The axial skeleton includes
A. the skull, hyoid bone, thoracic cage, and vertebral column.
B. the radius, ulna, carpals, and phalanges.
C. the femur, tibia, and fibula.
D. the upper and lower limbs and pelvic and pectoral girdles.
Answer: A
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One of the ways an inhibitory neurotransmitter can work is by causing the postsynaptic cell to
A. close chloride gates and prevent chloride exit. B. open sodium gates and allow sodium entry. C. open potassium gates and allow potassium exit. D. open both sodium and calcium gates.
Which of the following is the correct sequence of structures in a reflex arc?
A. Receptor, effector, interneuron, sensory nerve, motor nerve B. Effector, motor nerve, sensory nerve, interneuron, receptor C. Receptor, sensory nerve, interneuron, motor nerve, effector D. Sensory nerve, interneuron, receptor, motor nerve, effector
________ reflexes perform the simplest functions of the autonomic nervous system
A) Somatic B) Cranial C) Spinal D) Visceral E) Consensual
The release of tissue thromboplastin initiates
A) the extrinsic clotting mechanism. B) hemolysis. C) platelet plug formation. D) the intrinsic clotting mechanism.