Explanation:
A round shape, No chlorophyll, A nucleus, Smaller vacuole.
I believe
this is a true statement
Answer:
A,C,F,E,D,B
Explanation:
The is the sequence of action potential transmission at at the neuromuscular junction. Generally the arrival of action potential from the presynptic neuron caused influx of ca+ which causes migration and the release of the the acetycholine to the synaptic cleft.
The acetycholine binds with the receptors on the saccolemma to causes opening of Na+ , its influx to causes depolarizarion of the sacolemma. The depolarization of the latter spreads along the transverse tubules, This depolarization causes increases in the permeability of the sacorplasmic reticulum, with opening of ca+ channels and diffusion of Ca+ out of the S. reticulum.
The Ca+ binds to troponin,and tropomyosin exposed the myosin-binding sites on actin filament . The myosin head forms the cross bridges with the filament, and therefore the sacomere shortens leading causing muscle contraction.
The pores on the outer layer of the sponge which takes is water are called POROCYTES.
Sponges are groups of very simple animals which usually grow at a spot, that is, they lack the ability to move from one place to another. There are about 10,000 species of sponges; most sponges live in salt water while some live in fresh water. The body surface of sponges are made up of holes through which water enter into their cells.
