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
mash [69]
3 years ago
5

Pacemaker cells in the heart possess intrinsic rhythm. a. True b. False

Medicine
1 answer:
Sveta_85 [38]3 years ago
6 0

Answer:

True

Explanation:

Pacemaker cells, unlike other neurons in the body, can depolarized themselves (and therefore can fire action potentials) without the need of an external innervation of the autonomic nervous system.  

Each class of pacemaker cells has its own intrinsic rate.

For example, sinoatrial node rate is 60-100 bpm (the normal heart frequency).  

The atrioventricular node is also part of the electrical conduction system of the heart. When the sinoatrial node fails, atrioventricular node takes the lead (40-60 bpm).

You might be interested in
What would be the expected response to a skin injury if the involved tissue had lost the normal cell characteristic of contact i
s2008m [1.1K]

Answer:D

Explanation: Contact inhibition is a process of arresting cell growth when cells come in contact with each other. As a result, normal cells stop proliferating when they form a monolayer in a culture dish. Contact inhibition is a powerful anticancer mechanism that is lost in cancer cells

4 0
3 years ago
How do carbohydrates affect your insulin and glucose levels?.
qwelly [4]

Answer:When people eat a food containing carbohydrates, the digestive system breaks down the digestible ones into sugar, which enters the blood. As blood sugar levels rise, the pancreas produces insulin, a hormone that prompts cells to absorb blood sugar for energy or storage.

Explanation:

7 0
2 years ago
A patient' visual acuity was tested using a Snellen chart. The results indicated that her vision was 20/50. What does this resul
Kamila [148]

Answer:

It is a vision that is close to normal, if in the optometric revision improves with the use of the pinhole more than three lines, the problem may be of the refractory type; If this is not corrected, it can be concluded that there is a disease.

5 0
3 years ago
What is global cuisine and what does it have to do with cultural globalization?
lawyer [7]
Gradually, came sushi and karate from Japan, and delicatessens from Italy and Germany, and 18 speed bikes from several European countries. Chinese food cooked and served by Chinese Canadians, not all of it authentic Cantonese or Szechuan or whatever, got steadily more popular as I grew up. And pizza. And espresso coffee. And holopchi from Ukraine and pyrogies from Poland. French perfumes. Mexican leather goods. Smorgasbords. All of these were virtually unknown to me when I was in grade 1, but were common by the time I was in university. I could go on and on. Other countries are going through similar experiences, some more slowly that Canada has, some actually a bit faster.

Then there are the subtler things, the ways of thinking and living. Yoga, tai-chi, zen, existentialism, deconstructionism, post-modernism, Marxism, supply side economics and on and on.

This world is a globalized one now, and it has been getting gradually more and more so for a long time. There is no going back. We learn to live together on Starship Earth or we exterminate ourselves.
3 0
3 years ago
Everytime i make I make a question.. but then nobody answers:<br><br> also wut da heck is 13x9
k0ka [10]

Answer:

ahh I will answer your question

6 0
2 years ago
Read 2 more answers
Other questions:
  • 2. The process of informing the patient about the par-
    7·2 answers
  • Which of the following is a good reason for healthcare workers not complying with proper hand hygiene?
    15·2 answers
  • The registered nurse is making assignments for the day. Which client should be
    10·2 answers
  • The physician has ordered Tigan (trimethobenzamide) 50 mg IM. On hand you have a 20 mL vial that contains 100 mg/mL. How many mL
    11·1 answer
  • Which of the following processes is least directly influenced by adrenergic drugs?
    11·1 answer
  • When you assist the dentist in taking a final impression, you must always obtain a bite
    8·1 answer
  • Which types of blood are exist?
    6·2 answers
  • Which office used to see primarily adolescent patients but now sees adults just as frequently
    8·2 answers
  • Wrinkles in bedclothes can cause
    5·2 answers
  • When breathing in, air enters the trachea through the ________. group of answer choices
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!