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3 years ago

Where does spermatogenesis take place? vas deferens urethra testes penis

Biology

2 answers:

Alenkinab [10]3 years ago

7 0

Answer:

Testes

Explanation:

Spermatogenesis is the process by which haploid mature spermatozoa is produced from diploid germ cells through meiosis and cell differentiation in the male reproductive organ, TESTIS. Spermatogenesis is one of the forms of gametogenesis that occurs in males, as the other (oogenesis) occurs in females.

The testes are composed of numerous thin, tightly coiled tubules known as the SEMINIFEROUS TUBULES, whose wall the production of sperm takes place.

The process of spermatogenesis begins when diploid germ cells called Spermatogonia, undergoes mitotic division to produce two identical daughter cells. One of these cells (A-spermatogonium) will be used to replenish the pool of spermatogonia i.e ensure that the male is fertile throughout his adult life, while the other (B-spermatogonium) will eventually form the mature sperm cell.

This B-spermatogonium replicates by undergoing mitosis to form identical cells known as Primary spermatocyte. The primary spermatocytes undergo meiosis I to produce two haploid cells called secondary spermatocytes. These two cells undergo meiosis II to produce a total of four haploid cells called Spermatids.

N.B: This series of mitotic and meiotic divisions is called Spermatocytogenesis.

The Spermatids are released into the lumen of the seminiferous tubules from the seminiferous epithelium, a process known as Spermiation. In the seminiferous tubules, the spermatids undergo series of metarmophic change and differentiation into mature spermatozoa, until they reach the epididymis. This structural change, where the spermatids undergo nuclear condensation, formation of acrosomal cap and development of a tail, is known as Spermiogenesis.

The spermatozoa becomes stored in the epididymis and undergoes further maturation.

Vitek1552 [10]3 years ago

4 0

Answer:

seminiferous tubules

Explanation:

Spermatogenesis is the process by which the male gametes, called sperm, are created. Spermatogenesis takes place in the seminiferous tubules, which are an intricate system of tubules in the testes where spermatogenesis takes place.

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A_______________________mutation changes one base in the genetic code. Only one _____________________ may or may not be affected

zlopas [31]

Answer:

a Substitution point mutation changes one base in the genetic code. Only one nucleotide may or may not be affected. An insertion or deletion causes a frameshift mutation which affects all the amino acids following the mutation.

Explanation:

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2 years ago

Can others, besides athletes, benefit from skill-related fitness? why?

prisoha [69]

Yes, people besides athletes can benefit from skill-related fitness. Skill related fitness training can increase the coordination, reaction time, balance and agility of individuals at large, leading to an increased in ability to complete routine workplace tasks. Accident avoidance can be a benefit to cab drivers with increased reaction times. Wait staff can benefit from increased balance to skillfully carry large trays, Mechanics with good coordination are able to more quickly assemble complex components and in the even of a physical confrontation police officers can benefit from increased agility.

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3 years ago

Describe the process used for harvesting adult stem cells

Tomtit [17]

Answer:

Stem cell is taken either from bone marrow or from the blood directly

Explanation:

Stem cells are derived from two locations primarily a) Bone Marrow and b) Blood

The first step in this process is to remove the stem cell from its parent location and it is done in the following ways –

A) For deriving stem cell from blood – A drug with growth factor s is injected. Here no anesthesia is given to the patient. The growth factors leads to the movement of stem cells from bone marrow into the bloods. Blood with stem cells is taken out from the veins and filtered through the apheresis machine.

B) From Bone marrow – Bone marrow is removed from the pelvic bone through a needle and prepared for transplantation.

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3 years ago

The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the role

liberstina [14]

Answer:

Smooth ER:

Lipid synthesis, Calcium ion storage, Poison detoxification

Rough ER:

Protein synthesis

Golgi apparatus:

Protein modification and storage, Cisternal maturation

Lysosomes:

Autophagy, Macromolecule digestion

Explanation:

The endomembrane system is important for the production, processing, and transport of proteins and lipids in the cell.

The smooth ER:

It aids basically in lipid production and processing.

The smooth endoplasmic reticulum, or smooth ER, is an organelle that is observed in animal cells and plant cells. Itd basic function is the production of cellular products such as hormones and lipids.

The rough ER :

It is the spot of secretory protein production.

Rough endoplasmic reticulum is observed in eukaryotic cells. Its basic aid is to synthesize proteins. It consists of cisternae, tubules and vesicles. The cisternae comprise of flattened membrane disks, that play a major role in protein modification.

Golgi apparatus:

It helps in further processing of the proteins produces for the rough ER and then in sending them off in vesicles to the plasma membrane.

It's often termed the cell's post office. It modifies, sorts and arrange proteins for secretion. It aids lipid transportation around the cell, and the production of lysosomes.

Lysosomes:

Its enzymes are synthesized and formed in the rough ER and Golgi apparatus. It aid hydrolysis of macromolecules e.g. phagocytosis and autophagy.

It is involved in digestion and waste removal by feeding on worn-out organelles, food molecules, and engulfed viruses or bacteria.

8 0

3 years ago

Select the correct answer.

Assoli18 [71]

It will be C. solution

4 0

3 years ago