During breastfeeding, as the baby suckles, nerve signals are relayed from the mother's nipple to the mother's brain. The brain initiates the mother's pituitary gland to produce more prolactin (a hormone), which causes more milk to be ejected. This process of breastfeeding is an example of
A. positive feedback.
B. feedforward regulation.
C. negative feedback.
D. acclimatization.
E. adaptation.
Answer: A
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A membrane attack complex is a protein grouping that
A. triggers phagocytosis of a target cell by a nearby macrophage or neutrophil. B. forms a channel in the target cell membrane that causes cytolysis. C. links a pathogen to a red blood cell so that it is carried to the liver or spleen. D. stimulates basophils to attack a multicellular parasite in the body.
This subatomic particle does not contribute to the mass of an atom:
a. proton b. neutron c. electron d. all of the above particles contribute to the mass of an atom
All of the following are functions of the skeletal system EXCEPT ________
A) maintaining body temperature B) supporting the body's soft tissue C) manufacturing blood cells D) serving as levers that allow the muscular system to produce movement
Which leukocytes are derived from the myeloid line?
A. Neutrophils B. Neutrophils, basophils, eosinophils, and monocytes C. Lymphocytes D. Lymphocytes and monocytes E. Basophils and eosinophils