BIOC34H3 Chapter Notes -Nicotine, Adrenal Gland, Catecholamine
Document Summary
Hand-in all of the pages associated with the lab. Note that there are 9 activities to be completed. You do not need to hand in the histology review supplement. (5 marks) Activity 2: investigating the refractory period of cardiac muscle. An extra systole can be triggered in the early/falling phase of ventricular diastole. (0. 25) Attempt to tetanise the heart by clicking multiple stimulus. Electrical shocks will be delivered to the muscle at a rate of 20 stimuli/sec. Activity 3: examining the effect of vagus nerve stimulation. Vagal stimulation slows the heart rate; possibly to zero. (0. 25) Vagal escape is seen when the heart resumes beating. (0. 25) Heart rate increases and decreases as temperature increases and decreases (i. e. , a q10 effect). Pilocarpine caused a decrease in heart rate (pilocarpine is a muscarinic acetylcholine receptor agonist (i. e. , it does the same as ach). (0. 75) Atropine is a drug that blocks the effects of the neurotransmitter acetylcholine, liberated by the parasympathetic nervous system.
