A baby developing in the womb has __________ immunity because it receives __________ antibodies from its mother.
a. antibody-mediated; IgM
b. naturally induced active; IgA
c. naturally acquired passive; IgE
d. naturally acquired passive; IgG
Ans: d. naturally acquired passive; IgG
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Osteocytes release histamine and heparin.
Answer the following statement true (T) or false (F)
__________ fluid prevents friction between the heart and the pericardium when the heart beats
Fill in the blank(s) with correct word
Select the incorrect statement about the parasympathetic nervous system
a. It signals cardiac muscle and smooth muscle. b. Its postganglionic fibers release norepinephrine. c. Its preganglionic fibers release ACh. d. Part of it originates in the brain. e. Part of it originates in the sacral region of the spinal cord.
Bone cells called ________ break down bone by secreting hydrochloric acid and enzymes that dissolve the matrix.
A. osteoclasts B. osteoid cells C. osteocytes D. osteoblasts E. osteoprogenitor cells