Suppose We Look at Two Distant Galaxies: Galaxy 1 Is

question 69

Multiple Choice

Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In that case ________.

• A) Galaxy 1 must be twice as big as Galaxy 2
• B) we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2
• C) we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2
• D) Galaxy 2 must be twice as old as Galaxy 1

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Definitions:

Cardiac Conduction System

A system of specialized muscle tissues in the heart that initiates and coordinates the contraction of the heart, regulating its rhythm.

Purkinje Fibers

Specialized fibers in the heart that help regulate the heart's rhythm by conducting electrical impulses swiftly.

AV Bundle

The His bundle, a group of specialized cardiac muscle cells designed for conducting electricity, conveys the electrical signals from the AV node to the apex where the fascicular branches begin.

Cardiac Cycle

The sequence of events that occur in the heart during one complete heartbeat, encompassing both diastole and systole phases.