All categories

3 years ago

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]3 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

Please answer this question and read the directions Ill mark you the brainliest if you do answer it correctly thank you! Don't a

Sav [38]

Answer:

Less than 4-5 sentences?? I'll take the challenge!!! :))

Ya have to wait about 90 days until you can take the vaccine and get immunity from Cov id-19. The macrophages in your body will help ya fightin and be immune to this darn virus!! Your antibody made by the B cells will get ya helpin in the vaccine!! Before ya do the immunity vaccine test though, you'll be taken through a Antigen test to diagnose what ya have. Then ya will get immune by taking the vaccine than later!! :)))

8 0

3 years ago

the nurse is planning interventions for a client with impaired vision. which intervention should the nurse select when assisting

Marizza181 [45]

The nurse is preparing intervention for a client who has vision impairment. She will use the format of a clock face to describe the placement of food on lunch trays.

<h3>What causes vision impaired?</h3>

Cataracts and untreated refractive errors are the main causes of vision loss and blindness. However, loss of vision can afflict individuals of any age. The majority of persons with impaired vision and blind are over the aged of 50. The person's eyesight cannot be corrected to a "normal" level if they have vision impairment. Loss of eyesight, which occurs when the eye cannot see objects as well as it once could, may contribute to vision impairment.

<h3>What are the types of visual impairments?</h3>

Loss of central vision The cells that are in charge of visual acuity & peripheral vision loss are concentrated in the central region of the retina. The visual field is reduced in those with poor peripheral vision, who also tend to have blurry vision & visual abnormalities after head trauma.

To know more about Impaired Vision visit:

brainly.com/question/9990344

#SPJ4

7 0

1 year ago

What is in the future for someone who is a ob gyn

Helga [31]

OB stands for obstetrics or obstetrician, a physician who cares for women and their babies during pregnancy and childbirth. GYN stands for gynecology or gynecologist, a physician who specializes in treating female reproductive conditions. As an OB/GYN, you provide contraceptive options to women, screen for gynecologic cancers, deliver babies, and perform major surgeries, to list a few.

4 0

3 years ago

a client is shceduled for a cholecystectomy and asks the primary nurse about the function of the gallbladder. which explanation

Jlenok [28]

The explanation the nurse should give as the function of the gallbladder is that it:

Stores and concentrates bile.

The correct answer choice is option a.

<h3>How the gallbladder stores bile</h3>

The gallbladder helps in the store the bile during the digestion of food substances by receiving the information or instructions to contract and then bile is concentrated and formed.

So therefore, we can now confirm from above that the storage of bile is done by the gall bladder.

Complete question:

A client is scheduled for a cholecystectomy and asks the primary nurse about the function of the gallbladder. Which explanation would the nurse give?

a) Stores and concentrates bile

b) Releases bile into the pancreatic duct

c) Connects the common bile duct and the pancreas

d) Controls the flow of fat through the sphincter of Oddi