1. Because of the leakage of [choose \" k+\", \"Na+\", \"Cl-\" ] ions into the c
ID: 3511879 • Letter: 1
Question
1. Because of the leakage of [choose "k+", "Na+", "Cl-" ] ions into the cell by diffusion, the resting membrane potential [choose increases, decreases] and results in some diffusion of [choose k+, Na+, Cl- ] ions out of the cell.
2. An action potential may be initiated in a neuron when [choose Nerve Impulse, antagonist, a neurotransmitter] binds to a [choose "ligand-gated", "open", "Na+/K+"] ion channel that serves as a [choose ligand, chanel, receptor ]
3. Degeneration of dopamine-responsive neurons in the brain is the cause of [ Select "Alzheimer's", "Parkinson's", "Chagas"] disease, and is treated with [ Select "L-dopa", "serotonin", "norephinephrine"]
Explanation / Answer
Question 1
Answer
The membrane potential is changed by movement of ions through inside or outside of the membrane.
Because of the leakage of "Na+ ions into the cell by diffusion, the resting membrane potential decreases to less negative and results in some diffusion of k+ ions out of the cell. The sodium, potassium exchange in the ration of 3:2.
Because of the leakage of "K+ ions into the cell by diffusion, the resting membrane potential increases to more negative and results in some diffusion of Na+ ions out of the cell. The sodium, potassium exchange in the ration of 3:2. The excess opening of potassium ions leads to hyperpolarization.
Question 2
Answer
The action potential can be developed due to the stimulation of the nerve. This can occur by binding of the neurotransmitter to the ligand ion channel receptors.
An action potential may be initiated in a neuron when a neurotransmitter binds to a "ligand-gated", ion channel that serves as a Receptor.
Question 3
Answer
The dopamine is produced dopaminergic neurons. degeneration of these neurons in substantial nigra leads to decreased dopamine causes Parkinson's disease.
Degeneration of dopamine-responsive neurons in the brain is the cause of "Parkinson's", disease, and is treated with L-dopa.
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