Please answer all questions

1		Air passing along the respiratory tract to the lungs is ______.
			A)	cleansed
			B)	warmed
			C)	moistened
			D)	all of the above
2		The nasal cavities empty into the __________.
			A)	eustachian tubes
			B)	lacrimal glands
			C)	larynx
			D)	nasopharynx
3		The __________ tubes lead from the nasopharynx to the middle ears.
			A)	bronchi
			B)	auditory
			C)	nasal
			D)	trachea
4		The pharynx consists of three parts except _____________.
			A)	nasopharynx
			B)	oropharynx
			C)	trachea
			D)	laryngopharynx
5		The __________ houses the vocal cords.
			A)	larynx
			B)	bronchus
			C)	pharynx
			D)	esophagus
6		The trachea divides into two __________ that lead to the lungs.
			A)	glotti
			B)	tracheae
			C)	bronchi
			D)	bronchioles
7		Each bronchiole terminates in an elongated space enclosed by a multitude of air pockets called __________.
			A)	the glottis
			B)	alveoli
			C)	the larynx
			D)	the pharynx
8		Each alveolar sac is surrounded by __________ carrying blood.
			A)	arteries
			B)	veins
			C)	capillaries
9		The amount of air moved in and out with each breath is called __________.
			A)	inspiratory reserve volume
			B)	tidal volume
			C)	expiratory reserve volume
			D)	vital capacity
10		The respiratory center that triggers inspiration is located in the _______.
			A)	thorax
			B)	alveoli
			C)	medulla
11		Chemical receptors in carotid bodies respond to _______.
			A)	hydrogen ion concentration
			B)	levels of carbon dioxide in the blood
			C)	levels of oxygen in the blood
			D)	all of the above
12		During expiration, __________ pressure in the thoracic cavity causes air to leave the lungs.
			A)	increased
			B)	decreased
			C)	gradually decreasing
			D)	no
13		During __________, the respiratory pigment hemoglobin combines with oxygen to form oxyhemoglobin in the pulmonary capillaries.
			A)	internal respiration
			B)	external respiration
			C)	anaerobic respiration
			D)	ventilation
14		The exchange of oxygen and carbon dioxide between alveolar air and blood is governed by _______.
			A)	gravity
			B)	blood pressure
			C)	diffusion
15		Most of the carbon dioxide is being carried as __________ as blood enters the pulmonary capillaries.
			A)	carbaminohemoglobin
			B)	calcium carbonate
			C)	bicarbonate ions
			D)	hydrogen ions
16		Chronic bronchitis is caused by ______.
			A)	a bacterial infection
			B)	a viral infection
			C)	a degenerative change in the bronchi
17		Inhaling particles such as silica, coal dust, and asbestos can lead to _______.
			A)	pneumonia
			B)	tuberculosis
			C)	pulmonary fibrosis
			D)	all of the above
18		The events involved in the formation of lung cancer are ______.
			A)	thickening and callusing of cells lining the bronchi
			B)	loss of cilia
			C)	formation of cells with atypical nuclei
			D)	all of the above
19		Ventilation is another term for___________.
			A)	inspiration
			B)	expiration
			C)	breathing
			D)	inhalation
			E)	exhalation
20		The open part of the C-shaped rings of tracheal cartilage allows the __________ to expand when swallowing.
			A)	stomach
			B)	esophagus
			C)	stomach
			D)	pharynx
21		This lowers the surface tension and prevents the alveoli from closing.
			A)	pleural fluid
			B)	capillaries
			C)	oxyhemoglobin
			D)	surfactant
22		The amount of air left in the lungs after a very deep exhalation is called the ____________.
			A)	residual volume
			B)	vital capacity
			C)	expiratory reserve volume
			D)	inspiratory reserve volume
23		The active phase of ventilation is____________.
			A)	expiration
			B)	inspiration
			C)	exhalation
			D)	voluntarily controlling breathing.
24		______________ is an infection of the primary and secondary bronchi.
			A)	sinusitis
			B)	chronic bronchi
			C)	laryngitis
			D)	acute bronchitis
25		By changing the ________ on the vocal cords, pitch of the voice is regulated.
			A)	position
			B)	location
			C)	tension
			D)	vibration