What Is Microlensing

question 153

Multiple Choice

What is microlensing?

• A) minute shift in the apparent position of a star as a massive object passes in front of it
• B) temporary brightening of a star as a massive object passes in front of it
• C) temporary disappearance of a star as a massive object passes in front of it
• D) gradual reduction in brightness of a star as a massive object passes in front of it

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Definitions:

Synaptic Vesicle

A small, spherical sac that contains neurotransmitters, located within the terminal buttons of neurons, and is responsible for releasing neurotransmitters into the synaptic cleft.

Micrometer

A precision instrument used to measure small distances or thicknesses between two points, typically used in engineering and machining.

Depolarizing Currents

Electrical currents that reduce the membrane potential of neurons, making the inside less negative and closer to the threshold for firing an action potential.

Action Potentials

short-lasting events in which the electrical membrane potential of a cell rapidly rises and falls, allowing neurons to transmit signals.