L.3

Question 1

Amount of secreted saliva is about

Answer 1

One liter

Question 2

Saliva composed of

Answer 2

1.99,5% water 💧
2.0,5% solids which include:
- Na, K, Cl, HCO
- alpha amylase
- mucus

Question 3

Function of Alpha amylase

Answer 3

Digest starch

Question 4

Oral tissue become infected with dental caries in absence of

Answer 4

Salivation

Question 5

How many stages for salivary secretion

Answer 5

1. First stage “ primary secretion”
2. second stage “ modification of primary secretion “

Question 6

( FIRST STAGE )
Salivary secretion formed and secreted by

Answer 6

Acini

Question 7

( FIRST STAGE )
Salivary secretion is isotonic which mean

Answer 7

Ions concentration as the plasma

Question 8

( FIRST STAGE )
Salivary secretion contains

Answer 8

1. Alpha amylase
2. Mucus

Question 9

Steps of the second stage“ modification “

Answer 9

1. Reabsorbtion Na & Cl
2. Secretion K & HCO
3. Aldosterone
4. Saliva become hypotonic

Question 10

Second stage “ modification “ of primary secretion formed by

Answer 10

Ductal epithelium

Question 11

Reabsorbtion of Na and Cl , will cause differences in plasma and saliva which is

Answer 11

It become lower in saliva than the plasma

Question 12

Secretion of k and HCO , will cause differences in plasma and saliva which is

Answer 12

higher in saliva than the plasma

Question 13

Function of aldosterone in modification of primary secretion

Answer 13

⬆️ Na reabsorbtion
⬆️ K secretion

Question 14

Explain why the saliva become hypotonic in second stage

Answer 14

1. Ducts impermeable to water
2. Reabsorbed more solute than water
   Which lead the salivary secretion becomes hypotonic

Question 15

Salivary secretion is only controlled by

Answer 15

Nervous system

Question 16

Both sympathetic and para are secretory to saliva but which one is more important

Answer 16

Parasympathetic

Question 17

True secretion is produced by

Answer 17

Parasympathetic innervation

Question 18

Saliva Secretion that rich in water and poor in enzyme , will be innervation by

Answer 18

Parasympathetic

Question 19

Action of parasympathetic innervation will produce saliva with

Answer 19

para ➡️ vasoconstriction only of coronary blood vessels

1. Profuse watery secretion “true “
   
   • rich water
   • poor enzyme
2. Vasodilation to blood vessels of salivary gland

يعني الباقي كلهم ديلاتور 👍🏻

Question 20

Saliva secretion that poor in water and rich in enzyme, will be innervation by

Answer 20

sympathetic

Question 21

Action of sympathetic innervation will produce saliva with

Answer 21

all blood vessels vasoconstriction except muscle and heart

1. Scanty viscous “ trophic”
   
   • poor water
   • rich enzyme
2. Vasoconstriction to blood vessels of salivary gland

Question 22

Secretion of parasympathetic innervation is much than sympathetic because of

Answer 22

Para ➡️ vasodilation ➡️ increase blood supply which needed for secretion

Question 23

Alpha adrenergic is a receptor in

Answer 23

Acinar and ductal of Sympathetic innervation

Question 24

Anticholinergic drug that cause inhibit salivary secretion and dry mouth

Answer 24

Atropine

Question 25

Parasympathetic nervous signals originate from

Answer 25

1. Superior salivary nuclei in brain stem 2. Inferior salivary nuclei in brain stem

Question 26

Nervous control of salivary secretion divided into

Answer 26

1. Unconditioned “ no need previous learning “ 2. Conditioned reflex “ need previous learning “

Question 27

Steps of inborn “ unconditioned control “

Answer 27

1. Food stimulation taste receptor 2. Impulse to salivary nuclei 3. Salivation

Question 28

Steps of conditioned reflex

Answer 28

Smelling of favorite food ➡️ secretion “ signals from taste & smell areas of cerebral cortex —> stimulate salivary nuclei in brain stem —> salivation “