0
What else can I help you with?
What is the difference between integral and transmembrane proteins in terms of their structure and function?
Integral proteins are embedded within the lipid bilayer of the cell membrane, while transmembrane proteins span across the entire membrane. Integral proteins are involved in cell signaling and transport of molecules, while transmembrane proteins play a role in cell communication and maintaining cell structure.
What causes transmembrane channels in target cells?
Transmembrane channels in target cells are typically formed by specialized proteins that span the cell membrane. These proteins create a passageway for specific ions or molecules to move across the membrane, allowing for communication and transport between the cell's interior and exterior environments. The opening and closing of these channels can be regulated by various factors, including voltage changes, ligand binding, or mechanical force.
What is the electrical potential across the cell membrane of a nerve cell or muscle cell when the cell is not active?
The resting membrane potential of a nerve cell or muscle cell is typically around -70 millivolts. This electrical potential is maintained by the unequal distribution of ions across the cell membrane, with more negative ions inside the cell than outside. This resting potential is essential for the cell to respond to changes in its environment and generate electrical signals when needed.
What are proteins that stick into the cell membrane and pass all the way through called?
carbohydrate molecules ( they are attached to most of these proteins.)
How do amino acids contribute to the structure and function of transmembrane proteins?
Amino acids are the building blocks of proteins, including transmembrane proteins. The specific sequence of amino acids in a transmembrane protein determines its structure and function. Some amino acids have hydrophobic properties, which help anchor the protein within the cell membrane. Other amino acids form hydrogen bonds and other interactions that stabilize the protein's structure and allow it to perform its specific function, such as transporting molecules across the cell membrane.
Why is the transmembrane potential is important?
The transmembrane potential is important because it helps to maintain the resting state of a cell, allows for the propagation of action potentials, and contributes to various cellular processes such as ion transport, signaling, and cell communication. Changes in transmembrane potential can have significant effects on cellular function and overall physiology.
The transmembrane potential of a normal cell under homeostatic conditions?
The transmembrane potential of a normal cell under homeostatic conditions is typically around -70 millivolts, with the inside of the cell being negatively charged compared to the outside. This potential is maintained through the action of ion channels and pumps in the cell membrane that regulate the flow of ions across the membrane.
What is the difference between integral and transmembrane proteins in terms of their structure and function?
Integral proteins are embedded within the lipid bilayer of the cell membrane, while transmembrane proteins span across the entire membrane. Integral proteins are involved in cell signaling and transport of molecules, while transmembrane proteins play a role in cell communication and maintaining cell structure.
What is the transmembrane potential of a nonstimulated cell?
The transmembrane potential of a nonstimulated cell, often referred to as the resting membrane potential, typically ranges from -60 to -70 millivolts (mV). This potential arises from the uneven distribution of ions, primarily sodium (Na+) and potassium (K+), across the cell membrane, maintained by the sodium-potassium pump (Na+/K+ ATPase). The inside of the cell is negatively charged relative to the outside due to the presence of negatively charged proteins and the higher concentration of potassium ions inside the cell.
Are proteins involved in the sodium potassium pump?
Yes, proteins play a crucial role in the function of the sodium-potassium pump. The pump itself is a type of transmembrane protein that actively transports sodium and potassium ions across cell membranes, helping to maintain the cell's resting potential.
How is the K transmembrane flux when neurone hyperpolarizes?
The potassium ion channels in the cell open with hyperpolarization (injecting a negative current to take the cell potential more negative than Ek) The potassium ion channels in the cell open with hyperpolarization (injecting a negative current to take the cell potential more negative than Ek)
What type of proteins don't go through the bilayer?
It important that some proteins extend all the way through the bilayer of a plasma membrane. This is to offer protection to the cell and also facilitate the transport of various substances in and out of the cell.
This type of macromolecules is a component of the cell membrane that helps move molecules in and out of the cell?
Transmembrane Proteins
What is the cells transmembrane resting potential created by?
The transmembrane resting potential of a cell is primarily created by the differential distribution of ions across the cell membrane, particularly sodium (Na+), potassium (K+), and chloride (Cl-) ions. The Na+/K+ ATPase pump actively transports Na+ out of the cell and K+ into the cell, resulting in a higher concentration of K+ inside and Na+ outside. This unequal distribution, along with the selective permeability of the membrane to K+, leads to a negative charge inside the cell relative to the outside, typically around -70 mV. The resting potential is maintained by the balance between the concentration gradients and the permeability of the membrane to different ions.
What is the difference between an antibody and a B cell receptor?
Antibodies lack a transmembrane domain.
Cellular adhesion molecules are?
Cell adhesion molecules are groups of transmembrane proteins that mediate.
A gene having the potential to trigger cancerous changes in a cell?
oncogene
