A person with type A blood can safely donate RBCs to someone of type __________ and can receive RBCs from someone of type __________.
A. O; AB
B. AB; O
C. A; B
D. B; A
E. O; O
B. AB; O
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The potential difference across the membrane of a resting neuron
A. -70 mV B.-80 mV C. 0 D. 20 mV
The only direct connection between the pectoral girdle and the axial skeleton is where the
A) clavicle articulates with the humerus. B) clavicle articulates with the manubrium of the sternum. C) coxal bones articulate with the femur. D) vertebral column articulates with the sacrum. E) clavicle articulates with the xiphoid process.
What provides access for blood vessels entering and leaving the liver?
A) falciform ligament B) greater omentum C) mesentery proper D) lesser omentum E) diaphragm
This chemical produced in the retina is important for the light-dark cycle of circadian rhythms:
a. melatonin b. melanocortin c. melanopsin d. melanin e. none of the above