Most of the Increase in Planned Spending Over the Next

question 139

Multiple Choice

Most of the increase in planned spending over the next 50 years comes from:

• A) defense.
• B) Social Security.
• C) Medicare and Medicaid.
• D) foreign aid.

Understand the concepts of rotational and gravitational equilibrium and the factors affecting them.

Identify the effects of certain lifestyle choices on sensory organ health, specifically the eyes.

Understand the structure and function of various parts of the ear and their contributions to hearing and balance.

Explain the process of how light and sound are perceived by the brain.

---

Definitions:

Neurotransmitters

Chemical messengers in the nervous system that transmit signals across the synapse from one neuron to another.

Reuptake

The process by which neurotransmitters are absorbed back into the nerve cell that released them, effectively stopping their action in the synapse.

Neurotransmission

The process by which signals or messages are transmitted through the nervous system by neurons, using chemical substances known as neurotransmitters.

Graded Potential

A shift in the electrical charge across a neuron's membrane, varying in magnitude and not following the all-or-nothing principle.