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sukhopar [10]
2 years ago
11

Which of the following is true about a spinal reflex

Biology
1 answer:
Nadya [2.5K]2 years ago
5 0
<span> A. It is controlled by the brain. B. It is an involuntary response to a stimulus. C. It is a voluntary contraction of muscles. D. It increases blood flow to muscles.
</span>
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In the process of digestion, proteins are broken down into _______, while carbohydrates are broken down into ____
Ann [662]
Proteins are broken down into amino acids, while carbohydrates are broken down into sugars.
5 0
3 years ago
Which type of epithelium lines the inferior portions of the pharynx?
konstantin123 [22]

Answer:

The type of epithelium that lines the inferior portions of the pharynx is stratified squamous epithelium.

Explanation:

The pharynx is a structure made up of muscles and mucous membranes -like many internal organs- that is part of the respiratory system and is an intermediate step in the digestive tract.

This structure has two portions:

  • <em>Upper or nasopharynx </em>
  • <em>Lower, or oropharynx, in contact with the airways. </em>

Some even propose that the borderline surface between the pharynx and larynx can be called the laryngopharynx, due to its tissue structure.

The lower portion of the pharynx is covered by a squamous stratified epithelium, the inner layers of which rest on a basal lamina. The more superficial layers provide protection to the interior of the pharynx against friction, in addition to remaining lubricated by mucous secretion at that level.

Learn more:

Lower portion of the pharynx brainly.com/question/7300121

7 0
3 years ago
Calculate the population growth rates for the different population sizes shown below. Enter your values rounded to the nearest w
son4ous [18]

Population growth is a change in population at any time and can be calculated as a change in the number of individuals in a population using "per unit time" for measurement.

<h2>Further Explanation </h2>

The term population growth refers to all species, but always refers to humans, and is often used informally as a demographic designation of the value of population increase, and is used to refer to world population growth. Population growth itself is influenced by factors of birth, death, and migration. In demographics, there is a term increase in a natural population and an increase in the total population. Where natural population growth is only influenced by births and deaths, while total population growth is affected by births, deaths, in-migration, and out-migration (emigration).

Back to the population growth rate. The rate of population growth each year in a certain period is called the population growth rate expressed in percentage units (%). This population growth rate also reflects the rate of population growth of an area every year. The higher population growth rate indicates a faster rate of population growth. Conversely, if a low population growth rate shows a slow population growth rate.

When population growth can exceed the loading capacity of an area or environment, the results end with overpopulation. Disruptions in human populations can cause problems such as pollution and traffic congestion, even though they can be covered by technological and economic changes. This region can be considered "underpopulated" if the population is not large enough to manage the economic system.

Growth value = (end population period - initial period population) / initial population period

Growth ratio = Growth value X 100%

Learn more

population growth brainly.com/question/3412355

Details

Grade:  High School

Subject:  Biology

keywords: population, growth.

6 0
3 years ago
describe in detail the seven biomes of the world using: climate, temperature ranges, land structures, where in the world they ar
Gemiola [76]

Answer:

this is your answer

8 0
3 years ago
Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the
Leviafan [203]

The right answer is vein (it contains blood and has valves).

The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.

3 0
3 years ago
Read 2 more answers
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