In the 2000 film 'Memento' the lead character, Leonard is unable to form new memories as a result of an earlier head injury caused by an assailant. This is known as:

Correct Answer: C

Rationale: Anterograde memory dysfunction is characterized by the inability to form new memories after a traumatic event or injury, as depicted in the film 'Memento.' This condition is often linked to damage in the hippocampus or surrounding medial temporal lobe structures, which are essential for encoding and storing new information. Individuals with this dysfunction can recall past memories but struggle to create new ones, leading to significant challenges in daily functioning.

Correct Answer: B

Rationale: Neurons are the basic building blocks of the nervous system and consist of three main parts: dendrites, axons, and the cell body. Dendrites receive signals from other neurons, the cell body contains the nucleus and organelles, and the axon transmits signals to other neurons or target cells. These components work together to facilitate communication within the nervous system, enabling sensory perception, motor control, and cognitive functions.

Correct Answer: A

Rationale: The action potential pattern observed on an oscilloscope is caused by rapid changes in membrane polarity. During an action potential, the membrane potential depolarizes (becomes more positive) as sodium ions rush into the neuron, followed by repolarization (returning to negative) as potassium ions exit. These polarity changes are essential for the propagation of nerve impulses and are a hallmark of neural activity.

Correct Answer: D

Rationale: The nervous system performs three primary functions: receiving sensory input, integrating and processing this input, and triggering motor responses. Sensory input involves detecting stimuli from the environment or within the body. Integration occurs in the brain and spinal cord, where information is processed. Motor output involves sending signals to muscles or glands to produce a response. Therefore, the nervous system's job encompasses all these functions, making 'All of the above' the correct answer.

Correct Answer: A

Rationale: Each cerebral hemisphere is divided into four lobes: the frontal, parietal, temporal, and occipital lobes. Three of these lobes (frontal, parietal, and temporal) share their names with the bones of the skull that overlie them. The occipital lobe is named after the occipital bone. Therefore, four, three is the correct answer as it accurately describes the division and naming of the cerebral lobes.