Which of the following have thin walls, large lumens, an absence of smooth muscle, and are incapable of vasomotion?
A. Postcapillary venules
B. Medium veins
C. Venules
D. Sinusoids
E. Venous sinuses
E. Venous sinuses
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How have selective pressures altered the expression of the LDH-B gene among populations of killifish living along the eastern coast of North America?
What will be an ideal response?
Which of the following is least involved in pulmonary circulation?
A) right ventricle B) superior vena cava C) pulmonary arteries and veins D) left atrium
The trigger zone of a neuron
a. is located at the axon hillock b. is located in the axon terminal c. contains only chemically gated channels d. conducts graded potentials to the axon e. causes action potentials to move toward the cell body and dendrites
Which of the following is not a function of the nervous system?
A) sense the internal and external environments B) integrate sensory information C) coordinate voluntary and involuntary activities D) direct long-term functions, such as growth E) control peripheral effectors