Gas exchange at the respiratory membrane is efficient b/c

A. the difference in partial press are substantial

B. The gases are lipid soluble 

C. surface areas for exhange are large

D. all

Venous blood renturing to the heart contains CO2 w/ a Partial press of 50mm Hg. This person must be

A. Sleeping

B. Playing soccer

Henry's Law of Solubility is best described as:

A. movement of a gas into a solution due to a press gradient.

B. gasses are lipid soluble, not water soluble 

For any partial press of O2, if the temp incr.

A. the amount of O2 released by hemoglobin decreases

B. the amount of O2 released by hemoglobin increases

Which of the following substrates can be used by a cardiac myocyte to produce ATP?

A. glucose

B. lactate

C. Lipids

D. all

The respiratory centers of he medulla include

A. DRG

B. VRG

C. the pons

D. 2 of the above

The nasal cavities have a large surface are associated w/ which of the following functions?

A warm and humidify inhaled air

B. gas exchange

A warm and humidify inhaled air

"dead space" is a term that refers to

A. the volume of gas reaches the alveoli

B. the volume of gas that remains in the lungs after inhalation and expiration

Decreased CO2 levels & a normal pH in the tissues

A would promote decreased blood flow to the tissues

B. indicated decreased metabolism

A would promote decreased blood flow to the tissues

Inside the RBC, CO2 must be transformed to what molecule that can be carried in the plasma?

A. H2CO3

B. HCO3-

Which of the following statements about CO2 is false?

A. its concentration in the blood is decreased by hyperventilation

B. as it increases in the blood, pH of the cerebrospinal fluid increases

C. more CO2 is dissolved in the blood that in bound to hemoglobin.

D. Co2 concentration is higher in venous blood than arterial blood

E. all are true

Among its other purpose, the Valsalva maneuver is used

A. as part of the procedure for giving CPR

B. to aid in defecaion and urination

According to Dalton's law, if the % of O2 in room was 25% & the total atmospheric press was 600mmHg, the partial press of O2 would be?

A. 500mmHg

B. 150mmHg

The press that exists btwn the partial & the visceral pleura __ w/ expansion of the thoracic cavity

A. decreases

B. Increases

Trace the route of aire flor thru the resp. tract?

A. pahrynx-larynx-bronchi-trachae-bronchioles

B.  pahrynx-larynx-trachae-bronchi-bronchioles

B.  pahrynx-larynx-trachae-bronchi-bronchioles

Expiration of a tidal volume is accomplished by

A. increasing the activity of the neurons in the VRG

B. passive, elastic recoil of the lungs

B. passive, elastic recoil of the lungs

which of the following alters the shape and therefore the loading characteristics of hemoglobin?

A. O2

B. temp

C. acidic pH

D. all

Mucous is secreted by __ cells in the ___ portion of the resp. tract?

A. muscous; conducting 

B. goblet; conducting

Your tidal volume is 500ml, ur inspiratory reserve volume is 350ml, ur anatomical dead space is 150 ml & ur respiratory rate is 10 breaths/mins. what is ur resting alveolar ventilation rate?

A. 3500ml/min

B. 4L/min

A. 3500ml/min

the __ that surrounds the trachae and upper brochial tube functions to __

A. hyaline cartilage; keep airway from collasping

B. Elastic cartilage; keeps airway flexible

A. hyaline cartilage; keep airway from collasping

Surface tension at the surface of the H20 & air in alveoli resists inspirations. To decrease this surface tension, the great (type II) alveola cells secrete?

A. mucus

B. Surfactant

The aortic and cartoid bodies

A. are thermo-receptors

B. respond to changes in arterial O2 press

An airway tube located in the conducting portion of the respiratory system is lined w/:

a. simple cubodial epithelium

B. pseudostratified ciliated columnar epithelium and goblet (muscous) cells

When B-cells are activated, they clone into _ that release _

A. Macrophage;cytokines

B Plasma Cells; antibodies

Natural passive immunity is:

a. vaccinations

b. mother to child

As HCO3- moves into the plasma from the RBC, the resulting electrical imbalances must be countered by moving?

A. Cl- into the cell

B. Cl- out of the cell

A. Cl- into the cell

Which of the following are examples of hormones responses?

A. a dec. in membrane permability

B. an increase in protein synthesis

C. an increase in cell division

D. All

From ur tidal volume u inhaled as much air as possible, this volume is referred to as the __

A. inspiratory reserve volume (IRV)
B. ERV 

Partial press is ___

A. the solubility of gas

B. the seperate contribuation of press by each individual gas comprising air