s secreted by one cell, it travels a sh x i ubstance.ces an effect in a cell imm

Question

s secreted by one cell, it travels a sh x i ubstance.ces an effect in a cell immediately ad and prowing terms might fit this substance except ort Prostaglandin. B. Neurotransmitter C Pheromone o Growth factor E. Nitric acid The secretion of of hormone A causes an increa Smechanism works by positive feedback, which of 15. ctivity Xin A. An increase in X produces an increase in A. B. An increase in X produces a decrease in A C. A increase in A produces an increase in x D. A decrease in A produces an increase in X E. Both A and C are correct. 16. Concerning half-life of hormones ones with shorter half-lfe are maintained at mare coroatne ins the blood. B. Hormones with shorter half-life regulate activities with a stou duration C. Lipid soluble hormones generally have a longer half-ife D. Lipid soluble hormones are degraded rapidly by enzymes E. Water soluble hormones usually combine with plasma proteins 17. When corpus luteum degenerates, A. FSH and LH secretion start to rise as the inhibitory effetsdeted steroids are withdrawn. 8. Circulating levels of estrogen and progesterone rapidly decine C. The endometrium sloughs off D. Both A and B occur E. All of the above. 18. In oogenesis, meiosis I occurs A. In early fetal life. B. At birth C. Just before ovulation. D. After ovulation but before fertilization E. After fertilization.

Explanation / Answer

14. C) Pheromones

Pheromones are hormone like substances. These will be secreted Our of the body from the individual, and not out of only cells. Pheromones impact the behavior of another individual. These may be in th form of food trails or se-x pheromones, or food trails or even alarm pheromones.

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