Biology Review: Key Concepts and Answers
Posted on Feb 20, 2025 in Biology
- Vaccines are used to introduce weakened or dead pathogens to stimulate the: immune system to react and be ready to fight future invasions by these microbes
- Which structure is closed or blocked to prevent sperm from traveling from the testes to the urethra in a vasectomy? A
- Sweat and skin secretion kill or limit the growth of many types of microbes. This control of microbes is an example of: a non-specific immune response against infection
- The fluid-filled structures in which the embryo is protected during pregnancy are called the: amniotic sac
- Pathogens that cause an opportunistic infection: rarely overcome a healthy immune system
- Which event can result in the birth of fraternal twins? Penetration of two eggs by two sperm
- Antigens are protein markers that are important because they help the immune system: recognize foreign cells
- Gametogenesis occurs within structures: E and G
- Cellular immunity and humoral immunity are similar because they both: produce acquired immunity
- The diagram shown represents the human heart, and the direction of blood flow is indicated by arrows. The last chamber that blood passes through before exiting the heart to circulate around the body is: 2
- Which of the following does not constitute a barrier part of the body’s first line of defense? B-cells that produce antibodies
- Diabetics often have increased levels of sugar in their blood. Which of the following most relates to some issue diabetic patients may have affecting blood flow? Increased blood viscosity
- In the disease atherosclerosis, a sticky material called plaque collects on the walls of arteries. How would this disease affect blood pressure and blood flow? It would increase blood pressure and decrease blood flow
- Pollen grains often stimulate an allergic response that produces: antibodies
- Which of the structures represents an arteriole? B
- Which event occurs during the second trimester of pregnancy? Brain grows rapidly
- Which structure contains blood with the highest oxygen concentration? 2
- Individuals with HIV sometimes contract a rare pneumonia infection that usually does not affect the rest of the population. What causes this rare infection in people with HIV? They are unable to fight off these pneumonia-causing organisms
- What is the most likely effect of a blood flow through the cardiovascular system? A blood clot will block blood flow, preventing oxygen from reaching tissue in a certain area
- What is occurring at D? Ovulation
- How do human diseases caused by bacteria and diseases caused by viruses react to antibiotics? Bacterial diseases respond to antibiotics; viral diseases do not
- Hominid evolution trends include larger brain size, smaller jaw, and advancement in communication and tools. The development of structures number 1 lead to an increase in logical thinking and reasoning. What part of the brain is labeled number 1? Frontal lobe
- The diagram below represents one possible immune response that can occur in the human body: specific immunity
- Which part of the brain would be responsible for feeling pain and pressure? 1
- Which letter indicates a structure formed from both maternal and embryonic tissues? A
