Thermoregulation, Glucose Metabolism, and Frog Reflexes Lab 1 st Quiz 12 Sept 2008 Circle the letter of all correct responses for each question!

Do you have 11 th edition text? Where did you get it? Answer in upper right corner.

# 1 During the absorptive state, what is the fate of glucose in muscle tissue? a) converted to glycogen b) converted to triglycerides c) converted to amino acids d) metabolized to generate ATP

# 2 During the post-absorptive state, what is the fate of glucose in liver cells? a) taken in by facilitated transport membrane proteins b) converted to fatty acids c) converted to glycogen d) released into the plasma

#3 Insulin promotes (stimulates) a) lipolysis b) the formation of triglycerides c) glycogenolysis d) glucose uptake by hepatocytes e) amino acid uptake by muscle cells.

#4 Which of the following are integrators in the feedback loop for glucose homeostasis? a) Alpha cells in Islets of Langerhans b) Beta cells in Islets of Langerhans c) epinephrine d) insulin e) glucagon f) sympathetic nerves

#5 Which of the following can stimulate glucagon secretion? a) decreased plasma glucose concentration b) increased plasma amino acid concentration c) gastrin d) epinephrine and sympathetic activity.

#6 In a person with reactive hypoglycemia during the second hour after drinking the Oral Glucose Tolerance Test beverage containing 10 g of glucose, what has happened to the glucose that was just consumed? a) most of it has entered the sinks b) some of it has been converted to a-ketoacids c) most of it has been converted to ketones d) most of it has been taken up by cells in the Islets of Langerhans in the pancreas.

#7 Which of the following is an effector in the negative feedback loop for thermoregulation? a) cutaneous arterioles b) hypothalamus c) cerebral cortex d) epinephrine e) sweat glands

#8 Which of the following can stimulate the secretion of insulin from certain pancreatic cells? a) GIP b) amino acids in the plasma c) epinephrine in the plasma d) thinking about an impending meal.

#9 Which of the following responses can be produced even when the brain of a frog is completely pithed? a) righting response b) corneal reflex c) wiping reflex d) orientation of the head with respect to gravity and visual cues.

#10 Give an example of feedforward and state the benefit of feedforward in your example.

#11 In the space remaining on the bottom of the answer sheet, diagram a negative feedback response that begins with an icy wind blowing across the legs of this person. This is a timed response. Stop writing when the signal is given.