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Analyze the direction of a nerve impulse
The transmission of a nerve impulse travels from the receiving end to the sending end of a neuron:
- Dendrites receive the incoming signal.
- The signal passes through the cell body (soma).
- The axon carries the impulse away to the next cell.
- Therefore, the correct sequence is: dendrite \(
ightarrow\) cell body \(
ightarrow\) axon.
Analyze blood glucose regulation
After a meal, blood glucose levels rise. Insulin is released to lower blood glucose back to its normal set point:
- This mechanism opposes the initial stimulus (rising glucose) to restore balance.
- This is a classic example of negative feedback.
Identify the gland releasing epinephrine during stress
Epinephrine (adrenaline) is the hormone responsible for the "fight-or-flight" response during acute stress:
- It is produced and released by the adrenal glands, which sit on top of the kidneys.
Analyze the final question on hormone/gland function
The blurry text of the fourth question asks about a specific hormone or gland action:
- "Epinephrine and norepinephrine are hormones released by..." or "Epinephrine is released during stress from..."
- The options list glands/structures: Adrenal medulla, Adrenal cortex, Pancreas, Thyroid.
- Epinephrine and norepinephrine are specifically secreted by the adrenal medulla.
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Question 1
- A axon \(
ightarrow\) cell body \(
ightarrow\) dendrite
- B dendrite \(
ightarrow\) axon \(
ightarrow\) cell body
- C cell body \(
ightarrow\) dendrite \(
ightarrow\) axon
- **D dendrite \(
ightarrow\) cell body \(
ightarrow\) axon (Correct answer)**
Question 2
- A Positive feedback
- B Negative feedback (Correct answer)
- C Reflex action
- D Passive transport
Question 3
- A Pancreas
- B Thyroid
- C Pituitary
- D Adrenal glands (Correct answer)
Question 4
- A Adrenal medulla (Correct answer)
- B Adrenal cortex
- C Pancreas
- D Thyroid