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
Zarrin [17]
3 years ago
10

1. What causes the autorhythmicity or action potentials of the nodal cells? a. A decrease in chloride permeability b. A gradual

calcium efflux or movement out of the cell c. A gradual depolarization of the cell membrane until threshold is reached d. A gradual repolarization of the cell membrane until threshold is reached
Biology
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

The correct answer will be option-C

Explanation:

The rhythm of the heartbeat is controlled by the pacemaker of the heart called the sino-atrial node.

The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.

This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.

Thus, Option-C is the correct answer.

You might be interested in
The fusing together of two gametes at fertilization is _____ reproduction. Asexual or sexual?
Jet001 [13]
Reproduction is sexual.
3 0
3 years ago
Read 2 more answers
Select the correct answer.
lisov135 [29]
A. Separated twins develo traits that differ according to the environments in which they are raised
4 0
3 years ago
Read 2 more answers
A. Look carefully the next image, label its parts with the words from the box: SPINAL CORD CEREBRUM CEREBELLUM PERIPHERAL NERVES
MissTica

No

<h2 /><h2>You're welcome please give brainliest</h2>
5 0
2 years ago
You tear a piece of paper in half to make it smaller. What type of property
andrey2020 [161]

Answer:

D. A physical property

8 0
3 years ago
Read 2 more answers
5. All the living things on Earth form the ______
agasfer [191]

Humans Come From A Guy Sperm It Goes Into The Females Egg

6 0
2 years ago
Read 2 more answers
Other questions:
  • Think about what the terms density-dependent and density-independent mean. Which of the following statements about how density-d
    13·1 answer
  • which is a true fact about two rocks belonging to the same age one containing fossils of an amphibian and the others containing
    13·1 answer
  • Which part of cellular respiration breaks down glucose into pyruvate?
    13·2 answers
  • What positive effect might a rainstorm have in the long term?
    10·1 answer
  • What are the five Sense organs?
    13·1 answer
  • PLZ HELP ASAP<br> MARKING
    6·1 answer
  • Which amino acid is best represented by "CCA"? *
    7·1 answer
  • ANSWER QUICKLY!!
    5·2 answers
  • A hive is an example of what type of skin eruption?
    12·2 answers
  • Describe the biological community and an ecosystem to which you belong.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!