Compared with the outside of the neuron, the inside has a(n)
The Correct Answer is {"dropdown-group-1":"B"}
A. positive: The outside of the neuron is more positive due to a higher concentration of sodium ions (Na+).
B. negative: During the resting membrane potential, the inside of the neuron is negatively charged (typically -70mV) relative to the outside, largely due to internal proteins and the leakage of potassium.
C. equal: If the charge were equal, there would be no membrane potential, and the neuron could not fire an impulse.
D. None of the above: Incorrect, as choice B is the standard physiological fact.
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Correct Answer is C
Explanation
A. Muscle: Muscle tissue (especially cardiac and skeletal) has a very limited capacity to regenerate and often heals via scarring (fibrosis).
B. Nervous: Nervous tissue has the least regenerative capacity, particularly in the Central Nervous System.
C. Epithelial: Epithelial tissues (like skin and the lining of the gut) constantly undergo cell division and have a high capacity for repair and regeneration.
D. All of the above: Incorrect, as the capacity varies wildly between these tissue types.
Correct Answer is A
Explanation
A. Thalamus: The thalamus acts as a relay station where we first become aware of a sensation in a "crude" or unrefined way before it is processed for detail elsewhere.
B. Cerebellum: The cerebellum processes proprioception and coordination but does not produce conscious sensory awareness.
C. Brainstem: The brainstem handles vital reflexes and signal conduction but is not the center for conscious sensory awareness.
D. Cerebral cortex: The cortex provides "fine" or precise sensory discrimination (exactly where and what a sensation is), which is the opposite of "crude" awareness.
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