ANAT 261 Lecture : 7. Respiratory System.pdf

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ceruleanprairie-dog589

6 Apr 2012

School

McGill University

Department

Anatomy & Cell Biology

Course

ANAT 261

Professor

Craig Mandato

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Document Summary

The function of the respiratory system is to provide oxygen and remove carbon dioxide from the blood. There are three segments of the respiratory system: Conduction portion: consists of the nasal cavity, nasopharynx, oropharynx, larynx ,trachea, bronchi and bronchioles. We will only look at the system starting at the trachea. The transitional portion is made up of respiratory bronchioles, which have a discontinuous wall. The conducting portion consists of the alveolar duct, alveolar sac and lung alveoli. The conducting portion is meant to warm, humidify and clean the air of any debris. It possesses glands which secrete liquids, to humidify, and mucous, to cling on to any floating debris. Ciliated cells also help remove any foreign particles. The transitional portion has an intermediate function between conducting and respiratory portions. Some gas exchange occurs because of the discontinuous walls, but it also has the same functions as for the conduction portion.

Related Questions

Besides the lungs, are there any other structures (e.g., larynx, trachea, bronchus, bronchioles, pleura) of the respiratory system that are affected by tuberculosis? If so, which structures are affected?

taupeyak758

QUESTION 1

Cellular respiration uses________to produce energy and releases ________as a waste product.

		O₂; CO₂
		CO₂; O₂
		ATP; G3P
		G3P; ATP

5 points

QUESTION 2

Select all of the following that compose the conducting pathways in the respiratory system.

		nasal cavity
		Pharynx
		Larynx
		Trachea
		Bronchi
		Alveoli

5 points

QUESTION 3

Match each structure with its' function.

- A. B. C. D. E. F. G.	Nasal Cavity
- A. B. C. D. E. F. G.	Alveoli
- A. B. C. D. E. F. G.	Larynx
- A. B. C. D. E. F. G.	Trachea
- A. B. C. D. E. F. G.	Bronchi
- A. B. C. D. E. F. G.	Bronchioles
- A. B. C. D. E. F. G.	Pharynx

A.	Throat
B.	Very small branches of bronchi within the lungs.
C.	Larger branching passages for air within the lungs.
D.	Location of gas exchange with the blood.
E.	Carries air from larynx and branches into bronchi.
F.	Location of the voice box, earliest location where only air passes.
G.	Carry air into the pharynx, earliest location of cleaning, warming, and humidifying the air.

8 points

QUESTION 4

Mammals are able to inhale because increasing the volume of the thoracic cavity will decrease the pressure within the lungs. This is called_____

		pump-controlled breathing
		forced inflation breathing
		negative-pressure breathing
		stretch breathing

6 points

QUESTION 5

Indentify which muscles are primarily responsible for quiet (normal, relaxed) inspiration?

		diaphragm
		internal intercostals
		sclaenes
		abdominal muscles

coffeepig115

37) which of the following respiratory structures has the largest cumulative cross-sectional area?

a) bronchioles

b) trachea

c) primary bronchi

d) secondary bronchi

e) alveoli

50) Which of the following molecules is not filtered into Bowmanâs capsule in a health nephron?

A) water

b) plasma proteins

c) Na+

d) Ca+2

glucose

blueduck862

ANAT 261 Lecture : 7. Respiratory System.pdf

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