Which of the Following Statements Are True of the Nervous

question 115

Multiple Choice

Which of the following statements are true of the nervous regulation of heart rate? (Read carefully and select all of the correct statements.)

• A)The cardiac centers are in the medulla of the brain.
• B)Only the sympathetic nervous system has nerves to the heart muscle.
• C)Heart rate changes in response to changes in blood pressure or blood gas levels.
• D)Sympathetic nerve fibers to the heart are part of the vagus nerves.
• E)The neurotransmitter norepinephrine decreases heart ratE.
• F)The heart generates its own beat,but the neurotransmitter acetylcholine can increase the rate.

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Definitions:

PLC Program

A sequence of instructions written for a Programmable Logic Controller (PLC) to automate machinery or processes.

Structured Text

A high-level programming language designed for industrial automation. It resembles the syntax of Pascal and is one of the five languages for programming PLCs.

Functional Block Diagram

A graphical representation that illustrates the functions and flow of data among different blocks of a system, highlighting the system's functional interactions.

Ladder Diagram

An industry standard for representing relay logic control systems. The diagram resembles a ladder because the vertical supports of the ladder appear as power feed and return buses and the horizontal rungs of the ladder appear as series and/or parallel circuits connected across the power lines.