Your hematocrit level is a the percent of whole blood

38. Your hematocrit level is
a) The percent of whole blood that is red blood cells
b) The percent of whole blood that is plasma
c) The percent of your ECF that is plasma
d) The percent of your ECF that is interstitial fluid
e) The percent of your total body fluids that are ECF
39. Choose the correct order of the steps of synaptic transmission at the motor end plate are listed.
1. Acetylcholine binds to postsynaptic receptors.
2. Acetylcholine is released.
3. A graded depolarization is produced.
4. An action potential is produced on the muscle cell membrane.
5. Channels for both sodium and potassium are opened.
6. Voltage-gated calcium channels on the plasma membrane open.
7. An action potential arrives at the axon terminal.

40. Indicate the proper sequence of events during hemostasis:
1. fibrin produced from fibrinogen
2. inhibition of prostacyclin production
3. release of cascade of clotting factors
4. platelet attachment to damaged collagen
5. vascular spasms
41. End Diastolic Volume is 150 ml/beat, End Systolic Volume is 80 ml/beat, and heart rate is 60
beats/min. What is the stroke volume? What is the cardiac output?
42. Which of the following statement about pressure are true?
a) P = R/F (where P = pressure, F = flow rate and R = resistance)
b) Increasing the resistance in a vessel will decrease the pressure.
c) Increasing the flow rate will decrease the pressure
d) If a vessel radius is increased by a factor of 2, pressure in that vessel will decrease by 16
e) Both a and d are true
43. During smooth muscle contraction, Ca ++ enters the cell primarily from the ______ via the process of
__________. The Ca ++ then activates _________, which in turn activates ______ to phosphorylate
myosin so that cross bridge cycling between thick and thin filaments occurs. At the end of the
contraction, Ca
++
is removed from the cell by the process of _______.
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