Product recalls on frozen hamburger are not uncommon during any given year. The meatpacking industry can experience problems when processing centers accidentally introduce this fecal bacterium into ground meat
Which organism is commonly found to be the culprit? A) Clostridium
B) E. coli
C) Streptococcus
D) Staphylococcus
B
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What would you expect the optimum pH to be for the salivary enzyme amylase, which digests starches into sugars?
What will be an ideal response?
Matching II. Choose the most appropriate answer
1. ___ autonomic nervous system 2. ___ frontal lobe 3. ___ cerebellum 4. ___ corpus callosum 5. ___ ganglion 6. ___ hypothalamus 7. ___ limbic system 8. ___ medulla oblongata 9. ___ midbrain 10. ___ nerve net 11. ___ peripheral nervous system 12. ___ reticular formation 13. ___ meninges 14. ___ neurotransmitter molecule 15. ___ white matter A. integrates body position, motions, balance B. in cnidarians; based on reflex pathways devoted to swimming and feeding C. messages from here arouse the brain and maintain wakefulness D. the cortical region that coordinates muscles required for speech E. all parts of nerve cells outside the brain and spinal cord F. acetylcholine is an example G. reflex control center for breathing, heart rate, and blood pressure H. axons of the central nervous system that are sheathed with fatty myelin I. at top of the brainstem bordering the cerebral hemispheres; influences learning and emotional behavior J. motor neurons that are divided into sympathetic and parasympathetic divisions K. membrane coverings over brain spinal cord L. contains the tectum; receives and integrates sensory information that is largely sent on to the forebrain for further neural processing M. connects right and left cerebral hemispheres N. group of nerve cell bodies that form an integrative center O. contains centers concerned with body temperature regulation and with salt and water balance
DNA and its attached proteins are known as ____
a. nucleoli b. the nuclear envelope c. chromatin d. nucleotides e. genes
Cytotoxic T cells will bind with their TCR to which of the following?
A) antigens presented with MHC I molecules B) antigens presented with MHC II molecules C) free antigen in a soluble form D) haptens only