Maggysamuel49

The P-wave of a normal EKG indicates - atrial depolarization Blood within the pulmonary veins returns to the - left atrium During the cardiac cycle the bicuspid valve closes - When the ventricle is in a systole Select the correct statement about the heart valves - The AV valves are supported by chordae tendinae so that they do not blow back up into the atria during the ventricular contraction Select the correct statement about Cardiac output - A slow heart rate increases end diastolic ...

what was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants - traits are inherited in discrete units, and are not the results of "blending." genetic information is carried in which of the following biomolecules - either DNA or RNA in which type of cell would a Barr body be observed - somatic cells of a woman if nondisjunction occurs in meiosis II during gametogenesis, what will be the result at the completion of meiosis - one gamete will be ...

A hematopoietic stem cell will give rise to - Erythrocytes, leukocytes, platelets (all of the above) These cells can enter the tissues as macrophages and are important to chronic infections - Monocytes Oxygen binds to the ___ portion of hemoglobin - Iron atom A patient with low iron levels would experience which of the following symptoms - An increase in fatigue Red blood cells are efficient oxygen transport cells. Of the following characteristics, which is the major contributor to th...

Which of the following is an example of a noncommunicable infectious disease A. infection with a respiratory virus B. food poisoning due to a preformed bacterial toxin in food C. skin infection acquired from a dog bite infection acquired from the stick of a contaminated needle - B. food poisoning due to a preformed bacterial toxin in food which of the following is a pathogen that could not be identified by the original Koch's postulates A. S. aureus B. P. aeruginosa C. HIV D. S. en...

Immunity - involves a specific defensive response when a host is invaded by foreign organisms the immune system recognizes foreign substances as not belonging to the body and responds. Antigen - is a substance that provokes an immune response. Immune response - may generate specialized lymphocytes or antibodies specific for the antigen. Acquired immunity - is the protection an organism develops during its lifetime. Active immunity - involves an immune response within the individual. P...

What types of enzymes are typically constitutively expressed? - enzymes in constant demand In an experiment exploring the expression of DNA repair enzymes, phage exposed to UV light had low infectivity, but when both phage and host cell E. coli were exposed to UV light, normal levels of infectivity resulted. From these data we can infer - host cell genes were used to repair phage DNA The lacZ gene was used in an experiment testing for the expression of gene X. About half the resultin...

Frenchman responsible for the belief that organisms could inherit acquired characteristics - Jean Baptiste de Lamark Time Spirit - Zeitgeist Effect caused when a natural disaster results in a few individuals remaining in a population with different allele frequencies by chance - Bottleneck effect Author of "Principles of Geology"; a book that would have an important influence on Darwin - Sir Charles Lyell He failed to become a doctor and a minister, but went on to revolutionize the st...

Bioenergetics - is the study of energy flow through a living system Metabolism - Refers to all chemical reactions of a cell or organism Metabolic Pathway - Is series of biochemical reactions that converts on or more substrates into a final product. Anabolic - Small molecules are assembled into large ones. Energy is required Catabolic - Large molecules are broken down into small ones. Energy is released. Energy - Is the ability to do work Kinetic Energy - Objects in motion

Meiosis usually produces___________ daughter cells. - Four haploid What structure is most important in forming the tetras? - Synaptonemal complex At which stage of meiosis are sister chromatids separated from each other? - anaphase II At metaphase I, homologous chromososmes are connected only at what structure? - Chiasmata chiasmata - the point where they connect and share information which of the following is not true regards to crossover? A) Spindle microtubules guide the transfer of ...

hepatitis A vaccine - is recommended for those who travel, especially military personnel hepatitis B vaccine - is given to infants and children as part of standard childhood immunizations, and provides protection against exposure to blood or body fluids from an infected person hepatitis A - is acquired via the fecal-oral route by eating fruits, vegetables, shellfish, or other foods that are contaminated during handling; children and young adults are the two groups most often affected...