A nurse is caring for a client who has an infection caused by Streptococcus pyogenes. The nurse understands that this microorganism belongs to what group of bacteria?

Gram-positive cocci

Gram-negative cocci

Gram-positive bacilli

Gram-negative bacilli

Answer and Explanation

The Correct Answer is A

Choice A reason:

Gram-positive cocci are bacteria that have a spherical shape and stain purple with Gram stain due to their thick peptidoglycan cell wall. Streptococcus pyogenes is an example of gram-positive cocci that can cause infections such as pharyngitis, impetigo, cellulitis, necrotizing fasciitis, or rheumatic fever.

Choice B reason:

Gram-negative cocci are bacteria that have a spherical shape and stain pink with Gram stain due to their thin peptidoglycan cell wall and outer membrane. Neisseria gonorrhoeae and Neisseria meningitidis are examples of gram-negative cocci that can cause infections such as gonorrhea, meningitis, or septicemia.

Choice C reason:

Gram-positive bacilli are bacteria that have a rod-shaped shape and stain purple with Gram stain due to their thick peptidoglycan cell wall. Bacillus anthracis and Clostridium botulinum are examples of gram-positive bacilli that can cause infections such as anthrax, botulism, or tetanus.

Choice D reason:

Gram-negative bacilli are bacteria that have a rod-shaped shape and stain pink with Gram stain due to their thin peptidoglycan cell wall and outer membrane. Escherichia coli and Pseudomonas aeruginosa are examples of gram-negative bacilli that can cause infections such as urinary tract infection, wound infection, or sepsis.

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Correct Answer is D

Explanation

Choice A reason:

Atrophy is a decrease in cell size or number in response to adverse stimuli, such as disuse, ischemia, or malnutrition. It does not increase the risk of cancer, but it can impair the function of tissues and organs.

Choice B reason:

Hypertrophy is an increase in cell size in response to normal or abnormal stimuli, such as exercise, hormones, or hypertension. It does not increase the risk of cancer, but it can affect the function of tissues and organs.

Choice C reason:

Hyperplasia is an increase in cell number in response to normal or abnormal stimuli, such as hormones, inflammation, or wound healing. It does not increase the risk of cancer, but it can cause excessive growth of tissues and organs.

Choice D reason:

Dysplasia is an abnormal and potentially reversible change in cell size, shape, and organization in response to persistent stressors. It can be a precursor to cancer if it is not detected and treated early.

A. Decreased hematocrit B. Increased urine specific gravity C. Decreased central venous pressure D. Increased blood urea nitrogen

Correct Answer is A

Explanation

Choice A reason:

Decreased hematocrit is an indicator of improvement for a client who has hypovolemia and is receiving IV fluid therapy. Hematocrit is the percentage of red blood cells in the blood. Hypovolemia causes hemoconcentration, which increases the hematocrit level. IV fluid therapy restores the blood volume and dilutes the red blood cells, which decreases the hematocrit level.

Choice B reason:

Increased urine specific gravity is not an indicator of improvement for a client who has hypovolemia and is receiving IV fluid therapy. Urine specific gravity is a measure of the concentration of solutes in the urine. Hypovolemia causes dehydration, which increases the urine specific gravity. IV fluid therapy rehydrates the body and lowers the urine specific gravity.

Choice C reason:

Decreased central venous pressure is not an indicator of improvement for a client who has hypovolemia and is receiving IV fluid therapy. Central venous pressure is a measure of the pressure in the right atrium and vena cava. Hypovolemia causes decreased preload, which lowers the central venous pressure. IV fluid therapy increases preload and raises the central venous pressure.

Choice D reason:

Increased blood urea nitrogen is not an indicator of improvement for a client who has hypovolemia and is receiving IV fluid therapy. Blood urea nitrogen is a measure of the amount of urea in the blood. Urea is a waste product of protein metabolism that is excreted by the kidneys. Hypovolemia causes decreased renal perfusion, which increases the blood urea nitrogen level. IV fluid therapy improves renal perfusion and lowers the blood urea nitrogen level.

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A nurse is caring for a client who has an infection caused by Streptococcus pyogenes. The nurse understands that this microorganism belongs to what group of bacteria?

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Correct Answer is D

Explanation

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Correct Answer is A

Explanation

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A nurse is caring for a client who has an infection caused by Streptococcus pyogenes. The nurse understands that this microorganism belongs to what group of bacteria?