1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ilia_Sergeevich [38]
2 years ago
10

Which is the correct path of an electrical excitation from the pacemaker to a cardiomyocyte in the left ventricle (LV)?

Medicine
1 answer:
lys-0071 [83]2 years ago
5 0

Answer:

The question is lacking the options, below is the completely stated question and options:

This is the correct path of an electrical excitation from the pacemaker to a cardiocyte in the left ventricle (LV).

A. sinoatrial (SA) node → atrioventricular (AV) node → atrioventricular (AV) bundle → Purkinje fibers → cardiocyte in LV

B. atrioventricular (AV) node → sinoatrial (SA) node → atrioventricular (AV) bundle → Purkinje fibers → cardiocyte in LV

C. sinoatrial (SA) node → atrioventricular (AV) bundle → atrioventricular (AV) node → Purkinje fibers → cardiocyte in LV

D. atrioventricular (AV) node → Purkinje fibers → atrioventricular (AV) bundle → sinoatrial (SA) node → cardiocyte in LV

E. sinoatrial (SA) node → atrioventricular (AV) node → Purkinje fibers → atrioventricular (AV) bundle → cardiocyte in LV

Answer:

The correct answer is:

sinoatrial (SA) node → atrioventricular (AV) node → atrioventricular (AV) bundle → Purkinje fibers → cardiocyte in LV  (A.)

Explanation:

The electrical impulse conduction system of the heart refers to the pathways through which electrical signals pass, to cause excitation of specific paths of the heart, leading to depolarization, which in turn leads to contraction and relaxation of the heart. The correct excitation pathway is as follows:

1. Normal excitation originates in the sinoatrial (SA) node, from which depolarization spreads throughout the atria, causing impulses (excitation) to spread from the SA node to the atria. It is believed that this depolarization spreads to the atrial cells through adjacent myocardial cells and myofibrils.

2. Next, the depolarization from the atria reaches the atrioventricular (AV) node, causing excitation of the AV node. The AV node is located on the floor of the right ventricle, close to the interventricular septum. The excitation leaves this site by two pathways; the fast and slow pathways which vary based on the time of transmission of impulses to the next phase.

3. Next, from the AV node, the excitation is passed to the two branches of the bundle of His, which form a network of fibers known as purkinje fibers, from where excitation passes to the apical region of the left and right ventricles causing depolarization of the ventricular myocardium.

Attached to this answer is a picture to show what the pathway looks like.

You might be interested in
What is the Hippocratic oath and what is the key concept that still applies today
Rudik [331]
Hippocratic Oath: One of the oldest binding documents in history, the Oath written by Hippocrates is still held sacred by physicians: to treat the ill to the best of one's ability, to preserve a patient's privacy, to teach the secrets of medicine to the next generation, and so on.
6 0
2 years ago
Tracy sits for 6.5 hours at school, and she sits for 2 hours a night doing homework. According to the physical activity pyramid,
ValentinkaMS [17]
She should try being active by walking around doing chores around her room or something as simple as taking out the trash. body movement is very good no matter how little you’re doing it unless it’s for like 1 second lol
6 0
2 years ago
1. CAA act that regulates drinking water 2. NPDES 4 agency that regulates pollution in general 3. SDWA act that regulates air po
lutik1710 [3]

Answer:

they said it because it helps people stay hydrated

Explanation:

hydration is important

5 0
3 years ago
Blood flow to a tissue will decrease if the:
34kurt

Answer: D) precapillary sphincters relax.

Explanation:

 Blood flow to a tissue will decrease if precapillary sphincters relax as, capillaries provides glucose and oxygen to the cells and allows blood to flow through it when the muscle ring known as the precapillary Sphincters get relaxed. The blood flow is stopped when the precapillary sphincters constrict flow of blood. As, certain chemical signals causes feeder arterioles to dilate and bring more blood into local areas then, it causes precapillary sphincters to relax.

4 0
3 years ago
Courses physology __<br> precentation complament​
koban [17]

oop-...

Um, why they want me to write more then 20 words ?

4 0
3 years ago
Other questions:
  • What is a common belief in most traditional cultures regarding the cause of sickness and death? A. invasion of the body by micro
    11·2 answers
  • Another name for the eye ball is <br> A) lens <br> B) globe<br> C) cornea <br> D) retina
    10·2 answers
  • What are some of the factors that can cause a person to have a single-gene disease or disorder?
    5·2 answers
  • Even though only one sperm will fertilize an egg, why does it take more than one sperm being released from a man for this to occ
    8·1 answer
  • describe the location and main function of the thalamus, hypothalamus, and limbic system of the brain
    8·1 answer
  • Which of the following is a potential reason why antibacterial drug resistance may occur
    14·1 answer
  • The hemoglobin changes shape due to being De- __________.​
    9·2 answers
  • Freud believed that women formed weaker superegos, leaving them more vulnerable to psychological disorders.
    13·2 answers
  • What are the symptoms and signs of pancreatic cancer?
    6·1 answer
  • A client is admitted to the hospital with a diagnosis of Cushing syndrome. What signs and symptoms will the client most likely e
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!