Respiratory System Flashcards

1
Q

– from the right side of the heart carry deoxygenated blood to the lungs

A

pulmonary arteries

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2
Q

oxygen that enters the lungs will be distributed to – in the erythrocytes within the capillaries that branch off the pulmonary arteries that surround the alveoli

A

hemoglobin

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3
Q

carbon dioxide will – into the alveoli from the pulmonary arteries to be exhaled

A

diffuse

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4
Q

oxygenated blood will travel to the left side of the heart via –

A

pulmonary veins

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5
Q

respiratory structures are also responsible for pH regulation, vocal communication, sense of smell and protection from–

A

infectious agents and particles

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6
Q

respiratory system is essentially a series of – that conduct air into the alveoli located in the lung tissues

A

tubes

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7
Q

because the respiratory system is a – system it is vulnerable to infection

A

open

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8
Q

in the nose and pharynx air is warmed to body temperature, – so that gas exchange can occur and filtered

A

moisturized

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9
Q

nose and pharynx are covered with a – that helps prevent desiccation of the tissues and collects particles and microbes that may enter the system

A

mucous membrane

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10
Q

nose is particularly well suited to filtration because it has – and hair to help trap substances

A

cilia

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11
Q

T/F: Filtration in the nose and pharynx will catch all particles

A

false

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12
Q

during breathing, air will flow through the – which is the opening of the larynx

A

glottis

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13
Q

voice box

A

larynx

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14
Q

larynx is made of – and vocal cords that produce sound as they vibrate

A

cartilage

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15
Q

air flows from larynx > –> lower respiratory tract

A

trachea

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16
Q

trachea is supported by – of cartilage

A

C-shaped rings

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17
Q

interior surface of trachea is covered with – and cilia

A

mucus

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18
Q

trachea > – > bronchioles

A

bronchi

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19
Q

– surrounding bronchioles can adjust their diameter to meet oxygen demands

A

smooth muscles

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20
Q

bronchioles terminate in tiny air sacs called –

A

alveoli

21
Q

alveoli are numerous, providing lots of surface area for gas exchange, and are made of – that allows for easy gas exchange with the capillaries that surround them

A

simple squamous epithelium

22
Q

lungs are a collection of – tissue including the bronchioles and alveoli

A

resilient

23
Q

in humans, the right lung has – lobes of tissue while the left lung only has two lobes

A

three

24
Q

each lung is surrounded by a fluid-filled –

A

pleural membrane

25
Q

a – produced by the tissues decreases surface tension in the alveoli which keeps the alveoli inflated and functioning

A

surfactant fluid

26
Q

surfactant fluid prevents alveolar –

A

collapse

27
Q

T/F: Without surfactant to relieve surface tension, the lungs are unable to function

A

true

28
Q

gas exchange in the lungs results from the flow of gases because of -

A

pressure gradients

29
Q

in order to get air into the lungs, the volume of the chest cavity must – which decreases the pressure

A

increase

30
Q

inhalation/inspiration occurs when the diaphragm – and pushes down

A

contracts

31
Q

thin muscle that separates the thoracic cavity

A

diaphragm

32
Q

– of the rib cage also assist in inhalation by contracting to help move the rib cage up and out

A

intercostal muscles

33
Q

When the diaphragm and intercostal muscles – the volume of the chest cavity decreases, which results in a higher level of pressure inside the chest cavity

A

relax

34
Q

volume of the chest cavity decreases, which results in a higher level of pressure inside the chest cavity which forces air to – the lungs

A

leave

35
Q

rate of ventilation is control by the –

A

medulla oblongata

36
Q

– is innervated and neurally connected to the area of the medulla that controls breathing

A

diaphragm

37
Q

activity of these inspiratory neurons causes contraction of the diaphragm, which is followed by a period of – that allows for relaxation of the diaphragm and exhalation

A

inactivity

38
Q

in a relaxed situation, the diaphragm is stimulated between – times per minute

A

12 and 15

39
Q

T/F: during times of increased oxygen demand and excessive carbon dioxide production, the rate of stimulation can increase significantly

A

true

40
Q

breathing rate is influenced by – levels

A

CO2

41
Q

CO2 levels are monitored by – located in the brain and certain large blood vessels

A

chemoreceptors

42
Q

As CO2 levels increase, pH – since carbonic acid levels rise thus breathing rate must increase to eliminate excess CO2 which in turn increases O2 levels

A

decreases

43
Q

gas concentrations can be measured as –

A

partial pressures

44
Q

after inhalation the partial pressure of oxygen in the alveoli is – than the partial pressure of oxygen in the capillaries surrounding the alveoli, which are branches of the pulmonary arteries

A

greater

45
Q

immediately following inhalation, CO2 levels will be – in the alveoli and high in the capillaries (diffusion will move CO2 into alveoli and be exhaled)

A

low

46
Q

CO2 exchange has an important role in the maintenance of – balance within the body

A

acid-base

47
Q

CO2 to water –>

A

carbonic acid

48
Q

carbonic acid

A

bicarbonate ion and hydrogen ions

49
Q

– help buffer pH

A

bicarbonate ion