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Epinephrine is
- a)Secreted from adrenal medulla and decreases heart beats
- b)Secreted from adrenal medulla and increases heart beats
- c)Secreted from pancreas and regulates glucose level
- d)Secreted from pancreas and decreases glucose level
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Epinephrine isa) Secreted from adrena...
Epinephrine produce strong emotions which can be of fear or anger which result in increase heart rate and secreted from adernal medulla.
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Epinephrine isa) Secreted from adrena...
Epinephrine
Epinephrine, also known as adrenaline, is a hormone and neurotransmitter that is secreted from the adrenal medulla. It plays a crucial role in the body's fight-or-flight response, which is activated during times of stress or danger. Epinephrine has several effects on various organs and systems in the body, including the heart.
Effect on Heartbeat
The correct answer to the given question is option B - Epinephrine is secreted from the adrenal medulla and increases heartbeats. When released into the bloodstream, epinephrine binds to specific receptors on the heart muscle cells, known as beta-adrenergic receptors.
Stimulation of Beta-Adrenergic Receptors
When epinephrine binds to beta-adrenergic receptors in the heart, it activates a signaling pathway known as the cAMP pathway. This pathway leads to an increase in the production of cyclic adenosine monophosphate (cAMP) within the heart cells. Increased cAMP levels then trigger a series of events that ultimately increase the rate and force of heart contractions.
Increase in Heart Rate
Epinephrine causes an increase in heart rate, known as tachycardia. This is because it enhances the electrical activity within the heart, leading to faster depolarization and repolarization of the cardiac cells. As a result, the heart beats faster, which increases the delivery of oxygen and nutrients to the body's tissues.
Increase in Stroke Volume
In addition to increasing heart rate, epinephrine also increases the force of contraction of the heart muscle. This leads to an increase in stroke volume, which is the amount of blood pumped out by the heart with each beat. The increased stroke volume ensures that a sufficient amount of oxygenated blood is supplied to the body's organs and tissues during times of stress or physical activity.
Overall Effect on Cardiac Output
The combined effects of increased heart rate and stroke volume result in an overall increase in cardiac output. Cardiac output is the amount of blood pumped out by the heart per unit of time and is a measure of the heart's efficiency. Epinephrine helps to optimize cardiac output during times when the body needs to respond quickly to a stressful or dangerous situation.
Conclusion
In summary, epinephrine, secreted from the adrenal medulla, increases heartbeats by stimulating beta-adrenergic receptors in the heart. This leads to an increase in heart rate and stroke volume, ultimately increasing cardiac output. These effects are crucial for the body's fight-or-flight response and ensure an adequate supply of oxygenated blood to the body's tissues during times of stress or physical exertion.
Epinephrine, also known as adrenaline, is a hormone and neurotransmitter that is secreted from the adrenal medulla. It plays a crucial role in the body's fight-or-flight response, which is activated during times of stress or danger. Epinephrine has several effects on various organs and systems in the body, including the heart.
Effect on Heartbeat
The correct answer to the given question is option B - Epinephrine is secreted from the adrenal medulla and increases heartbeats. When released into the bloodstream, epinephrine binds to specific receptors on the heart muscle cells, known as beta-adrenergic receptors.
Stimulation of Beta-Adrenergic Receptors
When epinephrine binds to beta-adrenergic receptors in the heart, it activates a signaling pathway known as the cAMP pathway. This pathway leads to an increase in the production of cyclic adenosine monophosphate (cAMP) within the heart cells. Increased cAMP levels then trigger a series of events that ultimately increase the rate and force of heart contractions.
Increase in Heart Rate
Epinephrine causes an increase in heart rate, known as tachycardia. This is because it enhances the electrical activity within the heart, leading to faster depolarization and repolarization of the cardiac cells. As a result, the heart beats faster, which increases the delivery of oxygen and nutrients to the body's tissues.
Increase in Stroke Volume
In addition to increasing heart rate, epinephrine also increases the force of contraction of the heart muscle. This leads to an increase in stroke volume, which is the amount of blood pumped out by the heart with each beat. The increased stroke volume ensures that a sufficient amount of oxygenated blood is supplied to the body's organs and tissues during times of stress or physical activity.
Overall Effect on Cardiac Output
The combined effects of increased heart rate and stroke volume result in an overall increase in cardiac output. Cardiac output is the amount of blood pumped out by the heart per unit of time and is a measure of the heart's efficiency. Epinephrine helps to optimize cardiac output during times when the body needs to respond quickly to a stressful or dangerous situation.
Conclusion
In summary, epinephrine, secreted from the adrenal medulla, increases heartbeats by stimulating beta-adrenergic receptors in the heart. This leads to an increase in heart rate and stroke volume, ultimately increasing cardiac output. These effects are crucial for the body's fight-or-flight response and ensure an adequate supply of oxygenated blood to the body's tissues during times of stress or physical exertion.
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Epinephrine isa) Secreted from adrenal medulla and decreases heart beats b) Secreted from adrenal medulla and increases heart beats c) Secreted from pancreas and regulates glucose level d) Secreted from pancreas and decreases glucose level Correct answer is option 'B'. Can you explain this answer?
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