Question 3(Multiple Choice Worth 5 points)(07.06 MC)
Which of the following best describes an example of a specific internal response to harmful bacteria?
Skin serves as a physical barrier that prevents bacteria from entering the body.
Saliva contains enzymes that destroy bacteria and prevent infection.
Bacterial infection causes the release of histamine, which leads to inflammation and swelling.
Antigens trigger the production of antibodies, which mark bacteria for destruction.

Answers

Answer 1
Answer:

Answer:

Antigens trigger the production of antibodies, which mark bacteria for destruction.

Explanation:

The question is talking about internal response to bacteria so we have to look at what happens inside the body pertaining to bacterial infection, so the answer is "Antigens trigger the production of antibodies, which mark bacteria for destruction".

Answer 2
Answer:

Answer:

A .....the skin is the bodies first line of defense

Explanation:

The first line of defence is non-specific and aims to stop microbes from entering the body. 


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If a physical or chemical change gives off heat energy, it isan endothermic process

a chemical process

an exothermic process

an energetic proces

Answers

The answer to the question stated above is the third option which is "an exothermic process".

>Exothermic is the giving off heat energy the  transfer of energy to the surroundings.

>In exothermic reaction, the energy is usually transferred as heat energy

The answer is exothermic.

With respect to acetylcholine, botox is to nicotine as _____ is to _____.

Answers

Answer:

antagonist to agonist

Explanation:

Glutamate has excitory effect on the nerve fibres in the central nervous system. It is mostly found in synaptic vesicle of nerves terminals in abundance and can be released through exocytosis. The glutamate has special transporters on the plasma membrane that allow it to be transported across neurons.

A drug increases the effect of the neurotransmitter is called an agonist. If it decreases the effect of the neurotransmitter it is called an antagonist. If the neurotransmitter is excitatory like glutamate above, nicotine presence will increase the excitatory effect, and presence of botox will decrease the excitatory effect by inhibit its diffusion across the neurone.

Describe the sequence of oxygen,carbon dioxide and blood flow in your own words

Answers

photosynthesis for co2 and o2. process!!

Give scientists clues about the kind of organisms that lived in an ancient environment

Answers

The answer is a fossil.

The fossil represents a preserved remain of an organism from the past and gives scientists clues about the kind of organisms that lived in an ancient environment.
Usually, hard tissue, such as bones and teeth or exoskeleton is much more preserved than soft tissue (organs, skin, etc.). Fossils become fossils by a process of mineralization. Hard tissues are more mineralized during life than organs. So it is no surprise that hard tissues take part in the process of mineralization and is preserved in fossils, unlike soft tissues

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Answers

It showed that species of every kind develop and evolve over time to change and become different. 

Variation of ecological habitats within a species is characteristic of which type of diversity?a.
Genetic diversity
b.
Ecosystem diversity
c.
Species diversity
d.
Regional diversity

Answers

The right answer for the question that is being asked and shown above is that: "B. Ecosystem diversity." Variation of ecological habitats within a species is characteristic of the type of diversity which is the Ecosystem diversity