Question

Which of the following is unique to cardiac muscle cells? a. Only cardiac muscle contains a sarcoplasmic reticulum. b. Only cardiac muscle has gap junctions. c. Only cardiac muscle is capable of autorhythmicity d. Only cardiac muscle has a high concentration of mitochondria.

Name: Problem 9, Chapter 19: Anatomy & Physiology
Uploaded: 2020-06-26T05:07:30-08:00
Duration: 59 s
Channel: Joanna Quigley
Description: Which of the following is unique to cardiac muscle cells? a. Only cardiac muscle contains a sarcoplasmic reticulum. b. Only cardiac muscle has gap junctions. c. Only cardiac muscle is capable of autorhythmicity d. Only cardiac muscle has a high concentration of mitochondria.

    Which of the following is unique to cardiac muscle cells?
a. Only cardiac muscle contains a sarcoplasmic reticulum.
b. Only cardiac muscle has gap junctions.
c. Only cardiac muscle is capable of autorhythmicity
d. Only cardiac muscle has a high concentration of mitochondria.

Anatomy & Physiology

J. Gordon Betts,… 1st Edition

Chapter 19, Problem 9

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Solved by Expert Joanna Quigley

06/26/2020

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Which of the following is unique to cardiac muscle cells? a. Only cardiac muscle contains a sarcoplasmic reticulum. b. Only cardiac muscle has gap junctions. c. Only cardiac muscle is capable of autorhythmicity d. Only cardiac muscle has a high concentration of mitochondria.

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Key Concepts

Cardiac Muscle

Cardiac muscle is a specialized type of muscle found exclusively in the heart. Its unique structure includes features such as intercalated discs and a high density of mitochondria, which support continuous, rhythmic contractions essential for life-long function.

Autorhythmicity

Autorhythmicity is the intrinsic ability of certain cardiac muscle cells, particularly those in the pacemaker regions, to spontaneously generate electrical impulses. This capability is crucial for initiating the heartbeat and maintaining a regular heart rhythm independently of neural input.

Intercellular Communication

Intercellular communication in cardiac muscle, primarily through structures such as gap junctions found within intercalated discs, enables rapid transmission of electrical impulses between cells. This synchronization is vital for coordinated contractions of the heart muscle.

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