0
Add your answer:
Earn +20 pts
What is it that ion channels may be always or have?
They may be always open or they may have close gated channels
Ion channel that are always open are called?
Ion channels that are always open are called leak channels. They allow a continuous flow of ions across the cell membrane, helping to maintain the resting membrane potential of the cell.
Which ion channels open in response to a change in membrane potential?
voltage-gated ion channels
Are ion channels cell membrane pores?
Yes, ion channels are protein-based cell membrane pores that allow the passage of ions across the membrane, regulating the cell's resting potential, signaling, and other cellular processes.
When the nervous system signals a muscle to contract the ion channels open?
sodium ion
Are gated channels are always open?
No, gated channels are not always open. Gated channels typically require some form of authorization or access control before allowing entry, such as a password, permission, or verification process. This helps to restrict access to authorized users only.
What forms pores in the cell membrane?
Pores in the cell membrane can be formed by protein complexes called ion channels or porins. Ion channels allow specific ions to pass through the membrane, while porins allow the passage of larger molecules or solutes. These pores play crucial roles in regulating the movement of substances in and out of the cell.
What type of ion channels does an actions potential in the axon terminal of a motor neuron open?
Voltage-gated calcium channels are the ion channels that open during an action potential in the axon terminal of a motor neuron. These channels allow calcium ions to flow into the terminal, triggering the release of neurotransmitters into the synaptic cleft.
What channels open when the nervous system signals a muscle to contract?
sodium ion
When an action potential arrives at the axon terminal of motor neuron which ion channels open?
voltage-gated calcium channels
How do voltage-gated ion channels differ from ligand-gated ion channels in terms of their mechanisms of activation and regulation?
Voltage-gated ion channels are activated by changes in membrane potential, while ligand-gated ion channels are activated by binding of specific molecules (ligands). Voltage-gated channels open in response to changes in electrical charge across the membrane, whereas ligand-gated channels open when a specific ligand binds to the channel. Additionally, voltage-gated channels are regulated by membrane potential, while ligand-gated channels are regulated by the presence or absence of specific ligands.
When the chemically gated ion channels open which ion is mainly responsible for depolarizing the sarcolemma?
The main ion responsible for depolarizing the sarcolemma is sodium (Na+).
