Nervous System Physiology

The right hemisphere of the brain is primarily associated with artistic, creative, and holistic thinking, while the left hemisphere is more associated with logical, analytical, and linear processing. This is known as lateralization of brain function.

Alcohol is a diuretic that causes significant dehydration. The brain temporarily shrinks as it loses water, pulling away from the skull and causing the painful hangover headache. The brain doesn't actually swell.

The brain tissue itself contains no pain receptors - it processes pain signals but cannot feel pain. Pain sensation occurs in the meninges (protective membranes), scalp, and other surrounding tissues.

CPP stands for Cerebral Perfusion Pressure, which is the pressure gradient driving cerebral blood flow. It is calculated as Mean Arterial Pressure minus Intracranial Pressure and is crucial in neurocritical care. Option A (Perfection) is nonsensical in medical context. Option C incorrectly uses Palsy (a neurological condition) as a pressure term. Option D incorrectly combines Perfusion with Palsy.

The cerebrum is the largest part of the human brain, making up about 85% of its weight. It's responsible for higher functions like thought, memory, reasoning, and voluntary movement. The cerebellum coordinates movement, while the medulla controls vital functions like breathing and heart rate.

Meningitis is inflammation of the meninges, the protective membranes covering the brain and spinal cord. Therefore, it affects both the spinal cord and brain, making option D correct. The other combinations (heart, lungs, ears) are incorrect.

The hippocampus is the brain region primarily responsible for forming new memories and is particularly affected by THC. THC binds to cannabinoid receptors in the hippocampus, impairing short-term memory formation. The heart may be affected by marijuana (increased heart rate), but this is not the cause of memory loss. The basal ganglia is involved in movement control.

The brain cannot store glucose. Unlike the liver and muscles which store glucose as glycogen, the brain relies entirely on a continuous supply of glucose from the bloodstream. The brain has very limited energy reserves and consumes about 20% of the body's total glucose despite being only 2% of body weight.

The cerebrum is the largest part of the human brain, making up about 85% of its weight. It controls thinking, memory, language, and conscious decision-making. The cerebellum coordinates movement and balance, while the medulla oblongata regulates vital functions like breathing and heart rate.

Encephalitis is inflammation of the brain, typically caused by an infection. The term literally means 'inflammation of the brain' from Greek words. The liver, lungs, and kidneys are not primarily affected by encephalitis.

Encephalitis is inflammation of the brain, typically caused by an infection. The term literally means 'inflammation of the brain' from Greek words. The liver, lungs, and kidneys are not primarily affected by encephalitis.

The brain itself has no pain receptors (nociceptors). While it processes pain signals from the rest of the body, it cannot feel pain itself. This is why brain surgery can be performed on awake patients.

Reading aloud and talking are language-based activities that actively engage multiple brain regions including those responsible for speech, language processing, and auditory feedback. These stimulate neural development and cognitive function.

The brain exhibits contralateral control - the left hemisphere controls the right side of the body, and the right hemisphere controls the left side. This is why damage to one brain hemisphere affects movement on the opposite side.

Laughter is a complex neural activity involving multiple brain regions, not localized to a single area. Research shows that laughter activates areas throughout the brain including the frontal lobe, limbic system, and temporal lobe, working together in a coordinated network. The frontal lobe processes the humorous stimulus, the limbic system generates the emotional response, and various motor regions control the physical act of laughing.