Reason, why hair loss is more in old age:
- Reduction of blood supply
- Decrease in protein synthesis
- Low energy production
- Reduced storage of glycogen
The Correct Option is A
Solution and Explanation
Hair loss is more common in old age due to a combination of factors, including reduction in blood supply, changes in hormone levels, and the aging of hair follicles. As people age, the blood circulation to the scalp can decrease, affecting the health and nourishment of hair follicles. Additionally, hormonal changes, such as a decrease in estrogen and progesterone in women and changes in androgen levels in both sexes, can contribute to hair thinning and loss. Furthermore, the aging process can cause hair follicles to become less active and result in slower hair growth, leading to increased hair loss.
So, the correct option is (A): Reduction of blood supply
Top Questions on nutrient cycling
- Which of the following is required for the growth of both plants and seeds?
- MHT CET - 2025
- Biology
- nutrient cycling
- Choose the correct statements with respect to decomposition from the following:
(A) Decomposition is an anaerobic process.
(B) Decomposition rate of detritus depends upon the chemical nature of it.
(C) Water-soluble organic nutrients go into the soil and get precipitated in the process of leaching.
(D) Humification follows mineralisation.
Choose the correct answer from the options given below:- CUET (UG) - 2024
- Biology
- nutrient cycling
- The process of mineralization by microorganisms helps in the release of:
- CUET (UG) - 2024
- Biology
- nutrient cycling
- Toxicity of which micronutrient induces deficiency of iron, magnesium and calcium ?
- KCET - 2023
- Biology
- nutrient cycling
- Deficiency of which nutrient causes yellowing of leaves and stunted growth?
- CUET (PG) - 2023
- Agroforestry
- nutrient cycling
Questions Asked in NEET exam
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
- NEET (UG) - 2025
- Moment Of Inertia
The current passing through the battery in the given circuit, is:
- NEET (UG) - 2025
- Current electricity
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
- Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h in the direction X to Y. She notices that a bus goes past her every 30 minutes in the direction of her motion, and every 10 minutes in the opposite direction. Choose the correct option for the period T of the bus service and the speed (assumed constant) of the buses.
- NEET (UG) - 2025
- Relative Velocity
- The intensity of transmitted light when a polaroid sheet, placed between two crossed polaroids at \(22.5^\circ\) from the polarization axis of one of the polaroids (\(I_0\) is the intensity of polarised light after passing through the first polaroid):
- NEET (UG) - 2025
- Polarization
Concepts Used:
Nutrient Cycling
“A nutrient cycle is defined as the cyclic pathway by which nutrients pass-through, in order to be recycled and reutilised. The pathway comprises cells, organisms, community and ecosystem.”
How nutrient cycling differs from energy flow?
The energy flow refers to the transfer of energy from one trophic level to another in the food chain and food web. It is unidirectional and energy is lost from one trophic level to another in the form of heat. Sunlight is the ultimate energy source.
Nutrient cycling is a cyclic process that encompasses the movement of nutrients from the physical environment to living organisms and back to the environment. Nutrients are present on the earth where they are recycled, transformed into different forms and reutilized.
