Unit 9: The Human Body system Review

Which of the following correctly pairs the organ with its function?

• Sperm ⇒ produces testosterone

• 1. Ovary ⇒ produces egg cells

• 1. Pituitary gland ⇒ regulates sperm production

• Fallopian tube ⇒ produces estrogen

Which of the following is most likely to occur during the second trimester of pregnancy?

• Fat is deposited under the skin

• The amniotic sac and placenta form

• Cartilage grows where bones will form later

• 1. Tissues & organs develop & begin to function

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Which of the following will occur if an ovum is fertilized?

• 1. pregnancy

• mensuration

• estrogen

• puberty

correctly identify the frontal lobe and the occipital lobe of the brain on the diagram

What might cause an increase in blood volume?

• Blood Pressure

• Hypotension

• Resistance

• Hydration

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Correctly identify the Cerebellum and temporal lobe

Which of the following best describes a connection between blood flow and age?

• 1. As people age, their blood vessels become more elastic leading to lower blood pressure.

• 1. As people age, the heart becomes more efficient with each pump, increasing blood pressure.

• 1. As people age, blood pressure decreases leading to more cardiovascular disease.

• As people age, plaque build up in the arteries increases resistance, which  increases blood pressure.

Typhoid fever, a disease that causes headaches, digestive upset, and a high fever, is caused by the bacterium Salmonella typhi. Typhoid can be spread from person to person by contaminated food, water, or a lack of cleanliness. Since the 19th century, the number of individuals infected with this disease has decreased.  Which statement below best explains the reason for the decrease?

• 1. Scientists have corrected the genes damaged by disease-causing bacteria. 

• Public health officials have placed more restrictions on the use of toxins that cause disease.

• 1. Improvements in nutrition have led to less infections. 

• 1. Personal hygiene habits, such as handwashing, have reduced bacterial contamination.

The diagram show some changes that took place in a bacterial population recently exposed to an antibiotic.

Which statement best explains the presence of bacteria on day 4?

• Over time, the antibiotic became less effective.

• Bacterial populations cannot survive exposure to antibiotics.

• Some bacterial cells from day 1 were resistant to this antibiotic.

• Some of the bacterials cells developed proteins that enabled them to survive exposure to the antibiotic.

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In the 1880s, Louis Pasteur developed a method of weakening viruses.  The weakened viruses could be injected into healthy individuals.  How is this method effective in fighting viral diseases?

• The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle.

• The immune system develops antibodies in response to the weakened viruses.

• The rate of genetic mutation in the host is decreased due to the introduction of weakened viruses.

• Weakened viruses are unable to enter the host organism.