Can someone help me with this three question I promise I will mark u a brainliest. Pls I need to get it done today. 1.Impaired muscular function in multiple sclerosis occurs due to frequent loss of nerve signals, one reason for loss of nerve impulses maybe:

A. loss of myelination in axons B. death of neurons in brain
C. loss of cell bodies of neurons
D. none of the above

2. Grey matter of the nervous system is composed of:

A. myelinated neurons
B. unmyelinated neurons
C. collection of neuroglia
D. branched nerves

3. Microglia are:

A. wandering white blood cells, function is immune defense.

B. forming myelin sheaths to insulate axons.

C. forming the blood brain barrier.

D. producing CSF

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from