L'teesha's grandmother has atherosclerosis, a circulatory disease that occurs when plaque builds up on the walls of arteries. How would this disease affect the blood flow?

• There will be reduced blood flow requiring the heart to work harder to move blood through the body.

• There will be increased blood flow allowing the heart to pump less frequently and with less pressure.

• Plaques are harmless, and they will have no effect on the blood flow.

• There will be an increased exchange of gasses, nutrients, and wastes.

The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?

• A high viscosity of blood causes an increased resistance in the blood vessels and leads to decreased blood flow

• The changing of the shape of red blood cells to a crescent shape decreases resistance and lead to increased blood flow.

• The narrowing of blood vessels increases pressure and leads to increased blood flow.

• A low blood pH decreases the rate of diffusion through the blood vessels and leads to decreased blood flow.

Which of the following statements explains a way in which lifestyle choices may affect blood flow?

• Smoking can constrict blood vessels, reducing circulating to the hand and feet.

• Eating foods high in cholesterol may lead to a build-up of plaque in the blood vessels, causing a thinner passage for blood, causing less blood flow to the heart.

• Exercising forces the heart to work harder to circulate blood. After many years of exercise the heart may become more efficient and have a larger stroke volume, increasing the blood flow to the muscles.

• All of these are examples of lifestyle choices.

What is immunity?

• The body's ability to produce cells that inactivate foreign cells or substances.

• The body's ability to regulate homeostasis through feedback loops.

• The body's ability to produce the "fight or flight" response.

• The body's ability to use the endocrine system to fight disease.

Tags

NGSS.HS-LS1-3

After an initial infection, B-cells recognize the measles virus. how is this helpful in human immune response? 

• The B-cells use this recognition to defend the body against other pathogens, such as bacteria.

• The B-cells more quickly recognize and respond to any other virus that invades the body.

• The B-cells produce antibodies more quickly if the measles virus is encountered again.

• The B-cells transfer this recognition to T-cells, which will then devour the viruses.

A patient presents with sickle cell anemia which causes blood cells to become crescent moon shaped and easily clump together and form clots. How would sickle cell anemia affect blood flow?

• Decrease blood flow

• Increase blood flow

• It really has no effect

• Sometimes it increases flow and sometimes decreases flow

Which of the following factors would most directly affect blood flow through the circulatory system?

• blood sugar

• blood pressure

• respiratory rate

• outside temperature

Tags

NGSS.HS-LS1-3

Which letter is pointing to the parietal lobe of the cerebrum?

• A

• B

• C

• D

• E

Which letter is pointing to the cerebellum?

• B

• C

• D

• E

• F

Which letter is pointing to the part of brain that is responsible for breathing, swallowing, body temperature, etc?

• B

• C

• D

• E

• F