You are working quietly in the library when a friend sneaks up from behind and scares you, making your heart race. At this time, your ..... nervous system would be dominant.

NERVOUS SYSTEM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

You are working quietly in the library when a friend sneaks up from behind and scares you, making your heart race. At this time, your ____ nervous system would be dominant.

A	parasympathetic
B	sympathetic
C	somatic
D	central

Explanation:

Detailed explanation-1: -The sympathetic nervous system (SNS) has a wide variety of cardiovascular effects, including heart-rate acceleration, increased cardiac contractility, reduced venous capacitance, and peripheral vasoconstriction.

Detailed explanation-2: -In the heart (beta-1, beta-2), sympathetic activation causes an increased heart rate, the force of contraction, and rate of conduction, allowing for increased cardiac output to supply the body with oxygenated blood.

Detailed explanation-3: -The sympathetic nervous system releases norepinephrine (NE) while the parasympathetic nervous system releases acetylcholine (ACh). Sympathetic stimulation increases heart rate and myocardial contractility.

There is 1 question to complete.

NEET PG DENTAL EXAM

EMBRYOLOGY

NERVOUS SYSTEM