How are electrical impulses from the ear sent to the brain? mechanical vibrations from the tympanic membrane directly send electrical impulses to the brain. vibrations disturb the fluid within the cochlea that directly sends electrical impulses to the brain. vibrations disturb hair cells within the organ of corti that directly send electrical impulses to the brain. mechanical vibrations from the ossicles directly send electrical impulses to the brain.

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

b is dominant over the allele for the white fur.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.