Your observations of cooling and warming the beating frog heart include which of the following?
A) Heart rate is very sensitive to temperature: it slows with cooling and beats faster with warming.
B) Cooling the heart has no effect on heart rate.
C) Warming the heart has no effect on heart rate.
Answer: A
You might also like to view...
One mole of any element has the same
A) mass. B) weight. C) number of atoms. D) number of electrons. E) All of the answers are correct.
A vitamin obtained that is a coenzyme in amino acid and lipid metabolism is
A) pyridoxine (B6). B) thiamine. C) riboflavin. D) folic acid (folate). E) niacin.
Which of the following is incorrect pertaining to a mesentery?
A) It is sensitive to laceration near its attachment to organs. B) It is a double-layer of peritoneum. C) It transmits nerves and blood vessels to organs from the body wall. D) It constitutes a region of continuity between visceral and parietal peritoneum. E) It contains lymph nodes and vessels.
Erythropoietin appears in the plasma when peripheral tissues, especially the kidneys, are exposed to __________.
a. extremes of temperature b. low oxygen concentrations c. high urine volumes d. excessive amounts of radiation