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sashaice [31]
2 years ago
10

Juan picks up a steel utensil and immediately drops it because it’s extremely hot. How does the reflex arc work to protect Juan

from a worse burn?
In a reflex arc, the 1.)____ neuron carries the action potential from the 2.)____ .
1.)
- Motor
- Relay
- Sensory
2.)
- Brain to the spinal cord
- Sense organ to the brain
- Spinal cord to the muscle
Biology
2 answers:
ololo11 [35]2 years ago
8 0

Answer:

The correct answer will be option-

1. Motor neuron

2. Spinal cord to muscle

Explanation:

The reflex arc is the mechanism which controls the immediate response to the stimulus called reflex action.

In a reflex arc, the main components involved are the receptors, sensory neurons, motor neurons, muscles and spinal cord.

The sensory neurons transmit the signals from the sense organ to the spinal cord where it analyses the situation and transmits the action potential back to the muscle via motor neuron.

Thus, the selected options are correct.

GenaCL600 [577]2 years ago
4 0

Answer:

1. Motor, 2. spinal cord to muscle

Explanation:

motor neurons are the second part of a reflex arc that actually causes the movement associated with the reflex arc.

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A Chlorella cell viewed through a microscope is 0.00005 m wide when the magnification is 2000.
juin [17]

Answer:

0.0025micrometer.

Explanation:

To calculate the actual size of the image, the formula to be used is

Actual size=Image size÷magnification.

The image size is 0.00005 wide

Magnification is 2000

First, convert the image size to micrometer.

=0.00005 × 1000000

50micrometers.

Actual size= 50÷2000

Actual size = 0.0025

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1 year ago
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stira [4]

The answer would be A. Models

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2 years ago
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7 0
2 years ago
Define groundwater, and list some anthropogenic (human) sources of groundwater pollution. Why do many scientists consider ground
joja [24]

Explanation:

Groundwater is the freshwater present below the earth's surface. It originates from the rain, ice, melting snow.

Some anthropogenic sources of groundwater pollution are

  • Aluminum.
  • Sulfur.
  • Arsenic.
  • Nitrates.
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Groundwater pollution has more problems than surface water pollution because groundwater is mostly hidden and it is very difficult to view, manage and monitor.

Groundwater holds its contamination and pollutants that cause pollution whereas surface water rinses their contamination and pollutants.

8 0
2 years ago
Researchers believe that in a fish species, individuals with the recessive genotype aa are predisposed to disease. Homozygous do
Nataly_w [17]

Answer:

The homozygous dominant phenotype is higher than expected, indicating that evolution has occurred.

Explanation:

At the start there are 200 fishes in the pond, 100 of them are AA(50%) and 100 of them are aa(50%). Using the Hardy-Weinberg Equilibrium equation we can say that the gene frequency is

A=0.5

a=0.5

With those frequency, the expected percentage of offspring with dominant genotype will be:

AA= 0.5 * 0.5 = 0.25 = 25%

The number of homozygous dominant found is 35% which is higher than expected  (25%). Higher homozygous dominant frequency than expected means the Hardy-Weinberg Equilibrium is changed. In this case, evolution probably the cause that shifts the gene frequency.

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2 years ago
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