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
yKpoI14uk [10]
2 years ago
5

Ravi ran 200 metres race in sports day. He feels that his heart was beating faster than usual. a) Why was his heart beating fast

er? b) Which all organs are involved along with the heart to help Ravi complete his race?
Biology
1 answer:
ipn [44]2 years ago
7 0
<h3><u>Answer:</u></h3>

<u>(a) Reason for the heart beating fast:</u>

  • When we exercise/run the muscles work hard and need more oxygen.
  • So, when Ravi's heart beats faster more blood can be pumped to the muscles thus giving the oxygen required.

<u>(b) Organs involved along with the heart to help Ravi complete his race:</u>

  • The main organs involved along with the heart are quadriceps, hip flexors, hamstring, glutes and calf muscles.
  • The nervous system, muscular system, skeletal system, respiratory system and circulatory system function effectively when a person runs.
You might be interested in
Bryophytes never formed forests (mats, yes, but not forests) because ________. a. they possess flagellated sperms.
maria [59]

Answer:

c. They lack lignified vascular tissue

Explanation:

We know that forest consists of tall trees. In the tall trees the water and minerals are transported to the every part of tree through the lignified vasucular tissue. This tissue not only helps in transport within the tree but also provides some sort of mechanical strength due to the presence of lignin it its walls. On the other hand bryophytes are non-vascular plants which means they lack vascular tissue and thus a mechanism for long distnace transport of water and minerals is absent in them. So they can't be taller as a tree and thus can't form forest.

8 0
3 years ago
is it true that The strength of the electric field of a charged particle becomes greater as the distance from the particle incre
Vladimir [108]
Well if you're talking about the distance from one charged particle to another then the change from the particle stays the same unless there is polarization, but the electric field/charge stays the same
5 0
3 years ago
Read 2 more answers
Which stimulus causes the roots of seedling to grow downard ?
Sergeu [11.5K]
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
7 0
3 years ago
1. How does the cell membrane allow animals to move without rupturing the cells in the body?
oksian1 [2.3K]

.

Explanation:

1)The cell membrane functions as a semi-permeable barrier, allowing a very few molecules across it while fencing the majority of organically produced chemicals inside the cell. Electron microscopic examinations of cell membranes have led to the development of the lipid bilayer model (also referred to as the fluid-mosaic model). The most common molecule in the model is the phospholipid, which has a polar (hydrophilic) head and two nonpolar (hydrophobic) tails.

2) simple diffusion across the cell plasma membrane. The structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down the concentration gradient is , by simple diffusion.

3) some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic or however, because they are charged the polar, they can't cross the phospholipid part of the membrane without help .

4) during fission a copy of the DNA is made and attached to the cell membrane as well. As this cell elongate in preparation for fission, the two DNA copies are pulled apart two opposite ends of the cell. New membrane material is deposited between the two ends of the cell, and a new wall grows between them .

5) UMASS STEM-ED From Bubbles to Cell Membranes Workshop. Bubble ... dynamic nature which can't be properly appreciated in a static textbook. ... the small thread through one of the straws.

6) example of passive transport and active transport across a cell membrane so, cell membranes are semipermeable meaning they have control over what molecules can or cannot pass through. Some molecules can just drift Inn.

4 0
3 years ago
Which best describes the functional role of cyclic adenosine monophosphate?
Murrr4er [49]

The cyclic adenosine monophoaphate, or the cAMP is a second messanger for multiple biological processes. The glucose, sugar and lipid metabolism is regulated by the cAMP or cyclic adenosine monophosphate. Itis the derivative of the ATP (Adenosine Triphosphate), and used for the purpose of the signal transduction. Besides this, the brain function is also affected by the cAMP.

7 0
3 years ago
Other questions:
  • Which best describes the following impacts: water storage, clean energy, and flood prevention?
    6·1 answer
  • Imagery and cognitions would not be possible without the functioning of the _______ system.
    8·1 answer
  • An individual cell is able to make copies of its genetic information but it's unable to produce encoded proteins. this indicates
    11·1 answer
  • Satellites are important to oceanographic research because they can quickly survey the surface of the earth.
    11·2 answers
  • Which of these is a good reason to use natural gas instead of another fossil fuel? A. It is considered safe to use in homes b. E
    6·1 answer
  • Describe why biologists consider an earthworm to be an organism
    15·1 answer
  • The layer cells that enclose the vascular tissue in the central region of the root is the?
    15·1 answer
  • Which of the following statements is false?
    13·2 answers
  • Which BEST
    5·1 answer
  • DNA and RNA are nucleic acids made up of long strands of 100's of nucleotides. What is the only difference in each nucleotide?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!