Dopamine is a neurotransmitter and it is responsible for transmitting signals between the nervous cells of the brain.
Answer:
Hemoglobin has a critical role in the body, as it is the protein in red blood cells (RBCs) that carries oxygen from the lungs to the tissues of the body. As such, abnormal levels of hemoglobin, or abnormal types of hemoglobin can result in serious disease. Let's look at the normal ranges of hemoglobin in adults in children, conditions that cause either a low hemoglobin or a high hemoglobin level, and the tests for and significance of hereditary abnormal hemoglobins
Structure
Hemoglobin is protein in red blood cells that is made up of four chains. Each of these chains contains a compound known as heme, which in turn contains iron, which is what transports oxygen in the bloodstream.
Hemoglobin is responsible for the shape of red blood cells, which usually appear like donuts but with a thin center rather than a hole. In conditions in which hemoglobin is abnormal, such as sickle cell anemia, the consequent abnormal shape of the red blood cells can lead to problems.
The pigment in hemoglobin is responsible for the red color of blood.
Function
Hemoglobin functions by binding and transporting oxygen from the capillaries in the lungs to all of the tissues in the body. It also plays a role in the transport of carbon dioxide from the tissues of the body back to the lungs.
Nitric oxide and carbon monoxide are also able to bind with hemoglobin, with carbon monoxide binding much more readily than oxygen (the reason why carbon monoxide poisoning is so serious).
Chemical bonds are bonds that join atoms and hold them together enabling them to form different compunds and molecules. There are different types of bonds (single, double, triple, covalent) which form depending on the atoms that are being attracted and depending on their attraction.
An example can be the hydrogen bonds that form in water molecules joing hydrogen atoms to oxygen atoms, as shown in the image below.
Hope it helped,
BioTeacher101
Answer:
The likely cause is pathogenic bacteria.
Explanation:
The pathogenic bacteria are bacteria that cause food poisoning through the contamination of food by faeces. Examples include Salmonella typhi, E. coli, Clostridium botulinum e.t.c.
This means that they are contacted through faecal oral route.
<h3><u>Answer;</u></h3>
white eyes are homozygous recessive
<h3><u>Explanation</u>;</h3>
- <em><u>Thomas Hunt Morgan work with the fruit fly showed that genes are linked in a series on chromosomes and are responsible for identifiable, hereditary traits. </u></em>He was the first to identify that genes are linked to the same chromosome.
- <em><u>According to his hypothesis he stated that genes that are linked are arranged linearly on a chromosome, while those genes with low combination frequencies must be closer together and thus difficult to separate</u></em>.
- When a gene contains two similar alleles that is, either two dominant alleles or two recessive alleles then it is called homozygous dominant and homozygous recessive respectively. White eyes of a fruit fly is an example of homozygous recessive
