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Cardiac muscle contraction is considered to be voluntary movement. True or False - ANS False-- it moves involuntarily In the GI tract, smooth muscle is the major muscle type. True or False - ANS True In our body, approximately 8 liters of intestinal juices are secreted into the GI tract daily, but only 100ml of water is secreted into the feces. True or False - ANS True Normal movement of blood flow in the heart is: left atrium-- left ventricle-- right...

True - ANS Positive feedback mechanisms tend to increase the original stimulus. (t/f) True - ANS Without some sort of negative feedback mechanism, it would be impossible to keep our body chemistry in balance. (t/f) True - ANS Regardless of the variable being replaced, all homeostatic control mechanisms have at least three interdependent components. (t/f) Control Center - ANS If you consider your home air conditioner in terms of homeostasis, then the wall ...

In the gastrointestinal tract, smooth muscle is the main muscle type (True/False) - ANS True In our body, approx. 8 liters of intestinal juices are secreted into the GI tract daily, but only 100 ml of water is secreted into the feces. (True/False) - ANS True Normal movement of blood flow in the heart is: left atrium-left ventricle- lung- right atrium- right ventricle. (True/False) - ANS False. Right atrium-right ventricle-lung-left atrium-left ventricle. Nor...

Cardiac muscle contraction is considered to be voluntary movement. - ANS False; it moves involuntarily In the gastrointestinal tract, smooth muscle is enriched. - ANS True In our body, approximately 8 liters of intestinal juices are secreted into the GI tract daily, but only 100 ml of water is secreted into the feces. - ANS True Normal movement of blood flow in the heart is: left atrium-left ventricle-lung-right atrium-right ventricle. - ANS False; Right ...

Cardiac muscle contraction is considered to be what type of movement? - ANS involuntarily What is the major muscle type in the GI tract? - ANS smooth muscle T/F: In our body, approximately 8 liters of intestinal juices are secreted into the GI tract daily, but only 100 mL of water is secreted into the feces - ANS true What is the normal movement of blood flow in the heart? - ANS right atrium > right ventricle > lung > left atrium > left ventri...

Our body secretes about 8L of intestinal juices into the GI tract daily, but only _________ mL of water is excreted in feces. - ANS 100 mL (the rest is reabsorbed by the digestive system) How many lobes are found in the lungs? - ANS There are 3 lobes in the right lung, while the smaller left lung has 2 lobes, making space in the chest cavity for the heart. Filtrate produced by the glomerulus of the nephron will flow through the nephron tubules in what order? - ANS B...

T or F: Cardiac muscle contraction is considered to be a voluntary movement. - ANS False T or F: In the gastrointestinal tract, smooth muscle is the major muscle type. - ANS True T or F: In our body, approximately 8 liters of intestinal juices are secreted into the GI tract daily, but only 100 ml of water is secreted into the feces. - ANS True What is the normal movement of blood through the heart? - ANS Right atrium- right ventricle- lung- left atrium- l...

What chemical component of the plasma membrane prevents ions from readily and freely moving across the membrane? - ANS Lipids (phospholipids) Where is the concentration of [K+] greater? - ANS In the cytoplasm Across a cell's plasma membrane, movemen of water is a ___________ event. - ANS Passive through a channel. Where is the concentration of [Na+] greater? - ANS In the extracellular fluid. For a neutrally charged molecule, "Active" transport...

True/False: A normal lean person consists of ~ 95% water. - ANS False, ~ 60% water. True/False: Most of the sodium in the body is inside the cells. - ANS False; It is extracellular. True/False: The capillary is the main barrier between the intracellular and extracellular fluids. - ANS False; The cell wall (plasma membrane separates intracellular and extracellular fluid. The capillary separates the interstitium and the plasma, both sub- compartments of the extracellu...

Which of the following statements best describes the mechanism by which the ced-9 protein in the nematode C. elegans prevents apoptosis in normal cells? - ANS Active Ced9 prevents activation of Ced3 A loss of function of Apaf1, the human equivalent of ced-4 in C. elegans, is most likely to result in which of the following? - ANS a form of cancer in which normal apoptosis fails As mentioned in the lecture, both excessive and insufficient apoptosis can cause problems. If scie...

