Receptors for sperm binding in mammals are present on
Zona pellucida
Corona radiata
Vitelline membrane
Perivitelline space
The Correct Option is A
Solution and Explanation
The correct answer is option (A):Zona pellucida
Top Questions on Human health and disease
Read the following passage and answer the questions that follow. Prevention is the frontline response to drug use. Effective interventions address the underlying conditions contributing to drug use, such as a lack of connection to family or community, instability, insecurity, trauma, mental health issues, etc. When addressed, these factors can effectively prevent the initiation of drug use and the progression to drug use disorders. Study the few key figures of drug use given below and answer the questions that follow.
(a) What do you infer from the figures in Table No. 1 about the people with drug use disorders, 2022 (in million)? State any two of your observations.
(b) How are Hepatitis C and HIV related to drug use disorders by people, as shown in Table No. 2? State the correlation between the two.
(c)
- [(i)] Give the scientific name of (p) shown in Table No. 1.
OR - [(ii)] Give the scientific name of (q) shown in Table No. 1.
- CBSE CLASS XII - 2025
- Biology
- Human health and disease
- [(i)] Give the scientific name of (p) shown in Table No. 1.
- Explain unique features of acquired immunity.
- Maharashtra Class XII - 2025
- Biology
- Human health and disease
- Which of the following is caused by unsterilized needle?
- Maharashtra Class XII - 2025
- Biology
- Human health and disease
- In the life cycle of a {Plasmodium, once the sporozoite enters the blood of the host, it invades the hepatic portal system, resulting in occurrence of change in the host body, leading to malaria
A. Sporozoite enters the hepatocytes and divides by schizogony leading to formation of cryptomerozoites
B. Inside RBCs, the micro-metacryptozoites become rounded and modify into a young trophozoites.
C. As the trophozoite grows in size, a central vacuole is developed so that the nucleus is pushed to one side into the peripheral cytoplasm, leading to amoeboid stage.
D. In Amoeboid stage the small red eosinophils granules appear in the cytoplasm of the host corpulses as Schuffner's granules}
Choose the most appropriate answer from the options given below:- CUET (PG) - 2025
- Zoology
- Human health and disease
- Match LIST-I with LIST-II
\begin{tabularx}{0.8\textwidth}{|l|X|l|X|} \hline \multicolumn{2}{|c|}{LIST-I} & \multicolumn{2}{c|}{LIST-II}
\multicolumn{2}{|c|}{Types Cancer} & \multicolumn{2}{c|}{Tissues involved}
\hline A. & Carcinoma & I. & Muscle
B. & Chondroma & II. & Cartilage
C. & Sarcoma & III. & Blood
D. & Myeloma & IV. & Epithelial Tissue
\hline \end{tabularx}
Choose the most appropriate answer from the options given below:- CUET (PG) - 2025
- Zoology
- Human health and disease
Questions Asked in NEET exam
- A body weighs 48 N on the surface of the earth. The gravitational force experienced by the body due to the earth at a height equal to one-third the radius of the earth from its surface is:
- NEET (UG) - 2025
- Gravitational potential energy
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
- An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressure at temperature \(27^\circ\)C. The mass of the oxygen withdrawn from the cylinder is nearly equal to: [Given, \(R = \frac{100}{12} \text{ J mol}^{-1} \text{K}^{-1}\), and molecular mass of \(O_2 = 32 \text{ g/mol}\), 1 atm pressure = \(1.01 \times 10^5 \text{ N/m}^2\)]
- NEET (UG) - 2025
- Ideal-gas equation and absolute temperature
- A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of \(60^\circ\) with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is (take \(g = 10\) m/s\(^2\)):
- NEET (UG) - 2025
- Common forces in mechanics
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
Concepts Used:
Male Reproductive System
The male reproductive system contains the external genitals (the penis, testes and the scrotum) and internal parts, including the prostate gland, vas deferens, and urethra. A man's fertility and sexual traits depend on the normal functioning of the male reproductive system, as well as hormones released from the brain.
Read More: Human Reproductive System
Organs and functions:
The male reproductive system is responsible for reproduction. It is made of the following parts:
Penis — the organ used for urination and sexual intercourse. It has spongy tissue which can fill with blood to cause an erection. It contains the urethra, which carries both urine and semen.
Scrotum — this is a loose bag of skin that hangs outside the body, behind the penis. It holds the testes in place.
Testes (or testicles) — these are a pair of egg-shaped glands that sit in the scrotum, on the outside of the body. They produce sperm and testosterone, which is the male sex hormone.
Epididymis — this is a highly coiled tube that lies at the back of the testes. All sperm from the testes must pass through the epididymis, where they mature and start to ‘swim’.
Vas deferens — this is a thick-walled tube joined to the epididymis. It carries sperm from the epididymis up to the prostate gland and urethra.
Prostate gland — this is a walnut-sized gland that sits in the middle of the pelvis. The urethra runs through the middle of it. It produces the fluid secretions that support and nourish the sperm.
Urethra — this is a tube that extends from the bladder to the external opening at the end of the penis. The urethra carries both urine and sperm.
Seminal vesicles — these are 2 small glands above the prostate gland that make up much of the fluid in semen.