Human Body Systems

Cardiac Muscles MCQs with Answers

Welcome to the Cardiac Muscles MCQs with Answers. In this post, we have shared Cardiac Muscles Online Test for different competitive exams. Find practice Cardiac Muscles Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Cardiac Muscles.

Cardiac muscles, also known as myocardium, are specialized muscles found exclusively in the heart. These muscles are responsible for the continuous pumping of blood throughout the body, ensuring oxygen and nutrients reach all tissues. Unlike skeletal muscles, cardiac muscles are involuntary and contract rhythmically without conscious control.

Maintaining healthy cardiac muscles is crucial for overall cardiovascular function and heart health. Regular aerobic exercise, such as jogging or swimming, supports cardiac muscle strength and efficiency. A balanced diet low in saturated fats and rich in nutrients like omega-3 fatty acids, antioxidants (such as vitamins C and E), and minerals (like potassium and magnesium) supports heart muscle health and reduces the risk of cardiovascular diseases.

Cardiac Muscles Online Quiz

By presenting 3 options to choose from, Cardiac Muscles Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Cardiac Muscles Questions and Answers and click over the correct answer.

  • Test Name: Cardiac Muscles MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

0
Cardiac Muscles MCQs

Cardiac Muscles

Please fill out the form before starting Quiz.

1 / 40

Cardiac muscle contraction is initiated by the release of ____________ from the sarcoplasmic reticulum.

2 / 40

What is the term for the functional syncytium of cardiac muscle cells?

3 / 40

Cardiac muscle cells have a unique feature called ____________ that allows them to contract in a coordinated manner.

4 / 40

Cardiac muscle is highly resistant to fatigue due to its high content of ____________.

5 / 40

Cardiac muscle cells rely primarily on ____________ for aerobic respiration.

6 / 40

Cardiac muscle cells contract in response to an influx of which ion?

7 / 40

What is the term for the rapid depolarization and repolarization of cardiac muscle cells?

8 / 40

What type of muscle tissue makes up the heart?

9 / 40

Which hormone increases heart rate but has little effect on cardiac muscle contraction strength?

10 / 40

What type of muscle tissue is striated and has a branched structure?

11 / 40

Cardiac muscle cells are ____________, allowing them to transmit electrical impulses efficiently.

12 / 40

Cardiac muscle is involuntary, meaning it is ____________.

13 / 40

The contraction of cardiac muscle is terminated by the ____________.

14 / 40

What is the function of T-tubules in cardiac muscle cells?

15 / 40

Cardiac muscle contraction is regulated by the release of which ion from the sarcoplasmic reticulum?

16 / 40

Cardiac muscle cells are connected by specialized junctions called ____________.

17 / 40

What is the term for the ability of cardiac muscle cells to generate electrical impulses spontaneously?

18 / 40

Which hormone decreases heart rate and cardiac muscle contraction strength?

19 / 40

Which neurotransmitter decreases heart rate and cardiac muscle contraction strength?

20 / 40

Which ion plays a crucial role in triggering cardiac muscle contraction?

21 / 40

Cardiac muscle cells have a high density of which organelle to support energy production?

22 / 40

What is the primary function of the sarcoplasmic reticulum in cardiac muscle cells?

23 / 40

Cardiac muscle contractions are coordinated by the ____________, ensuring efficient pumping of blood.

24 / 40

Which hormone increases heart rate and the force of cardiac muscle contraction?

25 / 40

Cardiac muscle cells have a rich network of ____________ to support rapid conduction of electrical signals.

26 / 40

Which ion is primarily responsible for the plateau phase of the action potential in cardiac muscle cells?

27 / 40

Which structure allows cardiac muscle cells to communicate and synchronize their contractions?

28 / 40

Cardiac muscle cells have a ____________ refractory period compared to skeletal muscle cells.

29 / 40

The contraction of cardiac muscle cells is _____________.

30 / 40

What is the term for the specialized network of cardiac muscle fibers that conduct electrical impulses?

31 / 40

Cardiac muscle cells are dependent on which ion for the initiation and propagation of action potentials?

32 / 40

Cardiac muscle contraction is primarily regulated by which division of the autonomic nervous system?

33 / 40

Which part of the heart generates electrical impulses to regulate cardiac muscle contraction?

34 / 40

Which chamber of the heart contains the thickest layer of cardiac muscle?

35 / 40

The contraction of cardiac muscle is regulated by which nervous system division?

