Answer the following statements true (T) or false (F)
1. Each resting neuron has a slight positive charge on the outside.
2. In the resting neuron, there is an excess of sodium ions on the interior of the cell.
3. When a resting neuron is stimulated, sodium ions rush into the cell, causing the interior to become negatively charged.
4. Saltatory conduction occurs when a nerve impulse jumps over the myelin sheath of an axon.
5. Saltatory conduction tends to be slower then nonsaltatory nerve conduction.
1. TRUE
2. FALSE
3. FALSE
4. TRUE
5. FALSE
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The cardioacceleratory center fibers are part of the
a. cranial peripheral nervous system. b. somatic peripheral nervous system. c. sympathetic nervous system. d. parasympathetic nervous system.
A unipolar neuron with its neurosoma in a ganglion just outside the spinal cord is functionally classified as which of the following?
A. Interneuron B. Synaptic neuron C. Somatic motor neuron D. Visceral motor neuron E. Sensory neuron
If the zygote splits into two separate cells,
A. identical twins result. B. fraternal twins result. C. dizygotic twinning occurs. D. both cells die. E. paternal twins result.
Acid-base buffer systems minimize pH changes by
A) increasing breathing rate. B) converting weak acids to strong acids. C) promoting the excretion of hydrogen ions. D) converting strong acids to weak acids.