18 October --Pseudopodial locomotion

Observations

cytoplasmic streaming

hyaline cap on the pseudopodial end

Structurally

ectoplasm and

endoplasm

Functionally

plasma sol and

plasma gel

Cytoplasm as a colloid

matrix and material dispersed in matrix

Tyndall cone--pattern of light passing through the colloid

phase changes   sol to gel or reverse

Physical shape of pseudopods

lobopodium--blunt structure  usually singular, common in regular amoeba

actinopodia--sharp, fine  structures, usually more than one, usually supported by a central axis, common in Heliozoans

filopodia

recticulopodia--network or meshwork of pseudopods

 

foraminifera

Theories of pseudopodial functioning

push theory
pull theory
sol gel transformation