Q: Q: What science is the study of the occurrence, distribution, and determinants of health and disease in a population? Read this paragraph and choose the correct option from the provided answers: Epidemiologist Epidemiology is the study of the occurrence, distribution, and determinants of health and disease in a population. It is, therefore, related to public health. An epidemiologist studies the frequency and distribution of diseases within human populations and environments. Epidemiologists collect data about a particular disease and track its spread to identify the original mode of transmission. They sometimes work in close collaboration with historians to try to understand the way a disease evolved geographically and over time, tracking the natural history of pathogens. They gather information from clinical records, patient interviews, and any other available means. That information is used to develop strategies and design public health policies to reduce the incidence of a disease or to prevent its spread. Epidemiologists also conduct rapid investigations in case of an outbreak to recommend immediate measures to control it. Epidemiologists typically have a graduate-level education. An epidemiologist often has a bachelor's degree in some field and a master's degree in public health (MPH). Many epidemiologists are also physicians (and have an MD) or they have a PhD in an associated field, such as biology or epidemiology. Choices: - physiology - toxicology - histology - epidemiology A:
A: epidemiology

Q: Q: What basic cell structure is made up of a phospholipid bilayer and two layers of phospholipid molecules? Read this paragraph and choose the correct option from the provided answers: The cell membrane is made up of a phospholipid bilayer, two layers of phospholipid molecules. Notice the polar head group of the phospholipid is attached to the phosphate, and the tails are two fatty acid chains. The head group and tails are attached by a glycerol backbone. Choices: - cell cartilage - nucleus - mitochondria - cell membrane A:
A: cell membrane

Q: Q: Elements are defined by their atomic number, a number that describes the amount of what in the element? Read this paragraph and choose the correct option from the provided answers: Rutherford's nuclear model of the atom helped explain why atoms of different elements exhibit different chemical behavior. The identity of an element is defined by itsatomic number (Z), the number of protons in the nucleus of an atom of the element. The atomic number is therefore different for each element. The known elements are arranged in order of increasing Z in the periodic table (Figure 1.24 "The Periodic Table Showing the Elements in Order of Increasing "; also see Chapter 32 "Appendix H: Periodic Table of Elements"),. Choices: - bonds - electrons - neutrons - protons A:
A: protons

Q: Q: The amniotic sac is attached to what? Read this paragraph and choose the correct option from the provided answers: Attached to the placenta is the amniotic sac , an enclosed membrane that surrounds and protects the fetus (see Figure above ). It contains amniotic fluid, which consists of water and dissolved substances. The fluid allows the fetus to move freely until it grows to fill most of the available space. The fluid also cushions the fetus and helps protect it from injury. Choices: - Umbilical Cord - Stomach - uterus - placenta A:
A: placenta