Functions of the respiratory system include
A) protecting respiratory surfaces from dehydration and temperature changes.
B) producing leukocytes needed to defend against invading pathogens.
C) generating neurotransmitters essential to the neural control of respiration.
D) providing erythrocytes, especially during times of increased oxygen demand.
E) melanin synthesis and utilization to shield alveoli from environmental hazards.
A) protecting respiratory surfaces from dehydration and temperature changes.
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Steroid hormones are lipids, derived from
A. amines. B. cholesterol. C. polypeptides. D. glycerol. E. nucleic acids.
A person in the anatomic position is standing face forward, with palms of hands facing posteriorly.
Answer the following statement true (T) or false (F)
A dye (with small, water-soluble particles) is injected into the renal artery and blood is then pumped artificially. A glomerulus and surrounding structures are then inspected for dye. Which structures and substances will contain dye?
A. Afferent arteriole, glomerular capsule, and urine only B. Afferent arteriole, glomerular capsule, efferent arteriole, urine, and lymph C. Afferent arteriole only D. Afferent arteriole, glomerular capsule, and efferent arteriole only
The release of hormones from the adrenal cortex is stimulated by
A. adrenocorticotropic hormone. B. oxytocin. C. luteinizing hormone. D. antidiuretic hormone. E. thyroid hormone.