Which of the following are pancreatic secretions? (Select all that apply)

A. Cellular metabolism: Cellular metabolism refers to the chemical reactions inside cells that use O₂ and produce CO₂, but it does not describe the movement of gases between blood and cells.
B. Alveolar ventilation: Alveolar ventilation is the movement of air into and out of the alveoli (airways → lungs), not the exchange between blood and body cells.
C. External respiration: External respiration is gas exchange between the alveoli and pulmonary capillaries (air and blood in the lungs), not between blood and tissues.
D. Internal respiration: Internal respiration is the exchange of O₂ from the blood into body cells and CO₂ from the cells into the blood .

A. Stimulation of hair follicles: Hair follicle activity is influenced by androgens (testosterone), but LH does not directly stimulate hair follicles -not LH’s primary role.
B. Regulating gamete production and maturation:FSH primarily stimulates Sertoli cells and spermatogenesis; LH contributes indirectly via testosterone but LH itself mainly stimulates hormone production -part of the broader regulation but not the primary direct role.
C. Stimulating estrogen production: LH does not primarily stimulate estrogen production in males; estrogen in males arises by aromatization of androgens and is not LH’s main target.
D. Stimulating testosterone production: LH acts on Leydig cells in the testes to stimulate testosterone synthesis, which is LH’s primary role in males.