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Lab 7: Respiratory System > Bronchioles > Flashcards

Bronchioles Flashcards

1
Q

Each tertiary bronchus branches into multiple

A

bronchioles

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2
Q

Bronchioles branch into

A

terminal bronchioles

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3
Q

One tertiary bronchus forms about ____terminal
bronchioles

A

6500

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4
Q

Bronchioles
* Have no ____
* Are dominated by ___

A
  • cartilage
    -smooth muscle
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5
Q
  • Autonomic Control
  • Regulates _____
  • Controls diameter of _______
  • Controls airflow and resistance in ______
A

smooth muscle
bronchioles
lungs

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6
Q

Bronchodilation

A
  • Dilation of bronchial airways
  • Caused by sympathetic ANS activation
  • Reduces resistance
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7
Q

Bronchoconstriction

A
  • Constricts bronchi
  • Caused by:
  • Parasympathetic ANS activation
  • Histamine release (allergic reactions
  • Constricts bronchi
  • Caused by:
  • Parasympathetic ANS activation
  • Histamine release (allergic reactions
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8
Q
  • Asthma occurs when there is and this can cayse
A
  • Excessive stimulation and bronchoconstriction
  • Stimulation severely restricts airflow
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9
Q
  • Trabeculae
A

Fibrous connective tissue partitions from root of
lung
* Contain supportive tissues and lymphatic vessels
* Branch repeatedly
* Divide lobes into increasingly smaller
compartment

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10
Q
  • Pulmonary lobules are divided by the smallest
A

trabecular partitions (interlobular septa)

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11
Q
  • Each terminal bronchiole delivers air to a single
A

pulmonary lobule

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12
Q

Each pulmonary lobule is supplied by pulmonary

A

arteries and veins

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13
Q
  • Each terminal bronchiole branches to form several
    respiratory bronchioles, where
A

gas exchange takes place

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14
Q

Respiratory bronchioles are connected to alveoli
along

A

alveolar duct

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15
Q

Alveolar ducts end at

A

t alveolar sacs
* Common chambers connected to many individual
alveoli

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16
Q

Each alveolus has an extensive network of
capillaries
* Surrounded

A

by elastic fiber

17
Q

Alveolar Epithelium
* Consists of simple squamous epithelium
* Consists of thin, delicate———–controlld by——

A

type I pneumocytes
patrolled by alveolar macrophages (dust cells)
* Contains type II pneumocytes (septal cells) that produce sufectant

18
Q

Surfactant

A

Is an oily secretion
* Contains phospholipids and proteins
* Coats alveolar surfaces and reduces surface
tensio

19
Q

Gas Pressure and Volume
* Boyle’s Law
* Defines the relationship between gas pressure and
volume

A

P = 1/V

20
Q
  • In a contained gas:
A
  • External pressure forces molecules closer together
  • Movement of gas molecules exerts pressure on
    containe

Lab 7: Respiratory System (10 decks)

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