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
marta [7]
3 years ago
11

Please help !!!!!!!!!!!!!!!!!!

Biology
1 answer:
max2010maxim [7]3 years ago
3 0

Answer:

Explanation:

15. 9 g

16. 11 g

17. 2 0r 3 g

18. ?

You might be interested in
The prolonged electrical depolarization of cardiac muscle cells that occurs during contraction is due primarily to the persisten
luda_lava [24]

Answer:

The prolonged electrical depolarization of cardiac muscle cells -that occurs during contraction- is due primarily to the persistent influx of calcium ion

Explanation:

The action potential of the heart muscle is longer with respect to skeletal muscle (around 300 milliseconds), and this is due to the activity of calcium (Ca⁺⁺ ) in the intracellular compartment.

The initial depolarization of cardiac muscle fiber depends on the entry of sodium (Na⁺) into the cell. However, for the action potential to occur and be maintained, Ca⁺⁺  must increase its cytoplasmic levels, which depends on:

  1. The increase in intracellular sodium induces the release of Ca⁺⁺ from the sarcoplasmic reticulum.
  2. Calcium entry from the extracellular space through the voltage dependent Ca⁺⁺ channels.
  3. The entry of extracellular Ca⁺⁺ causes the release of more Ca⁺⁺ ions by the sarcoplasmic reticulum, further increasing its intracellular concentration.

This is how the ion that guarantees the duration of the action potential of the cardiac muscle cell is the Ca⁺⁺.

Learn more:

Calcium, sodium and cardiac muscle cells brainly.com/question/4473795

4 0
3 years ago
Why do phospholipids form a bilayer in water
Gre4nikov [31]
Phospholipids will form a bilayer in water because they contain hydrophobic (Water fearing.. in this cause water "hating") tails and hydrophilic heads (water loving). So they form a bilayer to remove the tails from water likewise, this satisfies the hydrophilic heads because they are still exposed to water.
8 0
3 years ago
To which kingdom does this species mostly likely belong?
Varvara68 [4.7K]

Answer:

Animal kindom

Explanation:

the species most likely belong to the animal kindom

5 0
3 years ago
Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. W
prohojiy [21]
The most likely cause of the beak variation is the food source of the finch, the break size and shape was adapted to most likely have easier and better access to food.  <span />
5 0
3 years ago
Read 2 more answers
Describe convection and give an example
daser333 [38]

Answer:

Everyday Examples of Convection

This hot water rises and cooler water moves down to replace it, causing a circular motion. radiator - A radiator puts warm air out at the top and draws in cooler air at the bottom. ... ice melting - Ice melts because heat moves to the ice from the air.

Explanation:

Plz brainliest

7 0
3 years ago
Other questions:
  • The S-P interval of seismic waves recorded at a seismometer is 8 minutes. Approximately how far away is the earthquake’s epicent
    5·2 answers
  • How do neurons use neurotransmitters to communicate with each other and with the body?
    12·1 answer
  • 1. In pea plants, round seeds (R) are
    15·1 answer
  • How does a plant use the sugar molecules produced by photosynthesis that are not used for cellular respiration
    12·2 answers
  • Which of the following is on one end of all charged tRNA molecules?
    11·1 answer
  • Topsoil is _____.
    12·2 answers
  • Differentiate between the amount of initial energy from
    9·1 answer
  • NASA has proposed a mission to one of Jupiter's moons to look for potential signs of life. The spacecraft will have 9,862.5 Joul
    11·1 answer
  • 1. Why is the nitrogen cycle important?
    13·1 answer
  • Describe the data used by Watson and Crick to determine the structure of DNA
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!