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biomedical science 8 case study > the oesophagus > Flashcards

the oesophagus Flashcards

1
Q

THE OESOPHAGUS CAN BE DESCRIBED AS A _____ MUSCULAR ____

A

STRONG MUSCULAR TUBE

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2
Q

WHAT ARE THE THREE PARTS OF THE OESOPHAGUS

A

CX
TX
ABDOMINAL

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3
Q

WHAT IS THE SYMPATHETIC SUPPLY TO THE OESOPHAGUS

A

T1-5

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4
Q

WHAT IS THE PARASYMPATHETIC SUPPLY TO THE OESOPHAGUS

A

CN X

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5
Q

WHERE DOES THE OESOPHAGUS EXTEND BETWEEN

A

PHARYNX AND STOMACH

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6
Q

WHAT IS THE APPROXIMATE LENGTH AND DIAMETER OF THE OESOPHAGUS

A

25CM LONG
2CM DIAMATER

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7
Q

IS THE OESOPHAGUS COLLAPSED WHEN NOT INVOLVES UN FOOD PROPULSION

A

YES

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8
Q

WHAT INITIATES REFLEX PERISTALSIS IN THE INFERIOR 2/3 OF THE OESOPHAGUS

A

FOOD BOLUS

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9
Q

WHAT ARE THE TWO PHASES OF DEGLUTITION

A

BUCCAL PHASE
PHARYNGEAL/OESOPHAGEAL PHASE

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10
Q

IS THE BUCCAL PHASE OF DEGLUTITION VOLUNTARY OR INVOLUNTARY

A

VOLUNTARY

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11
Q

IS THE PHARYNGEAL/OESOPHAGEAL PHASE VOLUNTARY OR INVOLUNTARY

A

INVOLUNTARY

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12
Q

WHAT EPITHELIUM LINES THE OESOPHAGUS

A

STRATIFIED SQUAMOUS EPITHELIUM

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13
Q

AT WHAT POINT in the oesophagus DOES THE EPITHELIUM CHANGE TO SIMPLE COLUMNAR EPITHELIUM

A

GASTROOESOPHAGEAL JUNCTION

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14
Q

WHAT IS IN THE SUBMUCOSA OF THE OESOPHAGUS

A

MUCOUS SECRETING GLANDS

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15
Q

WHAT TYPES OF MUSCLE ARE PRESENT IN EACH THIRD OF THE OESOPHAGUS

A

SUP 1/3 SKELETAL
MID 1/3 SKELETAL AND SMOOTH
INF 1/3 SMOOTH

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16
Q

WHAT IS THE PARASYMPATHETIC INNERVATION OF THE UPPER 1/2 OF THE OESOPHAGUS

A

RECURRENT LARYNGEAL NERVE (CNX)

17
Q

WHAT IS THE NERVE SUPPLY TO THE LOWER PART OF THE OESOPHAGUS

A

ENTERIC NS
AUTONOMIC NS
PARASYMP = CN X
SYMP = CPSN, APSN
VISCERAL AFFERENTS

18
Q

WHAT REINFORCES THE LOWER OESOPHAGEAL SPHINCTER EXTRINSICALLY

A

DIAPHRAGM

19
Q

THE LOWER OESOPHAGEAL SPHINCTER IS A THICKENING OF THE ______ MUSCLE LAYER

A

CIRCULAR

20
Q

WHAT KIND OF SPHINCTER IS THE LOWER OESOPHAGEAL SPHINCTER

A

FUNCTIONAL SPHINCTER

21
Q

WHAT ARE THREE ANATOMIC FEATURES THAT PREVENT GORD

A

OESOPHAGUS MEETS STOMACH AT AN ACUTE ANGLE
THICKENED CIRCULAR MM
EXTRINSIC SUPPORT FROM DIAPHRAGM AT T10

22
Q

WHAT KEEPS THE STOMACH CONTENTS CONTAINED WHEN INVERTED

A

PERISTALSIS IS UNIDIRECTIONAL
EXTRINSIC SUPPORT OF THE LOS BY THE DIAPHRAGM

23
Q

WHAT IS BARETS MUCOSA

A

WHEN STRATIFIED SQUAMOUS EPITHELIUM IS REPLACED BY SIMPLE COLUMNAR EPITHELIUM IN AN ATTEMPT TO PROTECT THE OESOPHAGUS FOLLOWING LONG TERM EXPOSURE TO HCL

24
Q

WHAT IS THE DANGER OF BARRETS MUCOSA

A

WHILST IT IS A GOOD SHORT TERM SOLUTION, IY IS CONSIDERED A PRE-MALIGNANT TRANSFORMATION

biomedical science 8 case study (18 decks)

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