Multiple Choice
What evolutionary advantage does compartmentalization of core metabolic processes offer eukaryotes?
89
views
10. Cell Signaling
Introduction to Cell Signaling
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The smell of croissants in a bakery would trigger the __________ phase of gastric secretion.
A
post-absorptive
B
intestinal
C
cephalic
D
gastric
Verified step by step guidance1
Step 1: Understand the phases of gastric secretion. Gastric secretion is divided into three phases: cephalic, gastric, and intestinal. Each phase is triggered by specific stimuli and involves different mechanisms.
Step 2: Define the cephalic phase. The cephalic phase is initiated by sensory stimuli such as the sight, smell, taste, or thought of food. These stimuli activate the central nervous system, particularly the vagus nerve, which signals the stomach to prepare for digestion by secreting gastric juices.
Step 3: Relate the sensory stimulus in the problem to the cephalic phase. The smell of croissants in a bakery is a sensory stimulus that would activate the cephalic phase of gastric secretion, as it involves the brain's response to external cues related to food.
Step 4: Differentiate the cephalic phase from the other phases. The gastric phase is triggered by the presence of food in the stomach, while the intestinal phase is initiated when chyme enters the small intestine. Neither of these phases is related to sensory stimuli like smell.
Step 5: Conclude that the correct answer is the cephalic phase, as it is the phase directly associated with sensory stimuli such as the smell of food.
5:03mWatch next
Master Introduction to Cell Signaling with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Introduction to Cell Signaling practice set
Problem sets built by lead tutorsExpert video explanations