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प्रश्न
Define spermiation.
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उत्तर १
Spermiation is the process of releasing mature spermatozoa. In this, spermatozoa are shed into the lumen of the seminiferous tubule for transport.
उत्तर २
After spermiogenesis, sperm heads become embeded in sertoli cells from which they obtain their nutrition and finally get released into the lumen of seminiferous tubules. This process of release of mature sperms from sertoli cells is called spermiation.
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संबंधित प्रश्न
Give the name and function for ‘A’ and ‘B’ from the diagram given below
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
Male and female gametes are ______.
Name the hormones involved in regulation of spermatogenesis.
Identify True/False statement. Correct the false statement to make it true.
Oogenesis takes place in the corpus luteum.
Implantation of embryo occurs in ______.
______ type of reproduction occurs without fusion of gametes.
In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
Mention the differences between spermiogenesis and spermatogenesis.
Identify the given image and label its parts marked as a, b, c and d
Complete the analogy.
1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.
Identify the labels (i-iv) in the given diagram of the ovum.
Which of the following is diploid?
Middle piece of mammalian sperm possesses ______.
Sertoli cells are found in ______.
Gray crescent is the area ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
How many sperms are formed from 4 primary spermatocytes?
Mark the odd one.
Read the following and answer from given below:
Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.
Which cell division is involved in the formation of secondary oocytes?
Human milk differs from cow's milk because human milk contains:
Capacitation refers to changes in the ______.
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
What is the difference between a primary oocyte and a secondary oocyte?
Process of maturation and development of sperms ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
The process of gametogenesis is initiated by ______ and ______ hormones respectively.
