Substances that provoke an immune response are called ________.
A. antibodies
B. interferons
C. antigens
D. immunogens
Ans: C. antigens
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Muscles that move the knee joint are collectively referred to as ________ muscles.
A. leg B. knee C. calf D. thigh E. hip
In the figure of a sagittal section of a fingernail shown below, where is the nail matrix?
a) A b) C c) E d) F e) G
Which of these will increase the heart rate?
A) both sympathetic stimulation and application of epinephrine to the SA node B) only sympathetic stimulation to the SA node C) only the application of epinephrine to the SA node D) both sympathetic stimulation and application of acetylcholine to the SA node E) only the application of acetylcholine to the SA node
The nervous system releases hormones at synapses and the endocrine system releases neurotransmitters into the bloodstream.
Answer the following statement true (T) or false (F)