The effect of activity on respiratory values for V. mertensi
| Metabolism . | . | . | Ventilation . | . | . | Oxygen transport . | . | . | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Exercise . | Recovery . | . | Exercise . | Recovery . | . | Exercise . | Recovery . | ||||||
| V̇O2kg-1 (ml O2 kg-1 min-1) | 14.0±4.0*(416) | 10.8±2.6*(324) | PAO2 (mmHg) | 126±6 (104) | 130±6*(107) | PaO2 (mmHg) | 104±6 (104) | 115±14*(114) | ||||||
| V̇CO2kg-1 (ml CO2 kg-1 min-1) | 11.7±2.5*(477) | 11.5±2.6*(474) | PACO2 (mmHg) | 31±8 (113) | 29±8 (116) | PaCO2 (mmHg) | 29±6 (99) | 30±7 (102) | ||||||
| R | 0.86±0.21 (122) | 1.08±0.18*(152) | V̇E kg-1 (ml kg-1 min-1) | 368±100*(214) | 374±260*(207) | pHa | 7.378±0.166 (98) | 7.275±0.198 (97) | ||||||
| V̇A kg-1 (ml kg-1 min-1) | 356±86*(475) | 334±74*(445) | CaO2 (mmol l-1) | 3.7±1.1 (99) | 3.8±1.1 (98) | |||||||||
| VT kg-1 (ml kg-1) | 38.3±17.3*(151) | 37.5±15.8*(148) | Pv̄O2 (mmHg) | 43±9*(72) | 52±10 (85) | |||||||||
| f (min-1) | 10.2±2.6*(249) | 10.4±1.9*(254) | Pv̄CO2 (mmHg) | 48±9*(140) | 52±10*(151) | |||||||||
| TI (s) | 1.7±0.6*(74) | 2.0±0.4 (87) | pHv̄ | 7.265±0.175 (97) | 7.148±0.227 (95) | |||||||||
| TE (s) | 1.3±0.4*(76) | 1.7±0.5 (100) | Cv̄O2 (mmol l-1) | 0.5±0.3*(22) | 1.2±0.6*(47) | |||||||||
| TP (s) | 4.3±1.8*(32) | 3.2±1.1*(24) | Q̇tot kg-1 (ml kg-1 min-1) | 209±61*(165) | 214±102*(169) | |||||||||
| TTOT(s) | 8.6±3.5*(49) | 7.8±2.5*(45) | Q̇shunt/Q̇tot(%) | — | — | |||||||||
| V̇E/V̇O2 | 27.4±11.1 (102) | 30.8±8.7 (115) | fH (min-1) | 120±14*(162) | 106±11*(143) | |||||||||
| V̇E/V̇CO2 | 35.4±11.0 (93) | 35.6±12.3 (94) | Q̇tot/V̇O2 | 15.6±5*(45) | 20.6±10.2*(59) | |||||||||
| [La]a (mmol l-1) | 8.5±3.2*(266) | 9.7±4.4*(303) | ||||||||||||
| VR kg-1 (ml kg-1) | 114±56 (133) | — | Hct | 29.3±2.9 (103) | 28.6±1.6 (97) | |||||||||
| DLCO (ml kg-1 min-1mmHg-1) | 0.120±0.032 (103) | — | [Hb] (g dl-1) | 7.4±2.3 (104) | 7.1±1.6 (99) | |||||||||
| Metabolism . | . | . | Ventilation . | . | . | Oxygen transport . | . | . | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| . | Exercise . | Recovery . | . | Exercise . | Recovery . | . | Exercise . | Recovery . | ||||||
| V̇O2kg-1 (ml O2 kg-1 min-1) | 14.0±4.0*(416) | 10.8±2.6*(324) | PAO2 (mmHg) | 126±6 (104) | 130±6*(107) | PaO2 (mmHg) | 104±6 (104) | 115±14*(114) | ||||||
| V̇CO2kg-1 (ml CO2 kg-1 min-1) | 11.7±2.5*(477) | 11.5±2.6*(474) | PACO2 (mmHg) | 31±8 (113) | 29±8 (116) | PaCO2 (mmHg) | 29±6 (99) | 30±7 (102) | ||||||
| R | 0.86±0.21 (122) | 1.08±0.18*(152) | V̇E kg-1 (ml kg-1 min-1) | 368±100*(214) | 374±260*(207) | pHa | 7.378±0.166 (98) | 7.275±0.198 (97) | ||||||
| V̇A kg-1 (ml kg-1 min-1) | 356±86*(475) | 334±74*(445) | CaO2 (mmol l-1) | 3.7±1.1 (99) | 3.8±1.1 (98) | |||||||||
| VT kg-1 (ml kg-1) | 38.3±17.3*(151) | 37.5±15.8*(148) | Pv̄O2 (mmHg) | 43±9*(72) | 52±10 (85) | |||||||||
| f (min-1) | 10.2±2.6*(249) | 10.4±1.9*(254) | Pv̄CO2 (mmHg) | 48±9*(140) | 52±10*(151) | |||||||||
| TI (s) | 1.7±0.6*(74) | 2.0±0.4 (87) | pHv̄ | 7.265±0.175 (97) | 7.148±0.227 (95) | |||||||||
| TE (s) | 1.3±0.4*(76) | 1.7±0.5 (100) | Cv̄O2 (mmol l-1) | 0.5±0.3*(22) | 1.2±0.6*(47) | |||||||||
| TP (s) | 4.3±1.8*(32) | 3.2±1.1*(24) | Q̇tot kg-1 (ml kg-1 min-1) | 209±61*(165) | 214±102*(169) | |||||||||
| TTOT(s) | 8.6±3.5*(49) | 7.8±2.5*(45) | Q̇shunt/Q̇tot(%) | — | — | |||||||||
| V̇E/V̇O2 | 27.4±11.1 (102) | 30.8±8.7 (115) | fH (min-1) | 120±14*(162) | 106±11*(143) | |||||||||
| V̇E/V̇CO2 | 35.4±11.0 (93) | 35.6±12.3 (94) | Q̇tot/V̇O2 | 15.6±5*(45) | 20.6±10.2*(59) | |||||||||
| [La]a (mmol l-1) | 8.5±3.2*(266) | 9.7±4.4*(303) | ||||||||||||
| VR kg-1 (ml kg-1) | 114±56 (133) | — | Hct | 29.3±2.9 (103) | 28.6±1.6 (97) | |||||||||
| DLCO (ml kg-1 min-1mmHg-1) | 0.120±0.032 (103) | — | [Hb] (g dl-1) | 7.4±2.3 (104) | 7.1±1.6 (99) | |||||||||
Activity was for a lizard running on a treadmill at an average speed of 0.33 m s-1 until exhaustion (11.8 min).
Values presented for exercise are an average of the three measurements made during the period of activity; those presented for recovery were made 2 min after exercise ceased.
Values are means ± 1 S.D.; values in parentheses are a percentage of the resting values presented in Table 1.
For metabolism and blood variables N=6; for ventilation N=5, except for PACO2 where N=3.
Abbreviations as in main text.
Significant difference from the value at rest.