Answer:
They provide energy to the bodies of the elderly and children through particularly glucose
None of the above. Neurotransmitters are chemicals like serotonin, norepinephrine and dopamine inside the brain and thus deal with the specialties of medicine, neurology and psychiatry. Hope that helps!
Answer:
Most practitioners wait until at least 6 weeks to perform a first pregnancy ultrasound. However, a gestational sac can be seen as early as 4 1/2 weeks after your last period, and a fetal heartbeat can be detected at 5 to 6 weeks (though it might not always be).
Anatomical and physiological barriers provide the crucial first line of defense against pathogens. These barriers include intact skin, vigorous mucociliary clearance mechanisms, low stomach pH and bacteriolytic lysozyme in tears, saliva and other secretions.
