Answer:
The most common cause of aortic stenosis is the build up of calcium deposits on the aortic valve, which increases with age causing the aortic valve to stiffen and narrow over time. This results in impaired blood flow between the heart and body
Explanation:
Parkinson's disease- dopamine disorder is correctly paired with an associated neurotransmitter. thus correct option (a)
Parkinson's disease is a type of disorder in which the nerve cells responsible for the physical movement of the body get affected. The constricted movement of the body is due to the damaged or died nerve cells which generate a neurotransmitter called as Dopamine. The reduction of dopamine induces Parkinson's diseases and it's symptoms are tremor, constricted body movements, movement coordination and many more.
What is the life expectancy of Parkinson's disease?
Parkinson's disease does not directly cause people to die, but the condition can place great strain on the body, and can make some people more vulnerable to serious and life-threatening infections. But with advances in treatment, most people with Parkinson's disease now have a normal or near-normal life expectancy.
Learn more about parkinson's disease to visit this link
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Answer:
The correct answer will be option D- blocking Cl channel.
Explanation:'
Quinidine is a stereoisomer of quinine derived from the bark of Cinchona plants which is used in the medication of the heart as class I antiarrhythmic agent. This alkaloid decreases the automaticity and increases the duration of the cellular action potential of the heart.
This alkaloid acts by blocking the neurotransmission through blocking of sodium and potassium channels responsible for the depolarization in non-nodal tissues like atrial cells, ventricular cells. This decrease in the neurotransmission of an action potential depends on the Ca⁺² ions and the quinidine can also act by blocking the Ca⁺² channels as well as B adrenergic receptor.
Thus, option D-blocking Cl channel is the correct answer.
