The net force on the ball = Force+ frictional force
=22.8-2.3 = 20.5N
After a quick check, I can confirm that all of the answers stated in the question are correct.
As per questions one and two, Oxygen is drawn from the air by the lungs, a part of the respiratory system. The pulmonary veins then carry the oxygenated blood to the heart (these are the only veins to carry oxygenated blood), which is then pumped throughout the body through arteries. The path followed by the oxygen is:
- Oxygen is drawn into the lungs
- The Pulmonary artery takes blood to the lungs
- Hematosis occurs, transferring the oxygen to the blood
- The pulmonary veins take the oxygenated blood to the heart
- The aorta artery and its ramifications distribute the oxygenated blood throughout the body
In order to increase the amount of oxygen in times of greater need such as when exercising, the heart rate (pulse) and breathing rate increase to provide more oxygen, when an artery is blocked such is the case with Atherosclerosis, blood flow is reduced. Questions 3 and 4 are correct.
Lastly, a person's small intestine is lined with highly specialized cells whose function is to absorb the nutrients from the food we ingest. Damage to this lining would cause this organ to not be able to obtain the vitamins and nutrients needed for the human body. All answers are correct.
To learn more visit:
brainly.com/question/10475117?referrer=searchResults
Answer: give yourself time to grief.
Dont be scared to cry
return to your normal self as soon as possible.
accept help from others
love all of yourself
accept all of your feelings and negativities.
Explanation:
Answer:
Chains of amino acids make Proteins which fold to make a complex three dimensional shape.
Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time. Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation. Often cells can recognize any potentially mutation-causing damage and repair it before it becomes a fixed mutation.
Mutations contribute to genetic variation within species. Mutations can also be inherited, particularly if they have a positive effect. For example, the disorder sickle cell anaemia is caused by a mutation in the gene that instructs the building of a protein called hemoglobin. This causes the red blood cells to become an abnormal, rigid, sickle shape. However, in African populations, having this mutation also protects against malaria.
However, mutation can also disrupt normal gene activity and cause diseases, like cancer. Cancer is the most common human genetic disease; it is caused by mutations occurring in a number of growth-controlling genes. Sometimes faulty, cancer-causing genes can exist from birth, increasing a person’s chance of getting cancer.
