Thicker sections must be fixed, dehydrated, embedded in plastic, sectioned, and then stained with electron dense heavy metals for TEM.

TLS Online TPP Program

#Id: 5175

#Unit 7. System Physiology – Animal

Most capillary walls are relatively impermeable to the proteins in plasma, and the proteins exert an osmotic force of about 25 mm Hg across the capillary wall (oncotic pressure) that pulls water into the blood.

TLS Online TPP Program

#Id: 5176

#Unit 7. System Physiology – Animal

The plasma proteins are also responsible for 15% of the buffering capacity of the blood because of the weak ionization of their substituent COOH and NH2 groups.

TLS Online TPP Program

#Id: 5177

#Unit 7. System Physiology – Animal

Plasma proteins have:  Specific functions

(antibodies & blood clotting proteins)

Nonspecific functions (carriers for various hormones, solutes, and drugs)

TLS Online TPP Program

#Id: 5178

#Unit 7. System Physiology – Animal

Most of the plasma proteins are synthesized in the liver only circulating antibodies are manufactured by lymphocytes

TLS Online TPP Program

#Id: 5179

#Unit 7. System Physiology – Animal

Serum has essentially the same composition as plasma, except that its fibrinogen and clotting factors II, V, & VIII have been removed.

TLS Online TPP Program

#Id: 5180

#Unit 7. System Physiology – Animal

Serum has a higher serotonin content because of the breakdown of platelets during clotting.