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Anna71 [15]
3 years ago
6

Tracey was learning about structural organization in animals. What level of structural

Biology
1 answer:
bearhunter [10]3 years ago
4 0

Answer:

A

Explanation:

Egg cell

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What is affected by the electrical signal sent by the fourth structure of the reflex arc?(This will be the fifth structure in th
Stells [14]

Answer:

The effector organ is affected by the fourth structure of the reflex arc.

Explanation:

When talking about the reflex arc, we refer to the sequence of events that occur for the body to react to an external stimulus.

In general terms, the peripheric nervous system receives information from a stimulus coming from the external environment. This information is sent to the central nervous system, where it is processed. From the CNS, another signal is sent as a response to the stimulus. This mechanism is known as the reflex arc.

Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.

There are three types of neurons involved in the mechanism:

• Afferent or sensorial neurons

• Interneurons

• Efferent or motor neurons

Action:

  • Ascending branch

The stimulus reaches the body and is received by the specialized sensory <u>receptors</u>. Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy. <u>Afferent neurons</u>, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.

  • Descending branch

Once the information reaches the central nervous system, it is processed by the<u> interneurons</u> that analyze it before sending a response. Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.

<u>Efferent neurons</u> receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the <u>effector organs</u>. The effector organ can be a muscle or a gland.

Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.

8 0
2 years ago
How are fossil fuels used in the harvesting of fresh apples from an apple tree?
lys-0071 [83]

The correct answer is option B

The use of fossil fuel in harvesting of apples lies at the stage when the apples fall from the tree. When there lots of apple that has to fall from the tree and picked up for sorting. Monster machines are used for the shaking of trees vigorously so that lots of apple fall at a same time. This machine use fossil fuel for its working.

5 0
3 years ago
Read 2 more answers
Every year _______ species go extinct.<br> a. 3<br> b. 72<br> c. 1000<br> d. 20000
Nezavi [6.7K]

c . 10000 its right i took the quiz

7 0
3 years ago
Read 2 more answers
PLEASE HELP!!!! WILL BE MARKED AS BRAINLIEST
kondaur [170]
fertilization comes first
it is followed by cleavage which is the rapid cellular division which forms the blastula
then comes gastrulation where the 3 germ layers are formed.
followed by organogenesis which consists first forms the organs and then comes the specialization
Therefore your answer would be B
6 0
3 years ago
A pair of amino acids is chemically bonded is called as,
N76 [4]

Answer:

Peptide bond

Explanation:

Peptide a short chain of amino acid; therefore the bond present is called peptide bond

3 0
3 years ago
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