A system that consists of a group of 20 proteins whose activities enhance the body's other defense mechanisms is called ________
A) complement B) antigen C) antibodies D) mast cell
Answer: A
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A new hormone is discovered that appears to play a role in bone development. The hormone is hydrophilic and composed of several amino acid chains. How should this hormone be classified? Choose all that apply
A. as a steroid hormone B. as a peptide hormone C. as an amine hormone D. as a pheromone
A reflex pathway is the simplest pathway
because it a. involves only one synapse. b. is evaluated and integrated by the medulla, not the cerebrum. c. involves only two or three neurons. d. does not involve the central nervous system in any way. e. includes all of these
The virus most closely related to HIV infects monkeys
Indicate whether the statement is true or false
The energy difference between the reactant glucose and oxygen molecules and the product water and carbon dioxide is 686 kilocalories, yet the 36 ATP molecules produced are only storing 263 kilocalories in their outermost phosphate bond. The rest of the energy went
What will be an ideal response?