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Sophie [7]
3 years ago
8

Which of the following is an example of specific immunity?

Biology
1 answer:
zvonat [6]3 years ago
4 0

Answer:

Immunity to Small Pox

Explanation:

Over the years, Europeans had built up an immunity to smallpox because many had contracted the disease and still survived. As the population grew children were born with some immunity to the disease. When the Europeans arrived in the Americas, and smallpox spread around the native peoples, the Europeans did not contract the disease because they were immune. However, since the natives were not immune, they slowly died of due just to the disease as well as some parts of the war between the europeans.

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Excitatory neurotransmitters influence the receiving neuron to _____, whereas inhibitory neurotransmitters influence the receivi
Viktor [21]

Excitatory neurotransmitters cause the neuron to fire, and Inhibitory neurotransmitters cause the neuron not to fire.

Impulses are the signals passed from one neuron to another on the action of a stimulus. The impulses passed can be electrical or chemical. Neurotransmitters are the chemical molecules that help in the transfer of impulses between two neurons.

Chemicals like epinephrine, norepinephrine, and glutamate when released from the synaptic cleft of one neuron activate the receptors of other neurons, thereby initiating the other neuron to fire. These chemicals are called excitatory neurotransmitters.

Chemicals like GABA and glycine, when released from the synaptic cleft of one neuron do not activate the receptors of other neurons and hence the neurons will not fire the impulse. These chemicals are called inhibitory neurotransmitters.

To know more about neurotransmitters, visit

brainly.com/question/26387085

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8 0
1 year ago
A body of underground water, usually comprised of water saturated regolith, is permeable, and replenishes lakes and streams, is
Illusion [34]

A body of underground water, usually comprised of water saturated regolith, is permeable, and replenishes lakes and streams, is known as a aquifer.

Groundwater to be able to get into a rock with good porosity it must also have good permeability. For a rock to be permeable and for water to move through it, the pore spaces between the grains in the rock must be connected. Permeability is therefore a measure of the ability of water to move through a rock.

An aquifer is a body of rock and/or sediment that holds groundwater. Groundwater is the word used to describe precipitation that has infiltrated the soil beyond the surface and collected in empty spaces underground. There are two general types of aquifers confined and unconfined.

To learn more about Groundwater  , here

brainly.com/question/10005777

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3 0
2 years ago
HELPP FAST 20 POINTS AND BRAINLIEST ANSWER i need 2 answers tho
zhuklara [117]
I only have an answer for number 24, I'm sorry! But one piece of evidence is the DNA sequences, they have discovered that humans and monkeys/apes share a common ancestor through DNA. Another would be fossils, scientists have fossils to show great similarities in the skull and jaw structure, along with the legs, comparing to humans.
6 0
3 years ago
If the net force an object at rest is zero the object will remain at rest. <br> True or false
FromTheMoon [43]

True

Explanation:

If the net force on an object at rest is zero, the object will remain at rest. This is one of the postulates of newton's law of motion.

 Newton's first law of motion states that "an object will continue in its state of rest or uniform motion unless if it is acted upon by an external force. "

  • If no net force acts on a body, it will forever remain at rest.
  • The force on a body causes its motion and acceleration.
  • A body will continue in uniform motion if no external force acts on it.

Learn more:

Newton's law brainly.com/question/11411375

#learnwithBrainly

4 0
3 years ago
Matching Responses and Stimuli
lora16 [44]

Answer:

smelling rotten eggs - covering your nose

touching a hot dish - pulling your hand away

jumping into a cold pool - shivering

Explanation:

<u>A stimulus generally refers to a detectable change in the environment of an organism. These changes could be physical or chemical and could be in the internal or external environment of organisms. </u>

Organisms react to changes in their internal or external environment by responding appropriately. Hence perceiving the smell of rotten egg, feeling the hotness of a dish by touching it, and feeling cold immediately one jumps into a cold pool are all examples of stimuli and their corresponding responses would be covering one's nose, pulling the hand away, and shivering of the body in order to counter the cold.

In other words:

<em>smelling rotten eggs - covering your nose</em>

<em>touching a hot dish - pulling your hand away</em>

<em>jumping into a cold pool - shivering</em>

5 0
3 years ago
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