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n200080 [17]
3 years ago
14

Explain how chemicals present in cigarette smoke are able to enter the body and reach the brain

Biology
1 answer:
kobusy [5.1K]3 years ago
4 0

When you smoke a cigarette, the components; e.g. nicotine and carbon monoxide enter the lungs and are absorbed into the bloodstream. They are carried by the Red Blood Cells to the blood-brain barrier, here, nicotine binds to nicotinic acetylcholine receptors (nAChRs), resulting to a cascade that results to release of dopamine (good-feeling neurotransmitter).






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What is the movement of molecules across a barrier such as the semi-permeable cell membrane called
PolarNik [594]

Answer:

DIFFUSION

Explanation:

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

3 0
3 years ago
Describe in a few sentences each the following eating disorders: anorexia, bulimia, binge eating, bigorexia, and exercise compul
ad-work [718]

Answer:

Anorexia : Condition which occurs due to very low weight of body due to the fear of gaining weight.

Bulimia: Bulimia nervosa can be described as a condition in which there is binge eating by the person first which is followed up by purging.

Bigorexia: Bigorexia can easily be described as the reverse of anorexia.

Drunkorexia: A condition in which there is binge or purge eating due to the intake of alcohol.

Exercise compulsion : A condition in which a person does excessive exercise.

Binge eating: It is a condition in which a person does excessive over eating without feeling the need to stop.

Explanation:

Anorexia: Anorexia Nervosa, which is also termed as anorexia, can be a psychological disorder in which the person becomes life threatening from the fear of getting fat. As a result, they get an extremely low body weight.

Bulimia: Bulimia, also termed as Bulimia Nervosa, is a condition in which a person does over eating i.e binge of an eating first and then tries to compensate it with any kind of purging activity. The purging activity could be any activity which he tries to do so that he can get rid of the excessive food taken.

Bigorexia: Bigorexia, also termed as Muscle Dysmorphia, is a condition in which the person thinks that he/she is very skinny or under weight when in real he/she is normal or usually over weight.

Drunkorexia : Drunkorexia is a condition in which a person has abnormal eating patterns trying to compensate for the large amount of alcohol that he/she has consumed.

Exercise compulsion : Exercise compulsion is a disorder in which a person focuses only on exercising ignoring the daily activities or any injuries that he/she might have acquired.

6 0
3 years ago
Read 2 more answers
Which of the following is an ethical concern regarding the biotechnology of stem
RideAnS [48]

Answer:

Other important ethical issues relate to informed consent of both donors of gametes and embryos as well as recipients of stem cells and stem cell products. Further, there has been some concern related to the commercialization of the process, justice, and the responsible conduct of research.

Explanation:

8 0
3 years ago
Pulse-chase experiments and protein location
ExtremeBDS [4]

Answer:

The correct answer is option - phagocytosis.

Explanation:

The explained experiment is the pulse-chase experiment in this the cells that are involved are macrophages. Macrophages are the immunity cells that have a large number of the lysosomes for killing the pathogens enters in the cell brought into the cell through the process of phagocytosis.

Phagocytosis takes place with the help of the enzyme called hydrolytic enzyme that is synthesized in the endoplasmic reticulum and modified by Golgi and moves to the lysosome.

Thus, the correct answer is option - phagocytosis.

5 0
3 years ago
Which step occurs first in sexual reproduction
nikdorinn [45]

Answer:

In the first stage of sexual reproduction, "meiosis", the number of chromosomes is reduced from a diploid number (2n) to a haploid number (n). During "fertilisation", haploid gametes come together to form a diploid zygote, and the original number of chromosomes is rest

Explanation:

3 0
3 years ago
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