36 / 40

What is the term for the relaxation phase of the cardiac cycle?

37 / 40

What is the primary source of energy for cardiac muscle contraction?

38 / 40

What is the function of the intercalated discs in cardiac muscle cells?

39 / 40

Which enzyme is crucial for breaking down ATP to provide energy for cardiac muscle contraction?

40 / 40

Cardiac muscle cells are joined end-to-end by which specialized structures?

0%

Download Certificate of Cardiac Muscles Test

On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks. Add a certificate to your job application or social profile (like LinkedIn) and get more job offers.

Cardiac Muscles Flashcards

What type of muscle tissue makes up the heart?

Cardiac muscle

Cardiac muscle is involuntary, meaning it is ____________.

Not under conscious control

Which ion plays a crucial role in triggering cardiac muscle contraction?

Calcium

Cardiac muscle cells are connected by specialized junctions called ____________.

Intercalated discs

The contraction of cardiac muscle cells is _____________.

Myogenic

Cardiac muscle cells are ____________, allowing them to transmit electrical impulses efficiently.

Branched

What is the primary source of energy for cardiac muscle contraction?

ATP (Adenosine triphosphate)

Which part of the heart generates electrical impulses to regulate cardiac muscle contraction?

SA node (Sinoatrial node)

Cardiac muscle is highly resistant to fatigue due to its high content of ____________.

Mitochondria

Which hormone increases heart rate and the force of cardiac muscle contraction?

Epinephrine (Adrenaline)

What is the term for the relaxation phase of the cardiac cycle?

Diastole

Cardiac muscle cells have a unique feature called ____________ that allows them to contract in a coordinated manner.

Automaticity

Which chamber of the heart contains the thickest layer of cardiac muscle?

Left ventricle

The contraction of cardiac muscle is regulated by which nervous system division?

Autonomic nervous system

Cardiac muscle contractions are coordinated by the ____________, ensuring efficient pumping of blood.

Conduction system

What type of muscle tissue is striated and has a branched structure?

Cardiac muscle

Cardiac muscle cells rely primarily on ____________ for aerobic respiration.

Fatty acids

What is the function of the intercalated discs in cardiac muscle cells?

Allow rapid conduction of electrical impulses

The contraction of cardiac muscle is terminated by the ____________.

Relaxation of calcium ions

Cardiac muscle cells have a high density of which organelle to support energy production?

Mitochondria

Which neurotransmitter decreases heart rate and cardiac muscle contraction strength?

Acetylcholine

Cardiac muscle cells have a ____________ refractory period compared to skeletal muscle cells.

Longer

What is the function of T-tubules in cardiac muscle cells?

Transmit electrical impulses

Cardiac muscle cells contract in response to an influx of which ion?

Calcium

Which structure allows cardiac muscle cells to communicate and synchronize their contractions?

Intercalated discs

Cardiac muscle cells are dependent on which ion for the initiation and propagation of action potentials?

Calcium

Which enzyme is crucial for breaking down ATP to provide energy for cardiac muscle contraction?

ATPase

What is the term for the functional syncytium of cardiac muscle cells?

Myocardium

Cardiac muscle contraction is regulated by the release of which ion from the sarcoplasmic reticulum?

Calcium

What is the primary function of the sarcoplasmic reticulum in cardiac muscle cells?

Store and release calcium ions

Which hormone decreases heart rate and cardiac muscle contraction strength?

Norepinephrine

Cardiac muscle cells are joined end-to-end by which specialized structures?

Intercalated discs

What is the term for the rapid depolarization and repolarization of cardiac muscle cells?

Action potential

Which ion is primarily responsible for the plateau phase of the action potential in cardiac muscle cells?

Calcium

Cardiac muscle contraction is initiated by the release of ____________ from the sarcoplasmic reticulum.

Calcium ions

What is the term for the ability of cardiac muscle cells to generate electrical impulses spontaneously?

Automaticity

Cardiac muscle cells have a rich network of ____________ to support rapid conduction of electrical signals.

T-tubules

Which hormone increases heart rate but has little effect on cardiac muscle contraction strength?

Thyroid hormone

Cardiac muscle contraction is primarily regulated by which division of the autonomic nervous system?

Sympathetic

What is the term for the specialized network of cardiac muscle fibers that conduct electrical impulses?

Conduction system

If you are interested to enhance your knowledge regarding  Physics, Chemistry, and Computer please click on the link of each category, you will be redirected to dedicated website for each category.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button