Question at position 5 Which salivary glands produce the largest volume of saliva?SublingualSubmandibularParotidPalatine单项选择题
A
Sublingual
B
Submandibular
C
Parotid
D
Palatine

Question

Question at position 5 Which salivary glands produce the largest volume of saliva?SublingualSubmandibularParotidPalatine

BlackTom AI · Accepted Answer

The submandibular glands produce the largest volume of saliva in the resting state, providing roughly 60–70% of unstimulated saliva.

Relevant knowledge points:
- There are three paired major salivary glands: parotid, submandibular, and sublingual; plus many minor glands (e.g., palatine).
- Gland secretions differ in volume and composition: parotid = predominantly serous (watery, enzyme-rich); submandibular = mixed serous and mucous; sublingual and many minor glands = mainly mucous.
- Salivary output depends on state: at rest (unstimulated) vs during stimulation (chewing, acid).

Step-by-step reasoning:
1. Compare resting (unstimulated) contributions: empirical physiology shows submandibular glands contribute the largest share — about 60–70% of resting saliva. Parotid contributes ~20–25%, sublingual ~5–10%, and minor glands (including palatine) the remainder.
2. Consider stimulated conditions: during strong stimulation (chewing, gustatory reflex) parotid output rises significantly and can be the dominant contributor temporarily. But the question does not specify stimulation, so the standard interpretation is resting volume.
3. Therefore, for overall (especially resting) daily saliva production, submandibular glands are the principal source.

Why the correct answer is correct:
- Anatomically and physiologically, submandibular glands are larger combined secretors at rest and produce the greatest continuous flow because of their mixed seromucous secretion and ductal anatomy that maintains steady secretion.

Why other options are incorrect:
- Sublingual: mainly mucous and produces only a small fraction of total saliva.
- Parotid: major producer when stimulated, but not the largest source at rest; contributes about 20–25% unstimulated.
- Palatine (minor glands): produce minimal saliva, mostly local mucous secretion.

Conclusion: The correct answer is Submandibular, which matches the provided answer.

Question at position 5 Which salivary glands produce the largest volume of saliva?SublingualSubmandibularParotidPalatine单项选择题

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