The middle ear and internal ear of mammals are enclosed in which of the following bones

A. Medulla oblongata : controls respiration and cardiovascular reflexes

B. Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement

C. Corpus callosum : band of fibers connecting left and right cerebral hemispheres

D. Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst

A. Proteins and lipids

B. DNA and RNA

C. Free ribosomes and RER

D. Nucleic acids and SER

A. Astrocytes and Schwann cells

B. Oligodendrocytes and Osteoclasts

C. Osteoclasts and Astrocytes

D. Schwann cells and Oligodendrocytes

A. Pre-synaptic membrane

B. Tips of axons

C. Post-synaptic membrane

D. Membrane of synaptic vesicles