Podcast
Questions and Answers
What is the function of the cell membrane?
What is the function of the cell membrane?
- To maintain the medium for the cell's survival (correct)
- To respond to the entry of invaders into the body
- To produce energy for the cell
- To eliminate carbon dioxide and metabolic wastes
Which type of substance makes up approximately 40% of the composition of the cell membrane?
Which type of substance makes up approximately 40% of the composition of the cell membrane?
- Proteins
- Nucleic acids
- Carbohydrates
- Lipids (correct)
What is the significance of the 'fluid mosaic model' in the structure of the cell membrane?
What is the significance of the 'fluid mosaic model' in the structure of the cell membrane?
- It allows free exchange of substances between extracellular and intracellular fluids (correct)
- It represents a rigid and static structure of the cell membrane
- It prevents the entry of invaders into the body
- It produces energy necessary for cell growth and repair
Which characteristic is specific to neurons regarding reproduction?
Which characteristic is specific to neurons regarding reproduction?
What is the function of proteins in the cell membrane?
What is the function of proteins in the cell membrane?
What is the role of carbohydrates in the cell membrane?
What is the role of carbohydrates in the cell membrane?
Which type of molecules form the major lipids in the lipid layer of the cell membrane?
Which type of molecules form the major lipids in the lipid layer of the cell membrane?
What is the function of cholesterol in the lipid layer of the cell membrane?
What is the function of cholesterol in the lipid layer of the cell membrane?
What are the two categories of protein molecules present in the protein layers of the cell membrane?
What are the two categories of protein molecules present in the protein layers of the cell membrane?
Which type of proteins provide a route for the diffusion of water-soluble substances like glucose and electrolytes through the cell membrane?
Which type of proteins provide a route for the diffusion of water-soluble substances like glucose and electrolytes through the cell membrane?
What characterizes channel proteins in the cell membrane in terms of permeability?
What characterizes channel proteins in the cell membrane in terms of permeability?
What is the function of peripheral proteins in the cell membrane?
What is the function of peripheral proteins in the cell membrane?
Which substance is responsible for maintaining the fluid nature of the lipid layer in the cell membrane?
Which substance is responsible for maintaining the fluid nature of the lipid layer in the cell membrane?
What is the outer part of a phospholipid molecule that faces the extracellular fluid?
What is the outer part of a phospholipid molecule that faces the extracellular fluid?
What type of substances are allowed to pass through the semi-permeable lipid layer of the cell membrane?
What type of substances are allowed to pass through the semi-permeable lipid layer of the cell membrane?
What are the two categories into which protein molecules in the cell membrane are classified?
What are the two categories into which protein molecules in the cell membrane are classified?
The cell membrane separates the intracellular fluid (ICF) from the extracellular fluid (ECF).
The cell membrane separates the intracellular fluid (ICF) from the extracellular fluid (ECF).
Neurons are capable of reproducing through division.
Neurons are capable of reproducing through division.
The cell membrane is primarily composed of lipids.
The cell membrane is primarily composed of lipids.
The 'fluid mosaic model' describes the structure of the cell membrane as a rigid and fixed layer.
The 'fluid mosaic model' describes the structure of the cell membrane as a rigid and fixed layer.
The cell membrane is impermeable to all substances.
The cell membrane is impermeable to all substances.
Cholesterol does not play a role in the lipid layer of the cell membrane.
Cholesterol does not play a role in the lipid layer of the cell membrane.
The lipid layer of the cell membrane is semi-permeable and allows water-soluble materials to pass through.
The lipid layer of the cell membrane is semi-permeable and allows water-soluble materials to pass through.
The central layer of the cell membrane is formed by protein substances.
The central layer of the cell membrane is formed by protein substances.
The phospholipid molecules in the lipid layer have a hydrophilic head portion that faces the cytoplasm.
The phospholipid molecules in the lipid layer have a hydrophilic head portion that faces the cytoplasm.
Peripheral proteins are tightly bound with the cell membrane.
Peripheral proteins are tightly bound with the cell membrane.
Cholesterol in the cell membrane helps to maintain the fluid nature of the lipid layer.
Cholesterol in the cell membrane helps to maintain the fluid nature of the lipid layer.
Integral proteins provide routes for diffusion of water-soluble substances like glucose and electrolytes through the cell membrane.
Integral proteins provide routes for diffusion of water-soluble substances like glucose and electrolytes through the cell membrane.
Channel proteins in the cell membrane are not characterized by selective permeability.
Channel proteins in the cell membrane are not characterized by selective permeability.
The protein layers of the cell membrane are situated on either side of the central lipid layer.
The protein layers of the cell membrane are situated on either side of the central lipid layer.
The major lipids in the lipid layer of the cell membrane are phospholipids and glycolipids.
The major lipids in the lipid layer of the cell membrane are phospholipids and glycolipids.
The carbohydrate molecules in the cell membrane play a role in maintaining its structural integrity.
The carbohydrate molecules in the cell membrane play a role in maintaining its structural integrity.
