1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
iren2701 [21]
3 years ago
15

When a drug enters the body via oral ingestion, smoking, snorting, or injection, the chemicals move through the bloodstream and

must cross what barrier to produce an effect?
Biology
1 answer:
Anna007 [38]3 years ago
5 0

Answer:

Blood Brain Barrier(BBB)

Explanation:

This is a biological interface of special endothelial cells of astrocytes, pericytes , capillaries,  neurons and other  structures, acting as a physical barrier or  gate separating the Central Nervous system from the peripheral  blood circulations. Thus it  formed a tight junction serving as a  physical barrier to  selectively regulate the entrance of substances from the   cerebral blood flow   into the brain,  therefore maintaining homeostasis of the brain.

From above any  substances  absorbed into the blood stream  irrespective of the mode of entry  are transported through  the BBB, and  are selectively  regulated to enter the brain cells by the BBB's   interactions with the blood vessels, hormones etc.

Basically it allows the passage of nutrients,  a few  drug, hormones and resists certain toxins and pathogens for the brain homeostasis.

You might be interested in
Some leaves modify into spines, how does this modification help plants survive?
barxatty [35]
Spines primarily have a protective function in plants. The spines can be sharp, and form a physical barrier against herbivores which may want to feed on the plant. Spines however also have other benefits. The spines on a jumping cactus allow segments of the cactus to stick to passing large animals or humans, thereby allowing the cactus to spread to other areas through asexual propagation. Spines are modified leaves, and spines have a much lower surface area than leaves, and therefore can reduce transpirative loss of water by the plant during harsh droughts. Some trees in alpine regions, such as pine trees, have developed spine-like leaves to prevent the accumulation of snow in the branches.  
7 0
3 years ago
Which biomolecules does your body use as a long term energy source?
lord [1]

carbohydrates

they are like fat but they are used in your body and hold water whitch makse people look bloted  

8 0
3 years ago
What are the possible effects of contaminated water on the health of an individual or community? Explain your answer in terms of
Harman [31]
The health effects of drinking contaminated water can range from no physical impact to severe illness or even death. Some of the effects of drinking contaminated water can be immediate, or not noticed for many years. These include gastrointestinal and stomach illnesses like: nausea.
6 0
3 years ago
Analyze how different concentrations of solutes in a solution can affect organism's cells. In your own words 150 word count, pls
lions [1.4K]

Answer:

In creature cells, if an answer that the cell is in has an equivalent measure of solute as within the cell does, the cell will continue as before size. On the off chance that there is more solute outside of the creature cell, the cell will recoil in light of the fact that the water will tail it out of the cell hypertonic arrangement. On the off chance that there is less solute outside of the creature cell, the cell will develop in light of the fact that the water will take after the more prominent solute within the cell hypotonic arrangement.

Explanation:

5 0
2 years ago
Read 2 more answers
Hypothesize one way that a diploid organism could have offspring that are 3n or 4n
gladu [14]
Diploid refers to a cell that has two copies of each chromosome. One way that a diploid organism could have an offspring that are 3n (triploid) or 4n is when the chromosomes don't separate during meiosis.

Triploid refers to some cell that have 3 copies of each chromosomes for a total of 69 chromosomes.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Only adult ticks of the genus Ixodes may feed on humansa. True b. False
    7·1 answer
  • Plz help ASAP!!!!!!!!!
    7·2 answers
  • What occurs during absorption
    5·2 answers
  • What is Precambrian time? the span of time from Earth’s formation to the start of the Cambrian period the span of time between t
    8·1 answer
  • What is the process that assembles the amino acids to form a protein called?
    13·1 answer
  • The meaning of CBC is
    14·1 answer
  • Which of the following is considered a modified stem?
    11·1 answer
  • Imagine a deer that lives in a meadow. When the deer dies what happens to its remains?
    10·2 answers
  • Please select the word from the list that best fits the definition
    15·1 answer
  • Why would a rough, steep mountain habitat have a higher rate of speciation
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!