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.
The information given illustrates that Robert most likely has a muscle strain.
<h3>What is muscle strain?</h3>
It should be noted that a muscle strain means an injury that occurs to the muscle or the tendon.
Based on the information given, the fact that Robert tears his semitendinosus depicts that he has a muscle strain.
Learn more about muscles strain on:
brainly.com/question/15209799
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Answer:
True
Explanation:
Pacemaker cells, unlike other neurons in the body, can depolarized themselves (and therefore can fire action potentials) without the need of an external innervation of the autonomic nervous system.
Each class of pacemaker cells has its own intrinsic rate.
For example, sinoatrial node rate is 60-100 bpm (the normal heart frequency).
The atrioventricular node is also part of the electrical conduction system of the heart. When the sinoatrial node fails, atrioventricular node takes the lead (40-60 bpm).
What makes an individual healthy is keeping physical, environmental, and emotional health in check. Common mental health changes young people face today is definitely some sort of anxiety about (for example) their appearance or hobbies. Mental health is your minds way of showing you how well it is working in the circumstances given.
