What structure within a capillary bed controls shunting of blood from the arteriole to the venule?
A. precapillary sphincter
B. precapillary valve
C. pericardium
D. shunt valve
E. endothelium
Answer: A
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Indicate whether the statement is true or false.
Assuming geological evidence is accurate, life on Earth may have originated
a. 14 billion years ago. b. 4.6 billion years ago. c. 3.5 billion years ago. d. 2.1 billion years ago. e. 1.2 billion years ago.
The letter “D” in the above figure represents
a. a kidney. b. a urethra. c. a urinary bladder. d. a ureter. e. water.
Which of the following is the very next event that occurs when a chlorophyll molecule absorbs light?
A. the energy is released as heat B. florescence occurs C. the electron is boosted/ ejected as an excited state D. Resonance energy transfer occurs E. the electron is transferred to an electron transport chain