Structure of Sperm MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
-
Structure of Sperm is considered one of the most asked concept.
-
19 Questions around this concept.
Solve by difficulty
EASYWhich one of the following is not the function of placenta ? It:
Match List - I with List - II:
| List - I | List - II | |
|---|---|---|
| A. Head | — | I. Enzymes |
| B. Middle piece | — | II. Sperm motility |
| C. Acrosome | — | III. Energy |
| D. Tail | — | IV. Genetic material |
Concepts Covered - 1
Structure of Sperm
- It is a microscopic structure composed of a head, neck, a middle piece and a tail.
- Head:
- The sperm head consists of mainly the nucleus and acrosome.
- The genetic function is embodied in the sperm nucleus which consists almost entirely of DNA plus nuclear proteins and thus is responsible for the transmission of hereditary characters from the male.
- At the anterior end of the sperm nucleus, occurs a cap-like structure called the acrosome.
- A large number of enzymes especially hydrolases are also present in the acrosome.
- It also contains two most important enzymes such as hyaluronidase and zona Lysin or acrosin which functions during sperm entry into the ovum.
- Neck:
- The neck is a short, slightly constricted segment made up of projections located between the base of the head and the mitochondrial helix of the middle piece.
- The two Centrioles lie at right angles to each other are proximal and distal Centriole.
- The distal Centriole forms and gives attachment to the axial filament of the sperm tail; the proximal Centriole has no active function in the spermatozoon but is a potential activist within an egg during first cleavage division of the fertilized egg.
- Middle piece:
- Anatomically, the mitochondrial sheath and the outer ring of coarse fibres characterize the mammalian sperm midpiece.
- It is that part of the flagellum which lies between the neck and annulus and forms the most important site for various metabolic activities of the sperm.
- Tail:
- It is several times longer than the head.
- It is made up of axial filament surrounded by a thin layer of cytoplasm.
- The end-piece is made up of naked axial filament.
- It provides motility to the sperm.
Study it with Videos
Structure of Sperm"Stay in the loop. Receive exam news, study resources, and expert advice!"
Books
Reference Books
Clear your Basics with NCERT
E-books & Sample Papers
Get Answer to all your questions
Begin a career in Medical and Allied Sciences. Admissions Open for
NAAC A+ Accredited| Ranked #24 in University Category by NIRF | Applications open for multiple UG & PG Programs
Amity University | B.Sc Admissions 2026
ApplyAmong top 100 Universities Globally in the Times Higher Education (THE) Interdisciplinary Science Rankings 2026
Amity University Health and Allied Sciences Admissions
ApplyAmongst top 3% universities globally (QS Rankings) | Wide Range of scholarships available