Parasympathetic nerves govern involuntary actions such as pupil dilation, peristalsis, gland secretions, etc.
They have bilateral symmetry and a rounded shape.
ANSWER:
Brain cells that are neither neurons nor glia, but which are capable of dividing and then differentiating into neurons or glia, are called NEURAL STEM CELLS.
EXPLANATION:
Neural stem cells are undifferentiated cells originating in the central nervous system.
Neural stem cells (NSCs) have the potential to give rise to the radial glial progenitor cells that grow and differentiate into neurons and glial cells.
NSCs have an important role during development producing the enormous diversity of neurons, astrocytes and oligodendrocytes in the developing CNS.
A NEURON (nerve cell) is a specialized cell that conveys electrochemical impulses throughout the body.
provide support for and insulation between them.
GLIAL CELLS are the most abundant cell types in the central nervous system. Types of glial cells include oligodendrocytes, astrocytes, ependymal cells, Schwann cells, microglia, and satellite cells.
Advantages of separated karyogamy and plasmogamy.
Explanation:
In many fungi, the time of nuclear fusion is separated from the time of cytoplasmic fusion . This arrangement benefits by allowing mating and spore formation to occur in different environment.
Karyogamy is the process of fusion of nuclei , this precedes spore formation.
Plasmogamy is the fusion of cytoplasm, this process involves mating.
Mating is succeeded by spore formation. Both the processes are favored by different environmental condition.
