Download Circulatory System

Katie Antony
Biology 3050
Page 1
Help Session Week 4
1. True or False: All veins carry deoxygenated blood. Explain.
2. If I am a RBC in the vena cava, describe my path through the circulatory system, ending back
at the vena cava. (Be as specific as you can. Mention all valves, and mention things like
arterioles.)
3. Label this (I’m sorry some of the lines are messy.)
4. Most of the blood flow from the atria to the ventricles occurs before
after the atria
depolarizes?
5. What is the purpose of the heart valves? What causes them to close?
6. Name 2 differences between electrical and chemical synapses.
7. Draw a ventricular cardiac muscle cell action potential. Label the major ion conductances at
each part:
Katie Antony
Biology 3050
Page 2
Help Session Week 4
8. Label the parts of the conducting system of the heart
9. Draw the action potential of an SA node cell. Describe the channel conductances of each part.
10. Review: Neuron A inhibits neuron B, neuron C, and neuron E. neuron B inhibits neuron F.
Neuron C inhibits neuron D, neuron D excites neuron F. Neuron E inhibits neuron D. What
will happen to the firing frequency of neuron F as a result of an increase in the firing frequency
of neuron A?
11. Mnemonics: Blood flows from A to V (which is in alphabetical order)
a. Starting in the heart blood flows from Atria to Ventricles
b. Leaving the heart blood flows from Arteries to Veins.
12. Mnemonics: alpha-adrenergic receptors constrict arteries: you can imagine the
around an arteriole and squeezing it shut because it looks a little like a rope.
α wrapping