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
aleksandrvk [35]
3 years ago
14

Why are surface antigens on sperm cells not recognized as “self,” and why do they require a blood-testis barrier to prevent anti

body formation?
Biology
1 answer:
qaws [65]3 years ago
6 0

Answer: Sperm cells are recognised as foreign cells by the immune system and requires blood testis barrier to prevent antibody formation.

Explanation:

Shortly after birth, the immune system of an individual starts to recognize the surface antigens of its body cells as 'self' and avoids forming an antibody against it. Spermatozoa (sperm cells) are formed at puberty, between the age of 10 and 14. Hence, the body immune system will recognise the antigen on the sperm cells as 'non-self' and stimulate antibodies against it. This is prevented by the blood testis barrier.

The blood testis barrier which are formed from the Sertoli cells at the seminiferous tubules helps in the isolation of the sperm cells and protects it from immune surveillance. This barrier also prevents sperm cells from coming in contact with blood.

You might be interested in
What is the TECTONIC CYCLE? Briefly summarize it.
igomit [66]
<span>In simple terms, heavier plates get melted in Mantle, become lighter in form of lava and create new plates. As we have a re-cycle or the convection currents, there are cycles in lithosphere.
There is continuous push and pull happening on and below the Earth. When a plate is subducting on one end, there has to be some reaction on the other end, right?
Ridge is developed on the other side, where the same material which has been melted on the subduction side helps to fill the gap at ridge side. Since the material is just transfered from heavy to light, and reused in that cell, it is called a cycle.
****Hope this helps!!! also...... please take a look at my profile, if you are a girl who dances.... WE NEED VOLUNTEERS!!!! Thanks! Merry christmas!!! and if possible, pick my answer as brainliest!!
</span>

4 0
2 years ago
Identify each of the cell structures indicated in Figure 7–7 and explain its role in the cell.
Ilya [14]
<span>A. rough ER
B. cytoplasm
C. Golgi body
D. Nucleolus
E. Nucleus
F. mitochondria
G. smooth ER
H. ribosome
I. cell membrane</span>
4 0
3 years ago
Acetylcholine receptors and acetylcholinesterase are membrane proteins that can be found on the ____________________ cell of a s
Masja [62]

Answer:

<h2>Postsynaptic </h2>

Explanation:

Acetylcholine receptor is a kind of integral membrane protein that has a very important role in the binding of neurotransmitters such as acetylcholine and some other. Generally, these receptors are present on the postsynaptic cells to receive acetylcholine neurotransmitter to initiate the signal in the neurons cells and some other.  

     Acetylcholinesterase is a kind of important enzyme that has many important functions in the dissociation of acetylcholine and some other that function as neurotransmitters. This enzyme is also present in the postsynaptic cells.  

6 0
3 years ago
What kind energy is made from the energy released from the chemical bonds of glucose
serious [3.7K]
Adenosine triphosphate
7 0
3 years ago
If an organism’s diploid chromosome number is 18, how many different possible combinations of homologous chromosomes lining up d
MA_775_DIABLO [31]
<span>D. 9 </span>

<span>Notice that diploid cells which 18 are the complete number of chromosome pair of the organism. This usually happens under cell divison –mitosis which process of replicating oneself to produce another like cell. Meiosis occurs in gametes, sex cells. Their respectively called spermatogenesis (sperm cells) and oogenesis (egg cells). These cell division –meiosis produces haploid cells, in which in words “half” from the complete cell chromosome number, hence, these </span>haploid cells<span> only produce half number or one set of chromosome (9) instead of the complete pair which in this case, 18.<span>
</span></span>
7 0
3 years ago
Other questions:
  • Australopithecus is an ape that lived in trees but could walk on two feet. How might fossil from Australopithecus provide eviden
    7·2 answers
  • What are three ways global warming might affect the water cycle
    11·2 answers
  • What is an organisms niche
    10·2 answers
  • What is a functionally specialized region of a cell membrane, typically characterized by the presence of specific proteins, call
    10·1 answer
  • What are the two main functions of the enzyme DNA polymerase during DAN replication?
    11·1 answer
  • Rosalind franklin used x-ray diffraction to study wet dna. her data were used by james watson and francis crick to determine the
    6·1 answer
  • Holly is a healthy woman who is 22 years of age. using this information, calculate her target heart rate zone for moderate-inten
    9·1 answer
  • The retreat of the shallow seas of the Paleozoic left much of Virginia exposed during the Permian and Mesozoic. In central Virgi
    11·2 answers
  • Which of the following is most likely true of a core sample of old, mature soil
    10·1 answer
  • How might compound leaves and leaves with lobed margins be well-suited to windy environments?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!