The destruction or inactivation of pathogens, the main activity of the lymphoid system, constitutes the ________ of the body.
Fill in the blank(s) with the appropriate word(s).
immune response
Anatomy & Physiology
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Which fetal circulatory structure shunts blood from the pulmonary trunk to the aorta?
A. Umbilical vein B. Ductus venosus C. Foramen ovale D. Ductus arteriosus E. Umbilical artery
Anatomy & Physiology
Intramembranous ossification begins with differentiation of ________ cells
A) osteoclast B) osteolytic C) mesenchymal D) osteoblast E) osteocyte
Anatomy & Physiology
Which of the following is not secreted by the adrenal cortex?
A. Estrogens B. Androgens C. Aldosterone D. Cortisol E. Epinephrine
Anatomy & Physiology
The layer of the meninges in direct contact with the spinal cord is the
A) dura mater. B) subarachnoid space. C) arachnoid mater. D) pia mater. E) choroid plexus.
Anatomy & Physiology