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
PtichkaEL [24]
2 years ago
11

How are mature and newborn skull different regard to composition

Biology
1 answer:
prisoha [69]2 years ago
8 0

Answer:

Explanation:

Su cabeza es proporcionalmente mucho más grande.La cabeza de un recién nacido representa aproximadamente 1/4 parte de su masa corporal, mientras que la de un adulto entre 1/7 y 1/8 parte. b) La musculatura de un bebé es muchísimo más débil que la de un adulto, especialmente en la zona cervical.

You might be interested in
While visiting Costa Rica, where would we go to see if sea turtles were nesting?
mash [69]
Tortuguero National Park
6 0
3 years ago
You are a scientist working in a research lab. You receive a new cell specimen that you
Kaylis [27]

Answer:

eukaryote

Explanation:

That small, dark circle in the center of the cell is the nucleus .Prokaryotes do not have nucleus.

5 0
2 years ago
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
What is a key part of Darwin's idea of natural selection
dimaraw [331]
The animals that cannot adapt to their changing enviroment will not be able to survive and reproduce.
6 0
2 years ago
Which of the following tools would be useful for testing cleavage and fracture in a mineral?
Anon25 [30]
I think the correct answer from the choices listed above is the first option. THe tool that would be <span>useful for testing cleavage and fracture in a mineral would be a hammer. It can test how a mineral acts when subjected to a very large amount of pressure or force. Hope this answers the question.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • Based on figure 21-1 ,animals are most closely related to
    9·2 answers
  • How does the formation of oil differ from the formation of coal
    15·1 answer
  • Which of the following components is NOT part of the modern cell theory?
    13·1 answer
  • Which conclusion can be supported by the fact that explorers introduced dogs and horses in Florida?
    8·1 answer
  • In active transport, molecules are moved across
    9·1 answer
  • Write a claim, evidence, and a reason. About What is the relationship between photosynthesis and cellar respiration
    11·1 answer
  • What is the difference between cloning and selective breeding?
    6·2 answers
  • why do saturated fatty acids have straight structures while unsaturated fatty acids have bent structures
    8·1 answer
  • Protein Omicron contains 4 subunits. Two subunits are 65 kDa in size and are held together by a disulfide bond. One subunit is 8
    5·1 answer
  • a dna molecule that is 1000 base pairs in length would go in the gel than a molecule that is 200 base pairs in length. question
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!