Choose the incorrect statement about ions and the RMP.

At RMP, K+ concentration is high outside of the cell.

At RMP, concentration of Na+ is low inside the cell.

Normal ECF concentration of Na+ is 135-145mmol/L

Normal ECF concentration of K+ 3.5-5mmol/L

Choose the incorrect statement.

At RMP, most Na+ channels are closed

At RMP, some K+ channels are closed

Na+ channels opening causes depolarisation up to +30mV

K+ channels opening causes repolarisation

At RMP K+ outflow is slightly larger than Na+ inflow

Hyperpolarisation is due to Na+ channels closing before K+ gradient is fully established

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Mer Scott 8 perguntas 5,0 (1 avaliação)

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1The phospholipid bilayer is an insulator which cations cannot pass through, but anions can.
1. AVerdadeiro
2. BFalso
2Choose the incorrect statement about ions and the RMP.
1. AAt RMP, concentration of Na+ is low inside the cell.
2. BNormal ECF concentration of Na+ is 135-145mmol/L
3. CAt RMP, K+ concentration is high outside of the cell.
4. DNormal ECF concentration of K+ 3.5-5mmol/L
3The Na+/K+-ATPase pumps 3 Na+ out of the cell against their gradient and 2 K+ ions into the cell against their gradient.
1. AVerdadeiro
2. BFalso
4Cells are at RMP the majority of the time.
1. AVerdadeiro
2. BFalso
5Choose the incorrect statement.
1. AAt RMP, most Na+ channels are closed
2. BAt RMP, some K+ channels are closed
3. CNa+/K+-ATPase is inactive
6At RMP if more Na+ channels open, the cell becomes depolarised meaning it becomes more negative (-) in comparison to the ECF
1. AVerdadeiro
2. BFalso
7Choose the correct statements.
1. AAt RMP K+ outflow is slightly larger than Na+ inflow
2. BNa+ channels opening causes depolarisation up to +30mV
3. CK+ channels opening causes repolarisation
4. DHyperpolarisation is due to Na+ channels closing before K+ gradient is fully established
8Depolarisation is inhibitory, hyperpolarisation is excitatory.
1. AVerdadeiro
2. BFalso

Descrição: Know the two main cations that contribute to the electrical properties of a neuron. Understand the different ways these cations can move across the semi-permeable membrane of the neuron (channels vs pump). List the different types of polarisation of a nerve cell membrane. Explain what is meant by the resting membrane potential. Explain what is meant by a local potential.
Autor: Mer Scott
Idioma: English
Visualizações: 29
Etiquetas: hubs191 human movement and sensation (l16 - 31)
Avaliação: 5,0 de 5 · 1 avaliação
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