PEx 4-2 (Diabetes) Flashcards
Which of the following statements is false?
a. Insulin is a hormone secreted from the beta cells of the endocrine portion of the pancreas.
b. Insulin promotes the storage of glucose in the form of glycogen.
c. Insulin decreases plasma glucose levels.
d. Insulin is a hormone secreted into the stomach to aid with starch digestion.
d. Insulin is a hormone secreted into the stomach to aid with starch digestion.
Which of the following statements if true?
a. Plasma glucose levels are controlled by the opposing actions of insulin and glucagon.
b. Plasma glucose can be converted into glycogen stores in liver and muscle cells.
c. Glucose is the primary fuel for nerve cell metabolism.
d. All of these statements are true.
d. All of these statements are true.
A diagnosis of type 1 diabetes mellitus implies that
a. only type 1 nerve cells are responding to insulin.
b. the pancreas is not produing sufficient insulin.
c. all cells of the body are unresponsive to insulin.
d. a person’s urine is abnormally deficient in glucose.
b. the pancreas is not producing sufficient insulin.
A diagnosis of type 2 diabetes mellitus implies that
a. only type 2 cells of the body are responding to insulin.
b. the pancreas is not producing sufficient insulin.
c. the cells of the body are unresponsive to circulating insulin.
d. a person’s urine is abnormally deficient in glucose.
c. th ecells of the body are unresponsive to circulating insulin.
Glucagon is a hormone
a. produced by the beta cells of the pancreas.
b. that opposes the action of insulin.
c. that promotes the formation of glycogen.
d. secreted into the stomach to aid with starch digestion.
b. that opposes the action of insulin
To measure the amount of plasma glucose in a patient sample
the glucose concentration of the sample will be measured and the optical density will be extrapolated from
the glucose standard curve.
Why does the color in the tubes vary?
The tubes contain different amounts of glucose.
A male patient has had successive fasting plasma glucose readings of 115, 110, and 122 mg/dl. The healthcare provider will inform him that
he appears to have impairment or borderline impairment of insulin-mediated glucose uptake by his cells.
To obtain an accurate spectrophotometric measurement of the glucose concentration in the sample
heparin is added to prevent blood clots.
In the spectrophotometric assay used in this experiment, the __________ as the glucose concentration in the sample increases.
optical density increases
A female patient has had successive fasting plasma glucose readings of 130, 140, and 128 mg/dl. The healthcare provider will inform her that
she has developed diabetes.
To maintain plasma glucose homeostasis
insulin-mediated transport of glucose into cells acts as negative feedback when plasma glucose levels rise.
A laboratory technician withdraws a blood sample from a vein in your upper arm knowing that
the plasma glucose concentration will be the same in both the arm vein and the index finger.
