Question

5. List two second messenger systems described in lecture. What kind of messenger system does insulin use? Doen vue Cycase + Prospholipose C 6. What kinds of signal molecules use second messenger systems (lipophilic or lipophobic) and why? 7. A response mechanism that results in the AMPLIFICATION of the initial change (ie uterine contractions during childbirth) is called 8. The path from the sensor to the integrating center is called the pathway, while the path from the integrating center to the effector is called the pathway. 9. Cortisol regulates plasma concentration, and this hormone is produced in the or 10. Regarding the reflex pathway for cortisol release, place the following statements in the proper sequence, beginning with the stimulus = circadian rhythms or stress. a. anterior pituitary releases adrenocorticotropic hormone (ACTH) b. hormone travels the hypothalamic-hypophyseal portal system c. cells initiate glycogenolysis and lipolysis d. adrenal cortex releases cortisol e. hypothalamus releases corticotropin releasing hormone (CRH)

Answer 1

5. cAMP and PL-C, insulin uses cAMP

6. Lipophobic because they can not make through the lipid membrane

7. Positive feedback loop

8. Afferent or sensory pathway, efferent or motor pathway

9. Glucose, adrenal cortex

10. E, b, a, d, c