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2 years ago

How is temperature regulated in the testes for maximal spermatozoa production?

2 answers:

8 0

Normal development in tests requires a temperature. cremaster muscle contract or relax to move testes toward or away from the body or to maintain the acceptable temperature for testicular.
The body temperature regulation is controlled by the autonomic nervous system under the guidance of medulla oblongata which is in the brain system.

Sonbull [250]2 years ago

5 0

Answer:

The temperature in testicles is controlled by their location and scrotum (its muscle layers)

Explanation:

The testicles in male body is located outside their body. This is so because it regulates the temperature requirement of testicles to produce spermatozoa and male hormone testosterone is sufficient amount. Since testicle is located outside the body, its normal temperature is 4 to 5 degree lesser than the normal body temperature. Also the scrotum covering the testicles also regulate the temperature for optimum spermatozoa development. There are three layers in a scrotum that helps controlling the temperature –

a) Tunica dartos (located inside the scrotum) – This layer is temperature sensitive. It relaxes when hot and contracts when cold

b) Cremaster muscle in the spermatic cord – Based on environmental temperature it regulates proximity of testicle to the body

c) Pampiniform plexus – It is the coil of testicular veins that cools the arterial blood entering the testicle

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2 years ago

In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of allele a is 0.2. what is the

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The Hardy-Weinberg equation is as follows:
$( {p + q})^{2} = 1$
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Where:
(convert all % to decimals)

p= homozygous dominant
q= homozygous recessive
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While you did not specify whether the 0.2 frequency was for dominant or recessive, we can still figure out the answer.

Using the 1st equation, we can solve for the other dominant/recessive frequency:

1-0.2=0.8

Meaning that:

p= 0.8 & q=0.2

If the heterozygouz frequency is 2pq, then it becomes a simple "plug & chug" sort of approach.

2(0.8)(0.2)= 2(0.16)= 0.32

So, the heterozygous frequency would be:
0.32

Hope this helps!

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2 years ago

In plants, chloroplasts are necessary for A. respiration. B. photosynthesis. C. secretion. D. both respiration AND secretion. E.

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B- Photosynthesis

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