes to a cell surface coating.
Endoplasmic Reticulum and Protein Synthesis
- The smooth endoplasmic reticulum is involved in lipid synthesis, carbohydrate metabolism, and the detoxification of drugs and alcohol.
- The rough endoplasmic reticulum is the site of protein synthesis and folding.
- The Golgi apparatus is responsible for posttranslational modification and packaging of proteins.
Cellular Processes
- Endocytosis is the process of uptake of extracellular material into the cell.
- Receptor-mediated endocytosis involves the uptake of material via receptors on cell membranes.
- Exocytosis is the release of material from the cell.
Cellular Organelles and Functions
- Ribosomes serve as the scaffold and catalyst for protein synthesis.
- The Golgi apparatus is responsible for posttranslational modification and packaging of proteins.
- The smooth endoplasmic reticulum is involved in the detoxification of drugs and alcohol.
Cellular Structure and Function
- The cell is the basic structural and functional unit of life.
- The plasma membrane is also known as the cell membrane or cytoplasmic membrane.
- The fluid mosaic model describes the cell membrane as a mosaic of protein and lipid molecules.
This quiz covers the introduction to cytoplasm in human histology, focusing on the structure and components of the plasma membrane. Topics include the role of the cell membrane, its components like phospholipid bilayer, cholesterol, proteins, and oligosaccharide chains.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
