Which of the following is a chronotropic agent that decreases heart rate?
A) glucagon B) norepinephrine C) epinephrine D) acetylcholine
Answer: D
You might also like to view...
Which of the following is NOT a function of antibodies?
a. agglutination of foreign cells b. activation of the complement system c. enhancement of phagocytosis d. stimulation of killer cells. e. All of these are functions of antibodies.
We think that the presence of ice caps at the poles is the "normal" condition for Earth, but actually this situation is less common than ice-free polar regions. How does continental movement relate to this?
What will be an ideal response?
Which of the following is not a lymphatic organ? Select one:
a. liver b. tonsils c. spleen d. appendix
The figure illustrates a posterior view of the right knee joint. What does "A" represent?
A. Medial (tibial) collateral ligament (MCL) B. Lateral (fibular) collateral ligament (LCL) C. Lateral meniscus D. Posterior cruciate ligament (PCL) E. Anterior cruciate ligament (ACL)