Question:
(a) Draw a flow chart to show hormonal control of the human male reproductive system.
(a) Draw a flow chart to show hormonal control of the human male reproductive system.
Show Hint
Hypothalamus gives GnRH, the pituitary gives LH and FSH. LH acts on Leydig cells for androgens and FSH on Sertoli cells for sperm formation.
Updated On: Oct 23, 2026
Show Solution
Verified By Collegedunia
Solution and Explanation
Step 1: What the flow chart shows:
A labelled flow chart is expected. Here the boxes and arrows are written in the order in which they would be drawn.
The control starts in the brain and works through the testis.
Step 2: Flow chart, from the top:
Box 1: Hypothalamus. Arrow down: it secretes GnRH (gonadotropin releasing hormone).
Box 2: Anterior pituitary. It secretes two gonadotropins, LH (luteinising hormone) and FSH (follicle stimulating hormone).
Branch 1: LH acts on the Leydig (interstitial) cells of the testis. They secrete androgens, mainly testosterone.
Branch 2: FSH acts on the Sertoli cells of the seminiferous tubules. They secrete factors that help in spermiogenesis.
Step 3: End results and feedback:
Androgens stimulate spermatogenesis, support the male accessory organs and give the male secondary sexual characters.
Androgens also act as negative feedback on the hypothalamus and pituitary, and inhibin from the Sertoli cells reduces FSH.
This keeps the hormone levels balanced.
Final Answer:
Hypothalamus (GnRH) to anterior pituitary (LH and FSH). LH to Leydig cells to androgens to spermatogenesis. FSH to Sertoli cells to factors to spermiogenesis. Androgens and inhibin give negative feedback.
A labelled flow chart is expected. Here the boxes and arrows are written in the order in which they would be drawn.
The control starts in the brain and works through the testis.
Step 2: Flow chart, from the top:
Box 1: Hypothalamus. Arrow down: it secretes GnRH (gonadotropin releasing hormone).
Box 2: Anterior pituitary. It secretes two gonadotropins, LH (luteinising hormone) and FSH (follicle stimulating hormone).
Branch 1: LH acts on the Leydig (interstitial) cells of the testis. They secrete androgens, mainly testosterone.
Branch 2: FSH acts on the Sertoli cells of the seminiferous tubules. They secrete factors that help in spermiogenesis.
Step 3: End results and feedback:
Androgens stimulate spermatogenesis, support the male accessory organs and give the male secondary sexual characters.
Androgens also act as negative feedback on the hypothalamus and pituitary, and inhibin from the Sertoli cells reduces FSH.
This keeps the hormone levels balanced.
Final Answer:
Hypothalamus (GnRH) to anterior pituitary (LH and FSH). LH to Leydig cells to androgens to spermatogenesis. FSH to Sertoli cells to factors to spermiogenesis. Androgens and inhibin give negative feedback.
Was this answer helpful?
0
0
Top CBSE CLASS XII Biology Questions
- All algae have
- With a neat, labelled diagram, describe the parts of a typical angiosperm ovule.
- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte
- Draw a labeled diagram of male reproductive system.
- Draw a labeled diagram of female reproductive system.
View More Questions
Top CBSE CLASS XII The Male Reproductive System Questions
- Draw a well-labelled diagram of the sectional view of a male gametophyte/microspore of an angiosperm and write the functions of any two parts labelled. (Any four labels).
The features of some structures of human male reproductive system are given below. Choose the correct option that matches the features with the structures.
(i) It opens into the Vasa efferentia through rete testis.
(ii) It carries semen as well as urine.
(iii) It maintains temperature (2 - 2.5\( ^{\circ}\mathrm{C} \)) lower than body temperature for sperm formation.
(iv) It leads to vas deferens that ascends to the abdomen.
The path of the sperm transport is shown below. Identify P and Q and select the correct option.
Seminiferous tubules → Rete testis → P → Epididymis → Q → Urethra
Top CBSE CLASS XII Questions
- 2, b, c are in A.P. and the range of determinant $\begin{vmatrix}1&1&1\\ 2&b&c\\ 4&b^{2}&c^{2}\end{vmatrix}$ is [2, 16]. Then find range of c is
- A boy of mass 50 kg is standing at one end of a, boat of length 9 m and mass 400 kg. He runs to the other, end. The distance through which the centre of mass of the boat boy system moves is
- A capillary tube of radius r is dipped inside a large vessel of water. The mass of water raised above water level is M. If the radius of capillary is doubled, the mass of water inside capillary will be
- A circular disc is rotating about its own axis. An external opposing torque 0.02 Nm is applied on the disc by which it comes rest in 5 seconds. The initial angular momentum of disc is
- A circular disc is rotating about its own axis at uniform angular velocity \(\omega.\) The disc is subjected to uniform angular retardation by which its angular velocity is decreased to \(\frac {\omega}{2}\) during 120 rotations. The number of rotations further made by it before coming to rest is
View More Questions