Define osmosis and water potential. Explain how water potential is measured. - ANS Osmosis = diffusion of water through a selectively permeable membrane Water potential: a measurement that combines the effects of solute concentration and pressure. • Water potential determines the direction of movement of water. • Water flows from regions of higher water potential to regions of lower water potential. • Potential refers to water's capacity to perform work. Measured in mega...

Alternate splicing does which of the following - ANS Allows partly different proteins to be translated from a single transcript In analyzing the number of different bases in a single-stranded messenger RNA, which rule is correct A + U = G + C A + T = C + U None of the other answers are correct. A = G - ANS None of the other answers are correct The role of snRNA is to - ANS help splice out introns from DNA Why does DNA replication require the enzyme primase -...

Gene Expression - ANS controlling what proteins to make or skip Prokaryotic gene expression - ANS should we make mRNA or not(simple) Eukaryotic gene expression - ANS many steps to control; transcribe rna; exit nucleus; transport mRNA to ribosome; etc. Promoter - ANS specific nucleotides that are recognized and bound by proteins transcription factors - ANS Collection of proteins that mediate the binding of RNA polymerase and the initiation of tr...

natural selection - ANS A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits. cell doctrine - ANS All living things are composed of cells A single cell is the smallest unit that exhibits all of the characteristics of life All cells come only from preexisting cells primary protein sequence - ANS the linear sequence of amino acids nucleic acid sequence - ANS ...

Tetrahymena is a genus of free-living ciliates that are common in freshwater ponds. They are model organisms used to study a variety of cellular processes, including plasma membrane fluidity. Tetrahymena can maintain homeostasis by altering the fatty acid composition of their cellular membranes. You grow Tetrahymena in normal temperatures and then expose these Tetrahymena to cold temperatures. Which of the following changes in plasma membrane composition are likely to occur? I. An increase i...

1. Why are viruses referred to as obligate parasites? A. They cannot reproduce outside of a host cell. B. Viral DNA always inserts itself into host DNA. C. They invariably kill any cell they infect. D. They can incorporate nucleic acids from other viruses. E. They must use enzymes encoded by the virus itself. - ANS A 2. What is the name given to viruses that are single-stranded RNA that acts as a template for DNA synthesis? A. retroviruses B. proviruses C. viroids D. bacteri...

what happens in G1 - ANS growth of the cell what happens in G0 - ANS cell exits to this stage when it will not divide what happens in G2 - ANS checks DNA replication, finishes growing, protein replication and most amount of DNA what happens in S - ANS DNA replication what happens in M - ANS Division what is CDK - ANS cyclin dependent kinase used to regulate cell cycle what is cyclin - ANS protein. binds to CDK, helps regul...

light microscope (LM) - ANS Visibke light is passed through a speciman and then through glass lenses Magnification - ANS The ratio of an objects image size to its real size Resolution - ANS The measure of the clarity of the image, or the minimum distance of two distinguishable points Contrast - ANS Visible differences in brightness between parts of the sample electron microscope (EM) - ANS Used to study sub cellular structures Scanning elect...

General features of fungi - ANS -Heterotrophic -polysaccharide cell walls with chitin -external digestion -hyphae -some are unicellular (yeast) Hyphae - ANS each of the branching filaments that make up the mycelium of a fungus. Mycelium - ANS mass of hyphae Chytridiomycota - ANS -aquatic, flagellated fungi -sexual gametes and asexual spores are motile fungal asexual reproduction - ANS spores are formed through budding or mitosis; conidia o...

Traits aren't transmitted in inheritance, but rather genes are - ANS Mendel's Key Discovery particular combination of alleles present - ANS genotype The expression of the traits in the individual - ANS phenotype any cross of an unknown genotype with a homozygous recessive genotype - ANS testcross the phenotype of heterozygous genotype is intermediate between the homozygous genotypes - ANS incomplete dominance This states that segregati...