A frog aka Anuran is an Remember this is a all or none multi

A frog (aka, Anuran) is an: Remember this is a all or none multiple answer Question In these types of questions you must check all of the true responses. Invertebrate Vertebrate Amniote Anaminote Tetrapod Polyspermy is death to the organism therefore several events in the fertilization process attempt to block polyspermy from happening Within t-3 seconds the testing membrane potential has elevated to -90, the potassium electrochemical potential -80, the chloride electrochemical potential -50-55, the combined sodium-potassium electrochemical potential -30, the sodium electrochemical potential In the slow block to polyspermy Ca^++ release is proceeded by Protein Kinase C Activation Protein Kinase C and D Activation Protein Kinase A, C & D Activation Increase in intracellular pH. Activation of protein synthesis

Solution

Frog ia an amniote tetrapode and also vertebrate. vertebrate is an animal with internal skeleton. tetrapode means 4 limbs and amiote means the egg is surrounded by amnion layer.

when the two plasma membranes contact each other i.e of egg and sperm. the resting memrane potential elevates and forms depolariztion reaching +30 Na+ electro-chemical potential. this fusion of membranes causes release of IP3 which inturn causes ca+2 ions release into egg cytoplasm. waiting in cytoplam are cortical vesicles which fuses and the folling changes occur:

All this whole process prevents polyspermy.