Structure and Function of Organisms
Lab 5: Crayfish physiology
1. What gas is taken up during ventilation? ____________________
2. What gas is released during ventilation? ____________________
3. What molecule is broken down to generate energy? ____________
4. During ventilation, gases enter and exit the circulatory system by the process of ______________.
5. The amount of water pumped by a crayfish past its gills is proportional to what? __________________________
6. Why is nitrogen gas bubbled through the water in this laboratory exerise ?
7. In what direction do crayfish pump water? ____________________
8. In the crayfish physiology lab, you will be taking oxygen concentration data readings every ____________ minutes.
9. Blood pressure is defined as _______________________________
10. Vessels that carry blood away from the heard are called __________
11. Blood pressure is highest at the time of ______________________
12. The highest blood pressure reading is called the ________________
13. During ventricular relaxation, you will measure the ______________ pressure.
14. A ____________________ consists of an inflatable armband, rubber bulb, and a pressure gauge.
15. The arm-band is initially inflated to a pressure that stops _____________________.
16. When you can first hear a pulse in the stethoscope, the gauge will measure the ______________ pressure.
17. In what units is blood pressure measured? ____________________
18. The ___________________________ is characterized by a reduction in the pulse rate and the blood flow when someone places his/her face in water.
19. ______________________ are tiny vessels that connect the arteries to the veins.
20. Vessels that carry blood towards the heart are called ____________.