Isolated Heart Kit

In this lab, learners use the isolated biventer cervicis muscle from a chick to investigate how the curare poison affects muscle contraction, and which drugs may work as an antidote to curare.

In this lab, learners use a guinea pig atria to examine how isoprenaline, propranolol, acetylcholine, atropine, and physostigmine affect the frequency and strength of myocardial contraction.

In this lab, learners use an isolated phrenic-innervated diaphragm muscle preparation to investigate how suxamethonium, tubocurarine, and edrophonium affect neuromuscular transmission.

In this lab, learners use an isolated rabbit heart to investigate the effects of epinephrine, norepinephrine, isoproterenol, isoprenaline, acetylcholine, lidocaine, ouabain and a low potassium solution on heart rate and the force of contraction.

In this lab, learners will apply repetitive electrical stimulation to the sympathetic nerves of the isolated rabbit jejunum. This electrical stimulation inhibits rhythmic output from the enteric nerve plexuses, which in turn leads to relaxation of the intestine and reduced gastrointestinal motility. They will also investigate how the drug guanethidine prevents the release of norepinephrine from sympathetic ("adrenergic") nerve terminals.

In this lab, learners will examine the effects of oxytocin and epinephrine on an isolated uterus, investigating the effects of a high potassium solution and both beta-adrenergic agonists and antagonists on uterine smooth muscle (myometrium).

In this lab, learners will use a guinea pig ileum preparation to investigate how codeine, naloxone, naltrexone, norepinephrine, and acetylcholine affect gastrointestinal motility.

In this lab, learners use a stimulated rat vas deferens to study drugs that act presynaptically and test the effects of these drugs on synaptic transmission. They also investigate the effects of a range of adrenoceptor agonists and antagonists.

In this lab, learners use an isolated toad rectus abdominis muscle to investigate the effects of tubocurarine and suxamethonium on muscle contraction stimulated by acetylcholine application.

In this lab, learners examine the effects of a variety of drugs on the unstimulated guinea pig ileum preparation. Students also examine the effects of two mystery drugs and determine their mechanism of action.

In this lab, learners use an isolated rat vas deferens to investigate the effects of alpha adrenergic receptor agonists and antagonists, and drugs that affect the amount of norepinephrine in the synaptic cleft.

In this lab, learners perfuse the isolated hindquarters of a rat at a constant flow. From the changes in pressure required to maintain this flow, the vascular resistance is recorded. While many drugs have an effect on blood pressure, this can be due to a primary effect on the heart (changing flow) or on the vascular bed (changing resistance). To clearly define the site of action in the cardiovascular system, it is often necessary to use a simplified preparation such as the rat hindquarters.

In this lab learners will use arterial rings from a pig coronary artery to explore some drug effects. Arterial rings can be used to demonstrate classical responses to autonomic drugs on vascular smooth muscle. Arterial rings can also be used to show the recently-discovered role of the endothelium in modulating vascular responses.