Questions and Answers
Which of the following statements is FALSE regarding norepinephrine?
True
Describe the functioning of catecholamines when the body is faced with a short-term stressor.
When catecholamines are secreted, they increase heart rate, blood pressure, cardiac output and blood glucose levels. These actions result in more blood to the muscles and more glucose available for quick energy.
What makes epinephrine and norepinephrine different?
Norepinephrine also works as a neurotransmitter found at nerve endings in the sympathetic nervous system.
Adrenaline is another name for _____.
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What stimulates the adrenal medulla to secrete its hormones?
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Study Notes
Norepinephrine
- Norepinephrine is not the antagonist of epinephrine; this statement is false.
- It acts as both a hormone and neurotransmitter, crucial in the sympathetic nervous system.
Catecholamines and Short-Term Stress
- Catecholamines, such as epinephrine and norepinephrine, are released during short-term stressors.
- Their secretion leads to increased heart rate, elevated blood pressure, and higher cardiac output.
- Blood glucose levels rise, providing quick energy for muscles during stress response.
Differences Between Epinephrine and Norepinephrine
- Both are classified as catecholamines but serve different roles.
- Norepinephrine functions as a neurotransmitter at sympathetic nerve endings, influencing nerve signaling.
Other Names for Epinephrine
- Epinephrine is also commonly known as adrenaline.
Stimulation of Hormonal Secretion
- The sympathetic nervous system is responsible for stimulating the adrenal medulla, leading to the secretion of epinephrine and norepinephrine.
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Description
Test your knowledge on the roles of epinephrine and norepinephrine in stress adaptation. This quiz focuses on the functioning of catecholamines when the body encounters short-term stressors. Prepare to dive deep into the mechanisms of these crucial hormones.
