Changes in serum potassium concentration with exercise in Hereford calves: effects of adrenalectomy.
1. Serum potassium concentration [K+] was measured pre- and postadrenalectomy in three Hereford steer calves before, during and following 3.5 min exercise at their maximal speed capability. 2. Both before and after adrenalectomy, serum [K+] increased an average of 2.4 mEq.1(-1) during exercise and was at control levels 10 min postexercise. 3. Hormones from neither the adrenal cortex nor the adrenal medulla influence serum [K+] dynamics during acute exercise.
Fosha-Dolezal
S R
SR
Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan 66506.
Avery
T B
TB
Wagner
W C
WC
Fedde
M R
MR
D000311:Adrenal Glands / Q000502:physiology*; D000315:Adrenalectomy; D000818:Animals; D002417:Cattle / Q000097:blood / Q000502:physiology*; D006339:Heart Rate; D006400:Hematocrit; D007773:Lactates / Q000097:blood; D019344:Lactic Acid; D008297:Male; D005082:Physical Exertion; D011188:Potassium / Q000097:blood*
D007773:Lactates; D019344:Lactic Acid; D011188:Potassium