Q:l Explainl thel stepsl necessaryl forl inhalation.

Q:l Explainl thel stepsl necessaryl forl inhalation.

Answer:

Negativel pressurel isl usedl tol movel airl intol thel lungs:l Al negativel pressurel environmentl isl createdl insidel thel lungsl byl thel pleurall space.l Thel motionl ofl thel ribl cage:l thel ribl cagel liftsl superiorlyl andl anteriorlyl tol openl andl expandl thel lungs.Thel diaphragm:l Thel diaphragml isl flattenedl asl itl contracts,l pullingl thel lungsl open.l Asl thel thoracicl cavityl expandsl andl lungl volumel increases,l thel densityl ofl thel densityl ofl thel gasesl fillingl thel lungsl decreases.l Becausel airl pressurel outsidel ofl thel lungsl isl nowl greaterl thanl insidel (wherel therel isl negativel pressure),l airl willl naturallyl flowl intol thel lungs.

Q:l Whatl isl meantl thatl "negativel pressure"l isl createdl insidel thel lungs?

Answer:

Thisl meansl thatl thel pressurel insidel thisl spacel isl lessl thanl thatl ofl thel atmosphere,l allowingl airl tol naturallyl flowl intol thel lungs.

Q:l Truel orl false:l Exhalationl isl anl activel process.

Answer:

Exhalationl (orl expiration)l passivelyl occurs.l Whenl thel ribl cagel isl loweredl andl thel diaphragml rises,l thoracicl pressurel increasesl andl thereforel airl movesl outl ofl thel lungsl wherel thel pressurel isl lower.

Q:l Whatl isl thel functionl ofl hemoglobin?

BIOLl251/l BIOL251l Modulel 2l W/Labl

Exam:l (Latestl 2026/l 2027l Update)l 100%l

Verifiedl Questionsl &l Answersl |l Gradel A 1 / 3

Answer:

Hemoglobinl combinesl withl thel oxygenl enteringl thel bloodl tol carryl thel oxygenl inl thel bloodl systeml froml thel lungsl tol thel cellsl ofl thel tissues.

Q:l Whatl musclel isl largelyl responsiblel forl providingl movementl forl respiration?

Answer:

diaphragm

Q:l Ultimatelyl gasl exchangel occursl where?

Answer:

Respiratoryl bronchiolesl andl pulmonaryl alveoli

Q:l Mostl ofl thel carbonl dioxidel isl transportedl inl thel bloodl inl whatl form?

Answer:

bicarbonatel ion

Q:l Reviewl alll respiratoryl physiologyl measurementl termsl andl knowl definitions.

Answer:

Q:l Boyle'sl lawl statesl what?

Answer:

Gasl volumel isl inverselyl proportionall tol pressure.

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Q:l Therel arel threel gasesl inl al tank.l Thel partiall pressurel ofl thel firstl isl 120l mmHg,l thel pressurel ofl thel secondl isl 320l mmHg.l Whatl isl thel partiall pressurel ofl thel thirdl atl 1l atm?

Answer:

120l mmHgl +l 320l mmHgl =l 440l mmHg.l 760l mmHgl -l 440l mmHgl =320l mml Hg.l (Thel answerl isl 320l mml Hg)l **Rememberl thatl 1l atml =l 760l mml Hg.

Q:l Thisl lawl helpsl explainl whyl warmingl thel airl isl beneficiall tol thel respiratoryl system.

Answer:

Charles'sl Law

Q:l Thisl isl thel amountl ofl airl ablel tol bel exhaledl beyondl normall exhalation.

Answer:

Expiratoryl reservel volumel (typicallyl aroundl 1200mL)

Q:l Thisl isl thel amountl ofl airl inhaledl andl exhaledl inl onel cyclel ofl quietl breathing.

Answer:

Tidall volumel (TV)

Q:l Whatl isl cysticl fibrosis?

Answer:

Al seriousl geneticl diseasel ofl excretoryl glands,l affectingl lungsl andl otherl organs;l itl causesl productionl ofl veryl thickl mucusl thatl interferesl withl normall digestionl andl breathing.

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