Unit 11 Review

The human mother’s body nourishes the growing embryo during pregnancy.  Which structure nourishes the embryo and removes wastes through a network of blood vessels? (SC.912.L.16.13)

• Ovary

• Placenta

• Uterus

• Zygote

The human immune system can produce a specific response or a nonspecific response to infection.  Which of the following is a specific immune response of the human immune system? (SC.912.L.14.52)

• Fever

• Inflammation

• Antigen Display

• Interferon Release

After an initial infection, B-cells recognize the measles virus.  How is this helpful in human immune response? (SC.912.L.14.52)

• 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 then devour the viruses

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 effects on blood flow? (SC.912.L.14.36)

• the narrowing of blood vessels increases pressure and leads to faster blood flow.

• high blood viscosity increases the resistance in the blood vessels and leads to slower blood flow.

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

• the changing of the shape of red blood cells to a crescent shape decreases resistance and leads to faster blood flow.

Although many types of bacteria are helpful and do not cause disease, nearly half of all human diseases are bacterial.  Better sanitation and the use of antibiotics over the last century have affected death rates from bacterial infections in which way? (SC.912.L.14.52 and  SC.912.L.14.6 and  HE.912.C.1.5)

• death rates have increased and then decreased

• death rates have decreased

• death rates have increased

• death rates have remained the same

YOU NEED TO KNOW THIS PICTURE.

• Yes

• Yes

• Yes

• Yes