The hormones that drive frog metamorphosis are _____ while those involved in insect metamorphosis are_____. a. T3 and T4; juvenile hormone and ecdysone b. TR alpha and TR beta; adrenaline and ecdysone c. Juvenile hormone and ecdysone; T3 and T4 d. cortisol and corticosterone; juvenile hormone and ecdysone

18.  Studies have shown that oxytocin acts as an "anti-social" hormone in humans, promoting aggression and avoidance. a. True b. False

Understand Main Ideas 1. MAINIDEA Assess the reasons why hormone feedback systems are referred to as "negative feedback." 2. Predict when you would expect to find high levels of insulin in a person's blood and when you would expect to find high levels of glucagon in a per- son's blood.

Which of the following hormones would be expected to be released if you were studying all day for an exam and skipped breakfast and lunch?  Group of answer choices a. Glucagon  b. Insulin c. Aldosterone d. Thyroid hormone

Which statement about this diagram is NOT correct? A. Each pink sphere is an actin protein molecule B. The red balls are troponin C. The green things are myosin D. The blue line is tropmyosin E. Ca++ ions attach to the myosin heads to initiate the powerstroke

Without hormone exposure in utero, the external anatomy of a mammal:     a. will have a male appearance     b. will have a female appearance     c. will have an appearance that is a mix of male and female characteristics     Which of the following statements is most consistent with monoism?     a. The mind is separate and independent of the brain.     b. Every thought is a process of neural events.     c. The brain is required to understand and access the mind, but the two entities are distinct and separate.

How is it that a mutation in the Ptx1 can allow it to stop being active in the pelvic area, but not in the other tissues of stickleback fish? Group of answer choices A- The mutation is in the GENETIC SWITCH that turns ON/OFF the genes that lead to PRESENCE/ABSENCE only of pelvic fins.   B- The mutation is in the GENE that makes the materials that build only the pelvic fins.