Mouth, pharynx & oesophagus Flashcards
1
Q
Which glands produce saliva and what sort?
A
Parotid - serous
Submandibular - mixed
Sublingual - mucous
2
Q
What is saliva composed of?
A
- Ions
- Mucin
- Digestive enzymes
Alpha-amylase - starch, lipase - fat - Antibacterial agents
- Immunoglobulins
- Phosphoproteins
- Blood group factors
3
Q
What is the pH of saliva?
A
6.2-8.0
4
Q
What is the function of saliva?
A
- Solvent
- Lubrication
- Digestion
- Protection
5
Q
What control produces more saliva?
A
Increased parasympathetic input
6
Q
What are the modalities of taste?
A
Sweet, sour, bitter, salt, umami
7
Q
What is involved in mastication?
A
- Movements of mandible against maxilla to fragment food
- Movements of mandible, tongue, lips & cheeks to facilitate mixing with saliva & forming bolus
8
Q
What is the sphincter between the pharynx & oesophagus called?
A
Cricopharyngeus
9
Q
What are the phases of swallowing?
A
- Oral phase - voluntary
- Pharyngeal phase - involuntary
- Oesophageal phase - involuntary
