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netineya [11]
3 years ago
13

What's portal of entry?

Biology
1 answer:
erik [133]3 years ago
6 0
A portal of entry<span> is the site through which micro-organisms enter the susceptible host and cause disease/infection. Infectious agents enter the body through various </span>portals<span>, including the mucous membranes, the skin, the respiratory and the gastrointestinal tracts.</span>
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9. Which of the following is the example of the action of the autonomous nervous system? A. Kicking a ball B. Swinging of arms C
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Movement of food in the small intestine. Thus, option "D" is correct.

<h3>What is the autonomous nervous system? </h3>

ANS is divided in two opposite systems: sympathetic and parasympathetic:

Parasympathetic nervous system: characterized by the tag "rest and digest" it decreases the heart rate, blood pressure, and breath. It increases the gastrointestinal motricity, letting the organism resting (this happen after a meal).

Sympathetic nervous system: characterized by the tag "fight or flight" it increases the heart rate, blood pressure, and breath. It decreases gastrointestinal motricity, letting the organism focus on its environment (this happen when we are in danger).

Thus, option "D" is correct.

To learn more about autonomous nervous system follow the link:

brainly.com/question/1034520

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According to the fossil record, how long did the transition from fully terrestrial to fully aquatic whales take?
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