Multiple Choice
Which of the following examples is a true statement about the differences between hormones and neurotransmitters?
43. Endocrine System
Endocrine System
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What result would you expect following the binding of epinephrine to an α-type epinephrine receptor?
A
Blood flow to the skeletal muscles increases.
B
Protein kinase A is activated.
C
Glycogen is broken down.
D
Glucose is released from the cell.
E
Blood flow to the intestines decreases.
Verified step by step guidance1
Understand that epinephrine, also known as adrenaline, is a hormone and neurotransmitter that plays a role in the 'fight or flight' response, preparing the body for rapid action.
Recognize that epinephrine binds to different types of adrenergic receptors, including alpha (α) and beta (β) receptors, which are distributed in various tissues and have different effects.
Identify that α-type adrenergic receptors, when activated by epinephrine, generally cause vasoconstriction, which is the narrowing of blood vessels.
Consider the physiological effect of vasoconstriction in the context of the body's response to stress or danger. Vasoconstriction in certain areas, such as the intestines, redirects blood flow to more critical areas like the heart and muscles.
Conclude that the binding of epinephrine to α-type receptors would lead to decreased blood flow to the intestines, as blood is redirected to areas that are more immediately necessary for a 'fight or flight' response.
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