GI Flashcards

0
Q

Omnivore

A

Medium complex GI Tract
Long SI
Slow digestion ⬆️ enz breakdown

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1
Q

Carnivores

A

Simple GI Tract

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2
Q

Herbivore

A

Most complex GI Tract

  1. Hindgut Fermenters Horse: simple stomach, complex LI
  2. Foregut Fermenters Cow & sheep: large complex forestomach➡️ fermentation
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3
Q

Getting energy req processes

A
  1. Digestion: mechanical, GI exocrine secretions, barrier fn
  2. Absorption: digested food enters blood or lymph
    - primarily active transport most nutrients & electrolytes
    - passive lipids/VFA/SCFA
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4
Q

Protein digestion

A

Hydrolysis protein➡️ AA & di/tri-peptides➡️ blood

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5
Q

CHO digestion

A

Hydrolysis polysacc:

  1. Mammal enz: monosacc➡️blood
  2. Bact enz: VFA➡️blood
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6
Q

Fat digestion

A

Hydrolysis triglycerides➡️ micelles➡️

Glycerol + glycerides + FFA ➡️ reester triglycerides in intestines➡️ chylomicra ➡️lymph

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7
Q

Contraction Modes

A

Phasic: timed by slow wave=peristalsis
Tonic: long term contraction, sm M property = ext sphincter

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8
Q

SI Paracellular ion transport

A

Leaky TJ: move ions as

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9
Q

LI Paracellular ion transport

A

Tight TJ: NaCl conserv & water reabs

Dehydrate feces

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10
Q

Ephaptic conduction

A

⚡️Synctium myocyte sheet

Gap jt

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11
Q

Slow waves

A

Regular oscillations in Vm due to ICC

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12
Q

Spike potential

A

When depol phase of slow wave passes threshold ✅VG Ca2+ CH ✅contraction

Neuroendocrine sys can change SW

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13
Q

Pacemakers

A

Anatomical sites where SW exceeds threshold

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