Which of the following is the body’s first and most important line of defense against microorganisms? A. Antibodies
B. Skin
C. Humeral
D. White blood cells

Which biofeedback measurement is correct? ekg assesses electrical activity conducted by our muscles an emg is a test that assesses electrical activity conducted by the heart an eeg is a test that assesses electrical activity conducted by the adrenal glands a gsr is a test that assesses electrical activity conducted by the skin