Which of the following will best increase the conduction rate of action potentials?
A) Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
B) Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
C) Increase the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
D) Decrease the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
B) Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
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Which of the following best describes hydroxyapatite?
A. A secretion of the osteoclasts B. Dissolved minerals in the tissue fluid C. Dissolved minerals in the blood plasma D. Fibrous protein in the bone matrix E. Calcium phosphate in the bone matrix
The blood vessel that branches from the subclavian artery to supply the anterior wall of the chest is the
A) internal thoracic. B) azygos artery. C) mediastinal artery. D) thoracic aorta. E) vertebral artery.
Define motor unit
A) A motor unit is the sum total of all the motor neurons going to a specific muscle. B) A motor unit is the sum total of all the muscle fibers in a whole muscle. C) A motor unit is the maximum tension that a whole muscle can generate with maximum stimulation. D) A motor unit is a motor neuron and all the muscle fibers that it controls. E) A motor unit is the sensory neuron going away from and the motor neuron going to a skeletal muscle.
Unlike information from the eyes, information from the ears bypasses the thalamus on its way to the cerebral cortex
Indicate whether the statement is true or false.