PHYS20008 Lecture Notes - Lecture 23: Glycogen, Circulatory System, Baroreceptor
27 Jul 2018
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* there is an increased metabolic demand, so we need to increase the delivery to tissues we need to nourish working muscles (we need to deliver oxygen and pick up waste products like carbon dioxide and lactic acid). So, the demand on the cardiovascular system increases dramatically because we need to move more product around the body. * temperature control (heat production resolved through peripheral vasodilation) & fluid loss. * delivery of nutrients the demand varies enormously, so the blood flow needs to be redistributed appropriately. Answers: 2,3 (cid:449)e"re looki(cid:374)g at the i(cid:373)(cid:373)ediate effe(cid:272)t of the neurons. * the sympathetic nervous system acts on alpha 1 receptor on the walls of blood vessels causes vasoconstriction. Circulating adrenaline acting on beta 2 receptors that cause dilation, but this is only in select vessels. * anticipation of exercise and initial movements cause physiological changes in the body: Increased myocardial contractility heart contracts harder.
