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dalvyx [7]
3 years ago
10

DHEA is a hormone involved in muscle growth, bone density, and the functioning of the cardiovascular system. DHEA production inc

reases until about age 30 years of age and then decreases. The level of DHEA at age 80 is about what percentage of what it was at age 30?
Biology
1 answer:
sertanlavr [38]3 years ago
7 0

Answer:

5%

Explanation:

The adrenal cortex in both males and females produce a small amount of weak androgens. One of the major weak androgen secreted by adrenal cortex is dehydroepiandrosterone (DHEA).

Levels of dehydroepiandrosterone secretion exhibit changes with age. The dehydroepiandrosterone secretion increases till the age of 20-24 years and falls off with increasing age after the age of 30 years in both males and females. The DHEA production at the age of 80 years is about 5% of its secretion at the age of 30 years.

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Morgarella [4.7K]
When molecules uses energy for transportation across the cell, then it is known as "Active Transport"

So, option B is your answer.

Hope this helps!
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3 years ago
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What conclusions can we draw from the lab about photosynthesis and cellular
GuDViN [60]

Answer:

Carbon dioxide and oxygen are recycled through photosynthesis and cellular

respiration forever unless something interrupts.

Explanation:

Photosynthesis and cellular respiration are two distinct and opposite metabolical processes undergone by living cells. They are opposite processes because one utilizes the products of the other as reactants.

Photosynthesis is a unique process to autotrophic organisms like plants. It is the process whereby plants synthesize their food in form of organic molecules (glucose) by combining Carbondioxide (CO2) and water (H2O) in the presence of sunlight.

The overall equation of photosynthesis is as follows:

6CO2 + 6H2O ------> C6H12O6+ 6O2

On the other hand, cellular respiration is the process whereby living cells obtain energy (ATP) by breaking down food molecules (glucose) using oxygen to produce carbondioxide (CO2) and water as products. The overall equation is:

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Option B is incorrect because light energy from the sun powers photosynthesis while option C is incorrect because photosynthesis transforms light energy to chemical energy while cellular respiration transforms chemical energy to thermal energy.

7 0
3 years ago
The San Andreas fault is a transform fault. The map below shows a student's approximation of where the fault line crosses throug
VladimirAG [237]

Answer: Movement along fault line

Explanation:

Here's the remainder of the question:

Which map best predicts the likely movement of land along the fault line over thousands of years?

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Based on the question, the map that best predicts the likely movement of land along the fault line over thousands of years will be a movement along fault line.

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rusak2 [61]
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3 years ago
Climbing stairs, riding a bike, eating breakfast are all examples of what type of memory?
STatiana [176]

Answer:

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