Biology
Biology, 20.08.2019 03:00, keilamurillo5901

The tiny hollow air sacs in the lungs where gas exchange takes place are the a. alveoli b. lymph nodes c. capillaries d. bronchioles

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Biology, 15.07.2019 07:00, babylear
1. which list describes the path oxygen takes to the blood? a. bronchi, alveolar sacs, alveoli, capillaries b. trachea, bronchi, capillaries, alveoli c. larynx, trachea, bronchi, capillaries d. pharynx, larynx, capillaries, alveoli 2. what function do the alveolar sacs serve in the respiratory system? a. cool and clean the air before it moves to the capillaries b. warm and clean the air before it moves to the alveoli c. increase surface area for gas exchange with the capillaries d. decrease pathogens in the air before it moves to the alveoli 3. how does air pressure control expiration? a. a decrease in air pressure within the lungs allows air to flow in. b. an increase in air pressure within the lungs allows air to flow out. c. a decrease in air pressure within the lungs causes them to contract. d. an increase in air pressure within the lungs causes them to expand. 4. what
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Health, 20.07.2019 13:00, uh8hardiek
1) which choice lists the structures adapted for permitting air flow from the external environment to the human lungs in the correct order? a) nasal cavity, bronchi, bronchioles, pharynx, trachea b) nasal cavity, trachea, pharynx, bronchi, bronchioles c) nasal cavity, pharynx, trachea, bronchi, bronchioles d) nasal cavity, bronchioles, trachea, pharynx, bronchi 2) a structural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage 3) in order for gas exchange to take place, alveoli must be closely associated with: a) capillaries b) villi c) veins d) arteries 4) deposits from cigarette smoke interfere with the normal functioning of cilia in the: a) trachea b) esophagus c) bronchioles d) pharynx 5) the exchange of air between the human body and the environment is the result of coordinated contractions of the muscles of the rib cage and the: a) lung b) diaphragm c) heart d) pleura 6) the site of gas exchange in humans is the: a) nasal cavity b) trachea c) pleura d) alveoli 7) a disease involving the breakdown of the air sacs in the lungs is: a) asthma b) emphysema c) pneumonia d) bronchit 12) which structure warms & filters air as it is inhaled?
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Biology, 30.10.2019 22:31, Dustkeeton18
The tiny hollow air sacs where oxygen exchange occurs are a. lymph nodes. b. capillaries. c. alveoli. d. bronchioles.
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