______ are chemical messengers that are produced in one body region but affect a different body region.
A) Enzymes
B) Endocrines
C) Neurotransmitters
D) Nucleic acids
E) Hormones
Ans: E) Hormones
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Gluconeogenesis is the process in which ________
A) glucose is converted into carbon dioxide and water B) glucose is formed from noncarbohydrate molecules C) glycogen is formed D) glycogen is broken down to release glucose
Hyperthyroidism occurs when the thyroid gland secretes decreased amounts of thyroxine.
a. true b. false
What causes RDS (respiratory distress syndrome) in premature babies?
A. Bronchioles are constricted due to excess production of mucus. B. There is insufficient production of surfactant. C. Muscles associated with respiration are not strong enough to expand the thorax. D. The lungs have not yet produced adequate numbers of alveoli for efficient gas exchange. E. Respiratory centers of the brain are not functional until late in the fetal stage.
During exercise, which of the following directly increases respiratory rate?
A) Reduced oxyhemoglobin B) The Bohr effect C) Increased H+ level in the blood D) Anticipation of the needs of exercising muscle E) Reduced blood pH