[Campbell Biology P.1062] During a primary "fight-or-flight" response mediated by epinephrine... | Practice Question

During a primary "fight-or-flight" response mediated by epinephrine, which of the following coordinated effects would be expected to occur based on the provided text? Select all that apply

  • A: Increased blood glucose levels to provide fuel.
  • B: Increased blood flow to skeletal muscles.
  • C: Decreased blood flow to the intestines.
  • D: Direct activation of the adrenal cortex to release ACTH.

Explanation

The text describes how epinephrine coordinates the 'fight-or-flight' response: it increases blood glucose liver cells , increases blood flow to skeletal muscles vasodilation , and decreases blood flow to intestines vasoconstriction , redirecting blood to active skeletal muscle. ACTH release and subsequent adrenal cortex activation are part of the broader stress response involving the hypothalamus-pituitary-adrenal axis, distinct from the direct effects of epinephrine on its target cells mentioned.