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
Nat2105 [25]
3 years ago
14

Which of the following statements regarding proteoglycans is FALSE? Proteoglycans help tissues resist mechanical compression. Pr

oteoglycans are a major component of compact, dense connective tissues like bone. The negative charge associated with proteoglycans attracts cations, which cause water to be sucked into the extracellular matrix. Proteoglycans are comprised of a core proteins with many glycosaminoglycan polysaccharide chains covalently linked to it. The glycosaminoglycans are very hydrophilic and therefore extend out to fill a large amount of space in the extracellular matrix.
Biology
1 answer:
Alexandra [31]3 years ago
3 0

Answer:

 Proteoglycans are a major component of compact connective tissues but are relatively unimportant in watery tissues such as the jellylike substance in the interior of the eye.

Explanation:

these are protein that is divided into two classes which are  called large ans small Proteoglycans.

The large proteoglycans has a large number of highly sulfated glycosaminoglycan side-chains that tends to hold water and whereby making the tendon to resist compression while the  small proteoglycans are known to have a relationship with collagen fibrils which are known to regulate collagen fibril diameters. they help in signal regulation  usually  from the angle of intracellular compartments. the are known great for their large diversity especially in terms of different cores and different numbers of GAGs with different lengths and composition.

You might be interested in
Quiz
Umnica [9.8K]

Answer:

wheres then diagram?

Explanation:

4 0
3 years ago
Which events take place in the light-dependent reactions of photosynthesis?
borishaifa [10]

The correct answer is : Light energy is captured by plants; light energy is converted to chemical energy.

In the process of photosynthesis, special pigment molecule called chlorophyll can capture the energy of the light, more specifically the photon. When a particle of light (a photon) with a specific energy reaches this pigment in the leaves of plants, the energy is transferred from the particle to the molecule, and the molecule becomes excited. This is the phase where the energy of the light is captured and transformed into chemical energy that can later be used to make sugars.

All of the later chemical processes that transfer the energy from the excited chlorophyll to the sugar molecules are not dependent on the light and can happen during the night as well.

3 0
3 years ago
Read 2 more answers
(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps deter
Viefleur [7K]

Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. <em>The mode of transport is </em><u><em>active transport. </em></u>

-------------------------------------------------

There are three main different types of transport across the membrane

  • Simple diffusion ⇒ <em>Does not need energy to occur</em>
  • Facilitated transport ⇒ <em>Does not need energy to occur</em>
  • Active transport ⇒ <em>Needs </em><em>energy </em><em>to occur</em>

Active transport is the transport of molecules that move <em>against the </em><em>electrochemical gradient</em>, so it does <em>need energy </em><em>to happen</em>.

Molecules move from the lower concentration side to the higher concentration side of the membrane.

Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.

In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.

  • The cells maintain a <u>120 mM </u><u>intracellular concentration</u><u> </u>of substance L.
  • Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).

Table 1. Rate of entry of substance L into mammalian cells in culture

<em><u>External concentration of substance(mM)      Rate of entry of substance L </u></em>

                     10                                                                     5%

                     20                                                                    25%

                     30                                                                    45%

                     40                                                                    65%

                     50                                                                     80%

                     60                                                                     90%

                     70                                                                      95%

                      80                                                                    100%

                      90                                                                    100%

                      100                                                                   100%

<em>Now, we need to identify the most likely </em><em>mode of transport </em><em>across the </em><em>membrane </em><em>for substance L, and explain how information provided helps determine the most likely mode of transport.</em>

We know that the intracellular concentration is 120mM.

As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.

As the concentration inside the cell is always higher than the concentration outside, we can assume that this is <u>not passive transport </u>because the molecule transport is going against its concentration gradient.

Hence, the remaining option is <u>active transport.</u> And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.

-------------------------------------------------------------

Related link: brainly.com/question/19098496?referrer=searchResults

6 0
3 years ago
The ability of muscle to shorten forcibly when adequately stimulated is known as ________
Andrej [43]

The ability of muscle to shorten forcibly when adequately stimulated is known as <u>contractility.</u>

Explanation:

  • Contractility is defined as the ability of muscle cells to contract forcefully to bring about movement in body organs.
  • The folding of arms are results of contractility of biceps and triceps.
  • Contractility of cardiac muscle to regulate pumping of heart is again a result of contractility of myocardial muscle.
5 0
3 years ago
Read 2 more answers
Describe one way osmosis and osmotic pressure is important to medicine.
OleMash [197]

Answer:

Since the beginning of life of the first multicellular organisms, the preservation of a physiologic milieu for every cell in the organism has been a critical requirement. A particular range of osmolality of the body fluids is essential for the maintenance of cell volume. In humans the stability of electrolyte concentrations and their resulting osmolality in the body fluids is the consequence of complex interactions between cell membrane functions, hormonal control, thirst, and controlled kidney excretion of fluid and solutes. Knowledge of these mechanisms, of the biochemical principles of osmolality, and of the relevant situations occurring in disease is of importance to every physician. This comprehensive review summarizes the major facts on osmolality, its relation to electrolytes and other solutes, and its relevance in physiology and in disease states with a focus on dialysis-related considerations.

3 0
3 years ago
Other questions:
  • When artery muscles contract, _____.
    9·1 answer
  • Red-green color blindness is an x-linked recessive condition in humans. a man with normal vision had 8 children with a women tha
    5·1 answer
  • A partial sequence of a molecule is "aactgct." the molecule is:
    11·1 answer
  • Cells lining the digestive tube are characteristic of this tissue category ____.
    14·1 answer
  • What's the importance of radioactive isotopes in determining the age of earth?
    7·1 answer
  • Of the Earth's liquid water inventory, most of the fresh water is stored in the form of ________.
    7·2 answers
  • Where do transcription and translation occur in prokaryotic cells??
    14·1 answer
  • Plzzzzz help me ASAP . WILL MARK AS BRAILEIST
    15·2 answers
  • Which are structures of the excretory system? Select four options.
    15·2 answers
  • 13. How do you identify the promoter gene?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!