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

Answers

Answer 1

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.

Which Is The Correct Path Of An Electrical Excitation From The Pacemaker To A Cardiomyocyte In The Left
Answer 2

The correct path of an electrical excitation from the pacemaker to a cardiomyocyte is:

sinoatrial (SA) node → atrioventricular (AV) node → atrioventricular (AV) bundle → Subendothelial conducting network → cardiomyocyte in LV.

The heart is a cone-shaped hollow muscular organ that possesses the property of generating its own electrical impulses or excitations.

It is divided into four(4) chambers namely the right ventricle, left ventricle, right atrium and left atrium.

The correct path of an electrical excitation is from:

The pacemaker: This is also called the sinoatrial (SA) node. It generates the electrical excitations.

Atrioventricular (AV) node: The electrical excitation initiated by SA node is then transmitted to AV node. This transmits the signal from atria to ventricles.

Atrioventricular (AV) bundle: These are specialised fibres that originate from the AV node. They are the bundle that divides to form the right and left bundle branches.

Subendothelial conducting network: This is also called the Purkinje fibres which is formed within the ventricular myocardium.

Cardiomyocyte of the left ventricle: The cardiomyocytes are set of cells that generates contractile force in the heart. These are located at the left ventricle.

Therefore, the correct path of an electrical excitation from the pacemaker to a cardiomyocyte is:

sinoatrial (SA) node → atrioventricular (AV) node → atrioventricular (AV) bundle → Subendothelial conducting network → cardiomyocyte in LV.

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Answer:

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Explanation:

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Answer:

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Answer:

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Answer: Frequency

Explanation:

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Which method of collecting a dietary history is the most time-consuming and requires a high degree of motivation to complete

Answers

Questions

Which of the following methods of collecting a dietary history is the most  

time-consuming and requires a high degree of motivation to complete?  

A) food record  

B) food frequency questionnaire

C) direct observation  

D) 24-hour food recall

Answer:

The correct answer is A) Food Record.

Explanation:

The diet history refers to the historical assessment of an individuals food or dietary intake. It may detail the foods eaten over a 24 hour period, a month or a year.

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Cheers!

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Answers

Answer:

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Explanation:

Available: 300mg/2mL

Needed: 150mg

Equation: 300mg/150mg=2

2mL/2mL=1mL

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Answers

Answer:

30 seconds and up to 2 minutes

Explanation:

Most adults should be able to hold their breath for between 30 and 1 minute if they are in relatively excellent physical condition and have healthy lungs. However, this can change depending on things like age, fitness level and general health.

What is Health?

The concept of health is comprehensive and includes a state of mind, body and social relations of an individual. Physical fitness is the state of a person's body and their ability to engage in physical activity without experiencing excessive fatigue or physical restrictions. Regular exercise, proper diet, getting enough sleep and avoiding bad habits like smoking and excessive drinking are all necessary to maintain excellent physical health.

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Explanation:

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Answer:

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Answer:

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Explanation:

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Answers

Answer:

10-20%

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Answer:

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Answers

Answer:Fear

Explanation:

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A potential barrier to employee involvement in a workplace violence prevention program is a lack of communication and engagement from management, which is present in Option A.

What are workplace violence prevention programs?

Employee involvement in workplace violence prevention programs is essential to an effective workplace violence prevention program, as workplace violence prevention programs are an important aspect of ensuring employee safety and well-being in the workplace, and these programs aim to identify and mitigate potential risks of violence in the workplace. However, there may be barriers to employee involvement in these programs, as one potential barrier is a lack of communication and engagement from management.

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The question is incomplete, complete question is below

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Answers

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Answer:

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Explanation:

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Answer:

5 ml of oral suspension contains 100 mg of ibuprofen.

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im sorry i tried my best t figure it out and this is the best i could come up with, hope this helps

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Answer:

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Answer:

The correct answer is - 7 to 10 inches.

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Answers

Answer:

Outer

Explanation:

The eyes and nose are the sense organs present on the  anterior surface of the body

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According to the escience lab manual for lab 1, experiment 3, you need to prepare a 47 mL of a 24% soda/syrup prescription. To do this, you can use the 80% syrup solution and the 10% soda solution that you have in stock. How many mLs of soda solution do you need to create this final solution?

Answers

Answer:

33 mL  

Explanation:

It is important to recognize that the total amount of pure syrup remains constant:

Total syrup in the stock solution = total syrup in dilute solution

Thus, we can use the dilution formula

V₁c₁ = V₂ c₂

Data:

V₁ = ?;          c₁ = 80 %  

V₂ = 47 mL; c₂ = 24 %

Calculations:

1. The volume of stock syrup

[tex]\begin{array}{rcl}V_{1}c_{1} & = & V_{2}c_{2}\\V_{1}\times80 \, \% & = & \text{47 mL}\times 24 \, \%\\80V_{1} & = & \text{1130 mL}\\V_{2}&=& \dfrac{\text{1130 mL}}{80}\\\\&=&\text{14 mL}\\\end{array}\\\text{You need $\textbf{14 mL}$ of stock syrup.}[/tex]

2.  The volume of soda solution

Total volume of dilute solution =  47 mL

The volume of stock syrup        =  14

Volume of soda solution            = 33 mL

You need 33 mL of soda solution.

The most
common cause
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ambiguity
is​

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I believe the answer is congenital adrenal hyperplasia (CAH)

a solution contains 65 mg/ml of sodium pentobarbital. What volume of this drug would be appropriate to administer to a 300 g laboratory rat at dose of 40 mg/kg

Answers

Answer:

0.18 ml would be appropriate

Explanation:

1kg   ↔   1000mg

         x     ↔   300mg

         x = 0.3 kg

therefore;    40 ×  0.3  = 12 mg/kg

65     ↔     1ml

        12      ↔     y    

         y   = 0.18 ml

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Answers

Answer: The options are not complete, they are;

A) Risk for infection

B) Increased healthcare costs

C) Need to be transferred if overnight stay is required

D) Increased disruption of family functioning.

The correct answer to the question is option C

NEED TO BE TRANSFERED IF OVERNIGHT STAY IS REQUIRED.

Explanation: tympanostomy tube placement is a surgical procedure that done by inserting a grommet or a tympanostomy( a tube of less than 2mm in diameter) into the ear drum of a patient/client.the indication or purpose is to maintain an aerated middle ear over a prolonged period of time,this will as well prevent fluid from accumulating in the middle ear.

Incase of complications of tympanostomy tube placement like bleeding or persistent draining of fluid, scarring and weakening of the ear drum or the tube falling out too early, the child might need to be kept in the hospital facility for proper monitoring and this will necessitate the transfer of the child to another hospital facility for good and proper monitoring and management since the tube placement was done in a freestanding out-patient surgery center where there is no provision for admission of patient or overnight stay.

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