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
kupik [55]
3 years ago
9

which of the following structures allow materials to be exchanged easily with cells? arteries atria veins capillaries

Biology
2 answers:
abruzzese [7]3 years ago
7 0
Atria is a large part of the heart so too big for cells; arteries & veins lead away or to the heart.
Capillaries are the smallest vascular structures that allow materials to be exchanged easily between cells.
4vir4ik [10]3 years ago
4 0

Answer:

Capillaries

Explanation:

Capillaries are the smallest blood vessels in the human body. They connect arterioles (smallest arteries) to the venioles (smallest veins). They are made of inner endothelial layer and outer epithelial layer, thus they are only two layers thick. They play important role in circulation. The capillaries transport gasses, fluids, and nutrients in the body tissues and also facilitates exchange of gases (oxygen and carbon dioxide), diffusion of fluids and nutrients into the body tissues and transport of waste materials.    

You might be interested in
Genes a, b, and c are known to be in that linear order in an organism. A testcross is done that yields 20 double crossover proge
larisa [96]

Answer:

Explanation:

The observed frequency of the double crossovers (DCOs) is 20/1000, or 0.02. If there is no interference then this will be the same as the expected, which is just the product of the single crossover frequencies, that is, SCO frequency (a-b) x SCO freq. (b-c) = 0.02.

(a) Any combination of map distances whose product (a-b) x (b-c) = 0.02 is possible. However, three are most likely:

a 20 mu b 10 mu c

a 10 mu b 20 mu c

a 14.14 mu b 14.14 mu c

(b) The distances would be exactly the same.

(c) The expected number of DCO progeny would be 17.

4 0
4 years ago
PLEASE HELP ME<br> a. color<br> b. mass<br> c. shape<br> d. volume
Rufina [12.5K]

Answer:

C. Shape is the correct answer

Explanation:

I will have this screenshot at the bottom to let you know as proof this is correct.

Please Mark as Brainliest

Hope this Helps

3 0
3 years ago
What is an important characteristic of the plant cell wall?
salantis [7]


The best answer is b - it is rigid.

The cell wall is defined as the rigid, outermost layer found in plants and also certain bacteria, algae and fungi. It is absent in animal cells.

The plant cell wall is made up  cellulose which is a structural carbohydrate. The cell wall is rigid and thus offers structural support allowing plant such as trees to grow to great heights.

It also helps prevent water loss, helps protect against insects and pathogens and keeps the shape of the plant.


6 0
3 years ago
Read 2 more answers
Electricity will not generally cause
kramer

Electricity will not generally cause Internal bleeding

7 0
4 years ago
Why does putting your name on a health behavior contract indicate your commitment to the contract?
dimulka [17.4K]
Because it is written. A popular tool used for motivation and commitment is the use of written contracts and often does not even need to be as lengthy as a contract. A slip of paper or even another writing surface has been shown to significantly increase the likelihood of committing to that action. 

There is also premeditation involved when signing a contract or writing on a piece of paper. An individual has read and recognized the written words and then signed it according to a commitment to that act. As such there is a significant amount of thought put into the over procedure, and thus increases again the likelihood of an individual to be committed to completing those actions.

Aside from all the factors of motivation, the signing demonstrates commitment to the contract because that is fairly universally understood to be the way in which people recognize and formally commit to contracts. Whatever the context of the action, whether signing papers to buy a house or for a new job, the signing of the contract is the commitment of the individuals involved to complete the requirements within the contract. Although in this instance the healthier behavior most directly affects the individual who signs the paper.


7 0
3 years ago
Other questions:
  • Which statement best describes how a catalyst can speed up a chemical reaction? A) The catalyst makes lower energy pathways avai
    8·1 answer
  • How frequently do most coastal areas experience high tides? twice a day twice a month four times a day four times a month
    13·2 answers
  • Because plant cells contain both mitochondria and chloroplasts, but animal cells only contain mitochondria, it is thought that e
    14·1 answer
  • Precapillary sphincters will a. cause blood to flow directly from the metarteriole into the postcapillary venule. b. control blo
    15·1 answer
  • Describe some of the characteristics of living things (not just humans)
    10·1 answer
  • Once an egg has been fertilized: multiple choice
    9·2 answers
  • Every time energy is transferred between organisms in a food web, some of the energy is lost as heat. TRUE or FALSE.
    6·1 answer
  • What do you mean by derived unit ? Give example?​
    14·1 answer
  • What happens if antibodies attach to antigens on the red blood cells?
    8·1 answer
  • Where are the bound ribosomes found?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!