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
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(C) Water-soluble organic nutrients go into the soil and get precipitated in the process of leaching.
(D) Humification follows mineralisation.
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A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
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- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
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Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
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List I
List II
A Mesozoic Era I Lower invertebrates B Proterozoic Era II Fish & Amphibia C Cenozoic Era III Birds & Reptiles D Paleozoic Era IV Mammals - NEET (UG) - 2024
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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.
