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3 years ago

What are the two main divisions of the nervous system

Biology

2 answers:

djyliett [7]3 years ago

5 0

Answer:

From a structural or anatomical point of view, the nervous system is divided into two: the Central Nervous System (CNS) and the Peripheral Nervous System (SNP).

Explanation:

The human nervous system develops in the dorsal area (the back) of the embryo as a hollow nerve tube, the neural or ependymal canal. The anterior part thickens to form the brain while the rest constitutes a single nerve cord: the spinal cord, together with the brain, forms the Central Nervous System (CNS). As the embryo develops, axons grow on both sides of the midline and join with connective tissue to give rise to pairs of spinal nerves (leaving the spinal cord) and cranial nerves (leaving the brain). These nerves and their ramifications form the Peripheral Nervous System, which consists of somatic nerves, which innervate the striated (skeletal) muscles, and the autonomic nervous system, which innervates the internal organs (viscera) .

kipiarov [429]3 years ago

4 0

Central Nervous System (CNS) (Brain and Spinal Cord)

Peripheral Nervous System (PNS) (Nerves to and form CNS)

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Brainstorm ideas for ways people could use sunflowers to reduce soil contamination by heavy metals?

Mama L [17]

Answer:

Seeds are being delivered to every mailbox in town, all in hopes of purifying the soil using a technique called phytoremediation.Sunflowers can absorb many different toxins and chemicals from the soil and then store those chemicals at the cellular level. Once they're absorbed, they won't leach back out again.

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3 years ago

The hydrolysis of GTP to GDP carried out by tubulin molecules ________________. Group of answer choices a) tips the balance in f

In-s [12.5K]

Answer:

The correct answer: C) allows the behavior of microtubules called dynamic instability.

Explanation:

Microtubules are structures that are part of the cytoskeleton and help provide structure and shape to eukaryotic cells, besides assisting in the transport of organelles and vesicles.

Microtubules are formed by the polymerization of a dimer of two tubulins.

Microtubules have the particularity of being able to easily assemble and disassemble, which enlarges and shrinks the microtubule respectively. This property of the microtubules is important to their functions and is called dynamic instability.

In order to achieve dynamic instability, tubulin dimers can bind two molecules of GTP - for polymerization to happen, one of the GTP molecules is hydrolyzed to catalyze the reaction, thus becoming GDP. In the same matter, the energy generated from the depolymerization with turn the GDP into GTP.

3 0

3 years ago

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list a

____ [38]

Answer:

A A

a Aa Aa

All the offspring have flower located at axial position

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

Explanation:

Let the allele "A" represent the characteristics of axial position of flower

Let the allele "a" represent the characteristics of terminal position of flower

Given -

"A" is dominant over "a"

F1 generation -

Two parents with homozygous genotype for both A and a are crossed . The punnet square for the cross between "AA" and "aa" is as follows -

A A

a Aa Aa

Thus the genotype of offspring is "Aa"

Since, "A" is dominant over "a", all the offspring have flower located at axial position

F2 generation-

The cross between two parents having heterozygous genotype "Aa" will take place .

The punnet square for the cross between "Aa" and "Aa" is as follows -

A a

A AA Aa

a Aa aa

Three offspring with genotype i,e Aa, Aa and Aa will have flower located at axial position

Only offspring with genotype "aa" will have flower located at terminal position

8 0

3 years ago

What is the difference between erepsin and trypsin

Vadim26 [7]

Trypsin is a serine protease found in digestive system of vertebrates. they are produced in the pancreas.it catalyzes the hydrolysis of peptide bonda, breaking down into smaller peptides
in tissue culture, trypsin is used to re suspend cells adherent to the cell culture dish wall.
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3 years ago

Which of the following is likely to be researched by an environmental scientist? a. the effect of oil spills on marine animals b

prisoha [69]

The correct answer is The effect of oil spills on marine animals.

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7 0

4 years ago