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Bess [88]
3 years ago
9

Pain signals often have two components: an acute sensation of "first pain" which is felt almost immediately after an injury, and

a sensation of "second pain" which is felt slightly later after the injury. This suggests that neurons that send the signals that we perceive as first pain ___, and neurons that send the signals that we perceive as second pain ___.
Biology
1 answer:
o-na [289]3 years ago
5 0

Answer:

This suggests that neurons that send the signals that we perceive as first pain Myelinated Tpye A-delta___, and neurons that send the signals that we perceive as second pain Unmyelinated-Type C.___.

Explanation:

Physiologically, primary afferent neurons that innervated the the touch, pain, temperature,and pressure receptors in the effectors  to input sensory signals to the spinal cord and the brain  are categorized based on their diameter, sizes, and nature of  myelination. Based on this;

<u>A-alpha has the largest diameter, myelinated, and sensitive to sensation from the muscle cells</u>

<u>A-beta are next in diameter, myelinated and sensitive to sensation  of touch.</u>

A-delta followed in diameter, and  size. They are mylinated, and sensitive to pain and temperature.

<u>C-fibres are least in diameter, they are unmyelinated, but sensitive to pain, touch and temperature.</u>

<u />

<u>Therefore, if the speed of conduction,of action  potential in a neuron depends on the diameter(thickness) and myelination of the axon(saltatory conduction)</u> :

''then, acute sensation/ first pain should be transmitted by the A-delta fibre. While the the slower/second pain should be transmitted by the slower unmyelinated - C-fibres''.

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Answer:

b. a single temporal fenestra

Explanation:

Synapsids have a temporary fossa in the lower part of the temporal bone. These reptiles mamiferoides only have a single inferior temporal fenestra.

The synapsids were the first amniots to diversify and appeared  in the middle of the Carboniferous. These first synapses were characterized by the presence of a single temporary fenestra behind each orbit, through which the mandibular muscles pass.

4 0
3 years ago
Which of the following hand tools has a beveled end?
kondor19780726 [428]

Answer:

D) Chisel

Explanation:

chisel-A metal tool with a sharpened, beveled edge that used to cut and shape wood, stone, or metal

4 0
3 years ago
Many drugs that reach the developing fetus or embryo can cause death or congenital defects. what are examples of congenital defe
geniusboy [140]

• Skeletal and limb abnormalities

• Central nervous system alterations

• Heart defects

These are applicable in examples to many drugs that reach the developing fetus or embryo can cause death or congenital defects.

<h3>What is meant by congenital defects?</h3>
  • A congenital anomaly is a morphological or functional abnormality that appears during intrauterine life.
  • These illnesses, which are also known as birth defects, congenital disorders, or congenital abnormalities, arise during pregnancy and can be detected before or at birth as well as later in life.

<h3>What kinds of flaws are instances of congenital?</h3>
  • Cleft lip and palate are typically discovered during standard prenatal screenings.
  • congenital heart disease, which might include a hole in the heart, a valve issue, or a blood vessel issue. 
  • Usually identified in the first few years of life, cerebral palsy.

<h3>Each of the medications or drug classes listed below has the potential to give birth to abnormalities in an unborn child:</h3>
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  • alcohol
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To learn more about congenital defects visit:

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3 0
2 years ago
Considering that males can have Klinefelter (XXY) syndrome, XYY, and normal XY chromosomal combinations, and females can have Tu
mestny [16]

Answer:

C) maleness results from the minimal presence of one Y chromosome

Explanation:

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6 0
3 years ago
What types of local winds would you experiemce if you were standing in a valley at night
Neporo4naja [7]
Hey there,

Your question states: <span>What types of local winds would you experience if you were standing in a valley at night?

</span><span>The type of local winds would you experience if you were standing in a valley at night would be like a </span>\boxed{valley \ breeze}. Based on my research, when attending the valley of any sort, you would not really see like 10 MPH winds, there winds are not powerful at all. They are little breeze that feel good. That it why your answer is Breeze :)

~Jurgen
4 0
3 years ago
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