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
snow_lady [41]
3 years ago
12

During an anatomical class, Dr. Hales removes the heart of a frog and places it in a beaker of oxygenated Ringer's solution. He

then instructs his health care trainees to observe how the muscles of the frog's heart continue to contract even without external stimulation. What property of the muscles of the heart is Dr. Hales asking his students to observe?
Autorhythmicity
Bradycardia
Tachycardia
Biorhythmicity
Biology
2 answers:
Furkat [3]3 years ago
5 0

Answer:

Autorhythmicity of the heart

Explanation:

It is the study of the characteristics features of the cardiac muscle cells with the ability to initiate action potential at certain level without connection to any external stimulus which the heart beats constantly and rhythmically. Cardiac muscle cells controls the rate of contraction of heartbeats.

saveliy_v [14]3 years ago
5 0

Answer:

Autorhythmicity

Explanation:

This is a unique future of  cardiac muscles of the heart.It is the ability of  these  muscles to generate and fire action potential spikes  at a fixed  rate without an external stimulus ;  the spread of these potential  to all the cells of the heart, with consequent  contraction heart  as a single unit , or rhythmically.

This process is mediated by nervous and endocrine  system, and  the action potential generated is conducted through the heart by the myocardial conduction cells.

Autorhythmicity is the due to lack of membrane potential in the myocardial conduction cells. This is because, the  sodium channels did not close up but  allow continuous influx of sodium ions, with the rise in the membrane potential from  -60mv to 40mv. Consequently,pre-potential depolarization sets in. This is followed by influx of Ca+ ions, though the voltage-gated Calcium channels; leading to generation of action potential and therefore spread to all parts of the heart,leading to autorhythmicity.

You might be interested in
How dose observed pattern of magnetic reversals supports the theory of sea floor spreading
expeople1 [14]

Answer:

im bord

sorry

3 0
2 years ago
Read 2 more answers
What do plants and other producers do?<br> How do producers and consumers use it?
Scrat [10]

Answer:

Plants and other producers generate their own energy, which allows them to grow, reproduce, and live. They are the only living organisms on the planet that can produce their own supply of food energy, which makes them unique. They, of course, require sunlight, water, and air to survive.

<u>OAmalOHopeO</u>

8 0
3 years ago
Me ajudem a resolver essas questoes
dimaraw [331]

Answer:

]l;[

Explanation:

8 0
3 years ago
What is one potential result of climate change that could inhibit (reduce) kelp's ability to do photosynthesis?
Bogdan [553]
One potential result of climate change is greenhouse effect that is defined as the accumulation of carbon dioxide in the atmosphere that retains heat radiated from the sun. While this can seem beneficial because plants use carbon dioxide in photosynthesis, elevated levels of carbon dioxide actually inhibit photosynthetic mechanisms (Xu, 2015).
3 0
3 years ago
Help me please it’s do 10 minutes
Dmitry_Shevchenko [17]
Option B is the correct answer
5 0
2 years ago
Read 2 more answers
Other questions:
  • Which definition correctly describes a haploid cell during meiosis?
    6·2 answers
  • WILL GIVE A BRAINLEST
    12·2 answers
  • In a population of beetles, about 1 in every 6 beetles is slightly smaller and lighter in color than the others. the small, ligh
    8·1 answer
  • a trait that improves an individuals ability to survive and reproduce in a specific environment is called
    8·1 answer
  • S waves DO NOT have the following characteristic
    6·1 answer
  • Lactic acid build up in muscles is a sign that ________.
    5·1 answer
  • HURRREEYYYYY PLEAASSEEEE!!!
    14·1 answer
  • 3
    10·2 answers
  • What is a DNA fingerprint? (FORENSICS)
    6·1 answer
  • Plants have many characteristics.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!