The ________ has mesoderm on the outside and endoderm on the inside.
A) chorion
B) allantois
C) yolk sac
D) amnion
E) None of the answers are correct.
C) yolk sac
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The movement between the femur and tibia is a modified hinge joint.
Answer the following statement true (T) or false (F)
Valves in veins
A. make the use of a skeletal muscle pump unnecessary for venous blood flow. B. are found only in the largest veins. C. are formed of the tunica media. D. are the leading cause of high blood pressure. E. cause venous blood flow to go in only one direction.
Which neurotransmitter has a direct effect on opening chloride channels?
A) dopamine B) norepinephrine C) serotonin D) GABA E) endorphins
Long term chronic pain is.
A) the level of stimulation required to stimulate a nerve to cause a sensation of pain. B) the degree of pain tolerated before an individual takes some action. C) pain perceived at a site distant from the source. D) pain that can lead to depression, sleep disturbances and fatigue.