Which of the Following Is True About Pluto

question 56

Multiple Choice

Which of the following is true about Pluto?

• A) it is a small icy object, even smaller than Earth's Moon
• B) its orbit is very elliptical
• C) it is similar to a number of objects farther out from the Solar System
• D) astronomers recently classified it to dwarf-planet status
• E) all of these

Understand the function and structure of the nervous system.

Identify and define the roles of different types of neurons.

Distinguish between the autonomic and somatic nervous systems.

Describe the process and importance of reflex actions.

---

Definitions:

Sodium Ions

Positively charged particles of sodium, essential for conducting nerve impulses and muscle contraction in the body.

Cell Body

The spherical part of a neuron that contains the nucleus and connects to the dendrites, which bring information to the neuron, and the axon, which sends information to other neurons.

Neuron

A nerve cell that is the basic building block of the nervous system, responsible for transmitting information throughout the body.

Genetic Information

Data about an organism's genes, including variations and mutations, that can influence health, traits, and disease risk.