_IMG_45_12GlucoseHomeostasis.jpg
<strong>Negative feedback in glucose homeostasis.</strong>

<ol>
<li>A rise in blood <strong>glucose</strong>
causes release of <b>insulin</b> from <b>beta</b> cells the <b>pancreas</b>, promoting <strong>glucose</strong>
<samp>uptake</samp> in cells and <samp>storage</samp> as _FIG_../ch05/glycogen.html	<strong>glycogen</strong>
in the <b>liver</b>.

<br><br><br>

<li>A fall in blood <strong>glucose</strong>
stimulates <b>alpha</b> cells in the <b>pancreas</b> to secrete <b>glucagon</b>,
which causes the <b>liver</b> to break down <strong>glycogen</strong> and release <strong>glucose</strong>.
</ol>