Show:
Lungs/Heart
Lungs/Heart 2
Lungs/Heart 3
100
Do crickets have lungs?
No! Why not?
100
True or false: when using a sphygmomanometer to take blood pressure, diastolic pressure occurs at the point when the sounds of Korotkoff can be heard.
False...that is systolic pressure. Diastolic pressure occurs when the sounds of Korotkoff can no longer be heard.
100
True or false: There is always a higher partial pressure of carbon dioxide in the blood than there is a partial pressure of oxygen.
False.
200
Put these vessels in order from largest diameter to smallest: arteriole, capillary, aorta, artery.
Aorta > artery > arteriole > capillary
200
The blood pressure we take using a sphygmomanometer is indicative of the blood pressure created during which part of the cardiac cycle? (NOTE: There will be 2, because there are 2 pressures that we take)
Ventricular diastole (diastolic pressure) and ventricular systole (systolic pressure).
200
True or false: more oxygen moves into a fish's circulatory system per "breath" than it does into our circulatory system.
True!
300
Place the following events in the order they occur during a heartbeat. A) bottom of ventricles contract B) atria contract C) SA node generates electric impulse D) AV node carries/transmits electric impulse E) top of ventricles contract
C, B, D, A, E
300
What makes the first heart sound? What makes the second?
The first heart sound is the shutting of the AV valves (and subsequently, the blood in the ventricles hitting those valves), and the second heart sound is the shutting of the semilunar valves (and subsequently, the blood in the aorta and pulmonary artery hitting those closed valves).
300
True or False: The tunica externa is NOT made of smooth muscle.
True. What is the tunica externa made of?
400
How many chambers does an amphibian heart have?
3: 2 atria, 1 ventricle. There will be a question JUST like this on the exam! Make sure you know all of the examples Dr. Waters gave.
400
How do you think the heart would compensate for the lack of an SA node? Like if something happened to the SA node and it no longer worked, how would the heart resume its work?
If ever the SA node fails, the AV node takes over, as it is the secondary pacemaker of the heart. The AV node is capable of generating APs to set the heart rate to 40-60 beats per minute, which is enough to retain consciousness.
400
The capillary beds are the primary sites of ______________.
Gas exchange
500
Why do fish hearts only have 2 chambers?
Because the heart only deals with unoxygenated blood, it doesn't need to compartmentalize oxygenated/unoxygenated blood!
500
Put these in order of when action potentials reach them: Purkinje fibers, SA node, bundle branches, AV node
SA node, then AV node, then bundle branches, then Purkinje fibers
500
Identify the thickest structure below. A) tunica intima of vein B) tunica media of artery C) tunica media of vein D) tunica intima of artery E) endothelium of capillary
B