Which of the following is an example of a positive feedback loop?     Regulation of Calcium levels in the blood   Regulation of water balance   Regulation of blood sugar   Regulation of blood clotting

Which of the following hormones stimulates bone and muscle growth? Prolactin, Vasopressin, Thyroid Hormone, or Oxytocin

Which is the most immediate response to a high level of blood sugar in human? Group of answer choices increase in release of insulin increase in activity of all cell organelles increase blood flow to digestive tract increase in muscle activity

32°C Vein Artery 15°C 8°C 0-5°C Heat This example of a seagulls leg on a cold surface illustrates: O Blood shunting: which shunts heat from warm arteries into nearby cold veins O Acclimation; which will allow the gull to acclimate to lower temperatures where the brain does not register the cold any longer O Countercurrent blood circulation: which allows the temperature of the feet to stay just above freezing, while maintaining a warm core temperature Heterothermy: which keeps the blood at a constant temperature as it travels down the bird's leg

Research the behaviours of a specific ectothermic animal. How do specific behaviours allow for the animal to control its body temperature in cool and hot conditions?  How do specific parts of the animal’s anatomy help with thermoregulation? Use a feedback diagram to show how this animal uses thermoregulation in one of these conditions: ectotherm in cool conditions ectotherm in hot conditions Be sure to use ⊕ and ⊝ symbols in the feedback diagram to add important details.

In a positive-feedback system the hormone A increases the amount of protein X. Which of the following statements is correct? Group of answer choices a decrease in X always causes a decrease in A, which causes an increase in X. a decrease in A always produces an increase in X, which results in an increase in A. an increase in A always produces an increase in X, which results in an increase in A. an increase in X always produces a decrease in A, which results in a decrease in X.

From the list of strategies for dealing with harsh cold environments, choose those that an ectotherm would employ. See image attatched.

Which of the following is an example of negative feedback? Group of answer choices D. A and B are both examples of negative feedback F. All of the above are examples of negative feedback E. B and C are both examples of negative feedback B. A drop in blood pressure triggers an increase in heart rate, which causes blood pressure to go up. C. Increased blood sugar triggers the release of the hormone insulin, which causes body cells to take up glucose and store it. This decreases blood sugar levels. A. Contractions of the uterus during labor are stimulated by the hormone oxytocin, and the release of oxytocin from the pituitary is stimulated by contractions of the uterus.

Which of the following statements is true? O the disease state results from negative feedback mechanisms negative feedback mechanisms works to maintain homeostasis in the individual O negative feedback mechanisms enhance the triggered stimulus O positive feedback mechanisms are almost always harmful to the individual O blood glucose levels are regulated by positive feedback mechanisms

salt balance All of the systems in the body help to maintain a constant internal environment within acceptable ranges. which is urinary The system pumps blood to and from capillaries to cardiovascular exchange gases. digestive The system collects excess tissue fluids and returns it to the lymphatic vessels via the cardiovascular system. охудen The system takes in and digests food to provide nutrients to replenish those used by a body's cells. homeostasis The system removes from blood and nervous brings in carbon dioxide system helps rid the body of metabolic wastes and and pH. The helps regulate blood volume, respiratory The and endocrine systems regulate all other systems lymphatic through hormones and various feedback mechanisms.