Unit 9 Microorganisms and Body Systems
Quiz by Dana Sparks
High School - Biology
Science (2010)
Texas Essential Knowledge and Skills (TEKS)
Feel free to use or edit a copy
includes Teacher and Student dashboards
Measure skillsfrom any curriculum
Measure skills
from any curriculum
Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.
With a free account, teachers can
- edit the questions
- save a copy for later
- start a class game
- automatically assign follow-up activities based on students’ scores
- assign as homework
- share a link with colleagues
- print as a bubble sheet
26 questions
Show answers
- Q1A student sets up a compost bin outdoors. Inside the bin microorganisms convert the student’s vegetable and paper scraps into rich fertilizer. Which of the following best describes the role that these microorganisms play in natural habitats?The microorganisms turn solar energy into sugars.The microorganisms help keep nutrients cycling through the ecosystem.The microorganisms help balance the numbers of producers and consumers.The microorganisms function as autotrophs.60s
- Q2A student researching bacteria concluded a report with the following claim: "All bacteria disrupt the health of organisms they inhabit, including humans." Which statement correctly addresses the validity (correctness) of the claim?The claim is invalid because there are many types of bacteria that help organisms maintain homeostasis.The claim is valid because many studies and experiments have shown that bacteria disrupt homeostasis.The claim is invalid because only microorganisms such as viruses disrupt the health of organisms.The claim is valid because bacteria cause disease.60s
- Q3The human digestive system is approximately 900 cm long. Food is moved through the digestive tract primarily by —hydrochloric acid in the stomachthe enzymes amylase and pepsinbile produced by the pancreasmuscular contractions60s
- Q4Toxoplasmosis is an infection producing brain lesions. Mice with their gonads (reproductive organs) removed are more resistant to T. gondii and develop very few lesions on their brain tissue. Which systems most likely interact and cause the severity of infections to vary?Excretory and respiratoryNervous and integumentaryImmune and endocrineMuscular and skeletal60s
- Q5When the level of carbon dioxide in the blood is too high, the excess carbon dioxide reacts with water and produces carbonic acid. The carbonic acid causes the blood pH to become more acidic. When the blood pH becomes too acidic, chemoreceptors in the brain instruct the body to react and maintain homeostasis in blood pH. Which of these responses by the body would eliminate the excess carbon dioxide and help maintain homeostasis in blood pH?Increasing the body temperature by shiveringDecreasing the heart rateBreathing more deeply and frequentlyIncreasing glucose levels in the blood60s
- Q6Scientists studying illnesses caused by chemically contaminated food conduct research to minimize the effects of these diseases on society. These chemicals harm the body through interactions between the digestive system and the immune system. Scientists conducting this research are likely to describe which of these interactions between the digestive and immune systems?he immune system transforms the chemicals in the contaminated foods into harmless chemicals. These harmless chemicals are then broken down by the digestive system.When contaminated foods are eaten, the immune system prevents the chemicals from entering the digestive system.Chemicals enter the immune system through a break in the skin. The chemical contamination is then passed to the digestive system by the circulatory system.Chemicals enter the digestive system through contaminated foods. Once in the body, the chemical contaminants impair the body’s ability to fight off infectious diseases.60s
- Q7Which of the following is an example of the endocrine system directly interacting with the nervous system?The brain sends signals that control the speed at which food moves through the intestines.The vertebrae protect the spinal cord from injury.Hormones provide feedback that affects neural processing.Hormones provide feedback that affects neural (nerve) processing60s
- Q8The female reproductive and endocrine systems work interactively for which main purpose?To release neurotransmitters during times of stressTo maintain homeostasis by removing waste products from the bodyTo control hormone levels to prepare the body for pregnancyTo exchange gases to support cellular aerobic respiration60s
- Q9A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?The virus damages immune cells while using their machinery to produce copies of itself.The virus produces toxins that weaken immune cells and prevent them from reproducing.The virus damages immune cells while using their machinery to produce copies of itself.The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.60s
- Q10The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These CD4 T cells are one of many kinds of white blood cells that are an important part of the immune system. The most common danger related to the destruction of CD4 T cells is —a decrease in the amount of oxygen being transported to tissuesan increase in the threat of diseases caused by microorganisms and virusesa decrease in the flow of blood to vital organsan increase in the risk of high blood pressure60s
- Q11Saprophytes are fungi that feed on dead and decomposing organisms. They secrete enzymes that digest components of cell walls, such as cellulose and lignin. Which statement explains why these fungi are an important part of the biogeochemical cycle?Saprophytes extract minerals from living tissue to recycle them back into the soil.Saprophytes return organic material to the soil for use by living organisms.Saprophytes perform gas exchange that assists the cellular activities of autotrophs.Saprophytes transport nutrients through the xylem and phloem in autotrophs.60s
- Q12What two human systems work together to provide body cells with a constant supply of oxygen while removing carbon dioxide waste products?Respiratory and circulatoryExcretory and integumentaryMuscular and skeletalNervous and endocrine60s
- Q13Kidneys are part of the excretory system in a human body. They purify the impure blood and send it back to the rest of the body. Which system is mainly responsible for the transport of plasma to the kidneys?Muscular systemCirculatory systemRespiratory systemNervous system60s
- Q14How do the circulatory system and immune system work together to respond to an injury?Increased blood flow carries white blood cells to the site of the injury.Increased blood flow allows for an increase in the exchange of O2 and CO2 at the site of the injury.Increased blood flow kills healthy cells which prevents infection at the site of the injury.Increased blood flow removes infected cells from the body at the site of the injury.60s
- Q15The 1918 influenza epidemic killed between 50 million and 100 million people worldwide. This epidemic happened near the end of World War I. More people died from the influenza epidemic than were killed in the war. Which of the following explains why this virus was so deadly worldwide?Food was scarce because of the war, so people were undernourished, and their immune systems were weakened.All of the answersInfected soldiers returning from the war spread the virus when they coughed.Medical personnel often became ill as a result of exposure to airborne virus particles.60s