Question

The middle piece of the sperm contains __.
(a) Proteins
(b) Mitochondria
(c) Centriole
(d) Nucleus

Answer 1

They are membrane-bound cell organelles that generate energy and are present between the head and the tail of the sperm cell.

Complete answer:
Sperm is the male reproductive cell or gamete which helps in the sexual mode of reproduction. It is mainly composed of sperm cells and bodily secretions. Sperm is a microscopic delicate structure in the male body. It is composed of a head, neck, a middle piece, and a tail. The whole body of sperm is enveloped by a plasma membrane. The sperm head contains an elongated nucleus that is haploid and its anterior portion is covered by a cap- like structure called the acrosome. The middle pieces have mitochondria, which provides the energy for the movement of the tail that facilitate sperm motility which is essential for fertilization.
- For normal fertility, at least 60 percent sperms must have normal shape and size and at least 40 percent of them must show vigorous motility.
- The formation of sperm is called spermatogenesis.
- Usually, the sperms were released from the seminiferous tubules and are transported by the accessory ducts.
- Secretions of the epididymis, vas deferens, seminal vesicle, and prostate are essential for the maturity and motility of sperms.
- he testicular hormones maintain the functions of male accessory ducts and glands.
- Sperm cells did not have the ability to divide and it also had a limited life span. But after the fusion with egg cells during fertilization, a new organism begins developing starting as a zygote.
So, the correct answer is “mitochondria”.
Note: The bodily secretions in the sperm include prostatic fluid and seminal fluid. Prostate fluid neutralizes the acidity of the vagina. Seminal fluid contains fatty acids, proteins, and fructose for the nourishment of sperm.