Answer:
Explanation:
1. Short reflexes are stimulated by stretching or chemical stimulation of the myenteric plexus, which can result in peristaltic contractions.
2. Long reflexes utilize the parasympathetic nervous system, specifically the Vagus nerve.
3. Hormonal secretions like gastrin and secretin are released into the blood and stimulate relatively distant parts of the digestive tract.
4. Paracrine secretions like histamine and prostaglandins diffuse through the tissue fluids and stimulate nearby target cells.
The letter A is the one that represents a neurotransmitter acting via direct effects.
<h3>What is a neurotransmitter?</h3>
These are chemical messenger that helps carries signals across the neurons and target cells throughout the body.
Hence, the letter A represents a neurotransmitter acting via direct effects because its involves direct connection between the neurons.
Therefore, the Option A is correct.
Read more about neurotransmitter
<em>brainly.com/question/26387085</em>
Answer:
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Explanation:
Answer: C:19
Explanation: You subtract 15 from 34
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