. 2016 Jan 6;310(6):R502–R512. doi: 10.1152/ajpregu.00054.2015

Table 1.

Concentrations of plasma thyroid stimulating hormone, total and free T₃, T₄, insulin, and glucose from northern elephant seal pups before (0 min) and 10, 30, 60, 90, and 120 min postinsulin infusion during the early and late fasting period, and postglucose infusion during the late fasting period

	0 min	10 min	30 min	60 min	90 min	120 min
Early Insulin Infusion
TSH, ng/ml	0.09 ± 0.07	0.08 ± 0.04				0.09 ± 0.05
tT3, ng/ml	1.5 ± 0.1	1.6 ± 0.1	1.4 ± 0.1	1.7 ± 0.1	1.4 ± 0.5	1.4 ± 0.4
tT4, ng/ml	37 ± 6	34 ± 4	33 ± 5	38 ± 6	33 ± 5	39 ± 7
Insulin,^a μU/ml	3.2 ± 0.02	171 ± 9^*	25 ± 1^*	6 ± 1^*	2.4 ± 0.4	2.1 ± 0.5
Glucose^a mg/dl	174 ± 8	159 ± 7	133 ± 11^*	107 ± 16^*	101 ± 11^*	109 ± 9^*
Late Insulin Infusion
TSH, ng/ml	0.09 ± 0.01	0.07 ± 0.01				0.08 ± 0.01
tT3, ng/ml	1.4 ± 0.1	2.3 ± 0.7	1.7 ± 0.9	1.5 ± 0.1	1.6 ± 0.2	1.3 ± 0.2
tT4, ng/ml	36 ± 3	38 ± 7	32 ± 5	41 ± 4	31 ± 5	44 ± 9
Insulin^a, μU/ml	1.9 ± 1	138 ± 30^*	21 ± 4^*	4 ± 1^*	2.1 ± 0.4	1.4 ± 0.2
Glucose^a, mg/dl	135 ± 9	128 ± 8	105 ± 5^*	77 ± 5^*	64 ± 5^*	62 ± 5^*
Late Glucose Infusion
TSH, ng/ml	0.10 ± 0.08	0.10 ± 0.04				0.09 ± 0.03
fT3, pg/ml	1.2 ± 0.10	1.1 ± 0.08		1.0 ± 0.10	1.0 ± 0.03	1.0 ± 0.04
tT3, ng/ml	1.3 ± 0.1	1.2 ± 0.1		1.2 ± 0.04	1.2 ± 0.1	1.2 ± 0.1
fT4, pg/ml	10.8 ± 1.0	10.5 ± 0.6		9.8 ± 0.3	9.9 ± 0.8	10.6 ± 0.4
tT4, ng/ml	43 ± 2	40 ± 2		42 ± 1	40 ± 2	43 ± 1
Insulin^b, μU/ml	1.3 ± 0.1	1.8 ± 0.3		2.1 ± 0.3^*	—	2.0 ± 0.2^*
Glucose^b, mg/dl	128 ± 9	287 ± 13^‡		222 ± 12^‡	187 ± 8^‡	175 ± 9^‡

Values are expressed as means ± SE. At 30 min, concentrations for glucose and hormones are not shown because they were not available. TSH, plasma thyroid stimulating hormone; t, total; f, free; T3, triiodothyronine; T4, thyroxine;

^{^a}

Insulin and glucose values were adapted from Viscarra et al. (49).

^{^b}

Glucose values were adapted from Viscarra et al. (48).

^{^*}

P < 0.05;

^{^‡}

P < 0.01.