Bio 169 Exam 3 (Answered) 231 Questions and
Correct Answers With Complete Verified Solution, 100%
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Main function of respiratory system
Gas exchange
Other functions of the respiratory system
Mucous membrane, Speech, pH balance, smell
Cardiovascular system with gases
Carries O2 to tissues and return CO2 to lungs
Two parts of respiratory tract
Upper and lower
What organs in upper respiratory tract
Nose through larynx
What organs in lower respiratory tract
Trachea through lungs
Conducting structures
Nasal cavity to terminal bronchioles; airflow, no gas exchange
Respiratory structures
Respiratory bronchioles and alveoli; gas exchange
What are alveoli
Tiny, air-filled pockets within the lungs where all gas exchange takes place
What is the respiratory mucosa?
Lines the conducting portion of respiratory system
What does the respiratory mucosa consist of?
Pseudostratified epithelium and lamina propria (loose connective tissue)
One layer; they all touch the basement membrane
Goblet cells and cilia working together
Goblet cells secrete mucus which traps particles then cilia propels mucus out of respiratory tract
,What is the lamina propria
Loose connective tissue under epithelia in the upper respiratory system, trachea, and bronchi
3 main functions of the nose
1) warm air
2) cleanse air
3) humidifies air
Nasal hairs
first particle filtration system
Nasal septum
divides nasal cavity into left and right
Olfactory region
superior portion of nasal cavity where we get sense of smell
What are conchae/turbinates
Projections off wall of nasal cavity that cleanse, warm, and humidify air
What are meatuses
Narrow air passages beneath each conchae
Narrowness and turbulence: ensures air contacts mucous membranes
Hard palate
Floor of nasal cavity
Separates nasal and oral cavities
Soft palate
Extends from hard palate
Divides nasopharynx and oropharynx
What is the pharynx
the throat
3 regions of the pharynx
1) Nasopharynx
2) oropharynx
3) laryngopharynx
What are the common pathways for food and air
oropharynx and laryngopharynx
, Nasopharynx
Superior portion of the pharynx
Contains pharyngeal tonsils and auditory tubes
What lines the nasopharynx
Pseudostratified epithelium
Oropharynx
Middle portion of pharynx
Contains palatine and lingual tonsils
What lines the oropharynx
Stratified squamous epithelium
Laryngopharynx
Inferior portion of the pharynx
Esophagus begins here
What lines the laryngopharynx
Stratified squamous epithelium
Larynx
Voice box
Contains the glottis
Functions of the larynx
1) keep food/water out of airway
2) sound production (glottis and vocal folds)
3 cartilages of the larynx
Thyroid cartilage, cricoid cartilage, and epiglottis
Thyroid cartilage function and type
Protect
Hyaline cartilage
Cricoid cartilage function and type
Protect; connects larynx to trachea
Hyaline cartilage
Epiglottis function and type
Cover larynx opening so no food/liquid can enter
Elastic cartilage
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