Which characteristic is true for non-covalent interactions?

What is the appropriate symbol to use for the sample standard deviation?

Nine-year-old Sarah complains to her mother about a large spot on her arm that itches. On closer inspection, it is a red circular spot with a raised edge. The next day, her parents take her to the doctor. The doctor examines the lesion using a Wood’s lamp, which emits ultraviolet light. The spot fluoresces, confirming the doctor’s suspicion. What condition does Sarah have? [color1] Sarah’s mother is mortified to hear that her daughter has a “worm.” Looking uncomfortable, Sarah says, “I want this worm out of me.” The doctor laughs and explains that it is not an actual worm. “Then what is it?” asks Sarah. What type of pathogen causes ringworm? [color2] The doctor cleans and scrapes the lesion to place a specimen on a slide. Under the microscope, macro- and microconidia of Trichophyton rubrum are visible, along with cell walls. In this picture it is possible to see macro- and microconidia in Trichophyton rubrum. Cell walls are also visible. What carbohydrate would you expect to find in these cell walls? [color3] Why can you now be sure that this is not caused by a worm (helminth)? [color4] The doctor prescribes a topical cream for Sarah’s mother to apply to the ringworm. If the cream does not work after a couple of weeks, Sarah should return for further testing. Positive identification of dermatophytes requires culturing, often on Sabouraud’s agar, which inhibits bacterial growth due to low acidity (pH 5.6) and contains peptones. Positive identification of dermatophytes requires culturing. For this purpose, Sabouraud’s agar may be used. This agar inhibits the growth of bacteria due to a low acidity (pH 5.6). The agar contains peptones. What kind of exoenzymes would the organism need to break down peptones for nitrogen and vitamin sources? [color5] Dextrose (glucose) is added to the agar as the carbon and energy source. This means that the organism is a [color6]. In the case of Sarah’s infection, which cleared up within 2 weeks of treatment, the culture would have a granular texture and would appear pale pink on top and red underneath. These features suggest that the dermatophyte is Trichophyton rubrum, a common cause of ringworm.

Nico says, “Dr. Peterson gave me a bad grade because she’s an unhappy person because she is so short.” Nico’s attribution regarding his grade assumes a(n) about himself:

Lucy’s mother is unhappy with her because she left her dirty laundry on the floor instead of putting it in the clothes hamper. Because Lucy’s mother doesn’t want to start another fight about laundry, she decides to remain silent. However, after a few minutes, Lucy asks “What’s wrong, Mom?” This is an example of which principle of interpersonal communication?

Blake says, “I would never join a fraternity. All the members do is get drunk and date sorority girls.”  Blake’s statement is an example of a(n):

Which infection control intervention should the nurse implement first when caring for this patient?

Which action by the nurse requires correction when caring for this patient?

When Patrick was 16 years old, his hand began twitching while picking up a glass at dinner. Five months later, in February 2001, he fell down the steps at his home and was unable to climb the steps to the bus. He went to the ER due to progressive muscle weakness. At the Children’s Hospital of Philadelphia, he was initially diagnosed with a demyelinating disease and treated with anti-inflammatory drugs and antibodies for 2 years, but he showed no improvement. Patrick suffered from a genetic disease that altered the structure of a single enzyme. The mutation in this enzyme caused: Loss of its ability to catalyze its specific reaction Loss of its ability to be regulated properly Which statement about enzymes is correct? [color1] Consider the following metabolic pathways: Pyruvate → Acetyl-CoA → Krebs cycle Pyruvate → Lactate (lactic acid) If Patrick’s enzyme, responsible for converting pyruvate to acetyl-CoA, were inhibited, what would happen to pyruvate metabolism? [color9] Patrick suffered from lactic acidosis, which caused hyperventilation, muscle pain and weakness, and abdominal pain and nausea. He inherited a mutation leading to pyruvate dehydrogenase complex disease (PDCD). Pyruvate dehydrogenase is the enzyme that converts pyruvate to acetyl-CoA in mitochondria. The brain depends heavily on glucose for fuel. PDCD leads to degeneration of gray matter in the brain. Pyruvate accumulates, causing alanine and lactate accumulation in the blood (lactic acidosis). The lack of pyruvate dehydrogenase also resulted in decreased energy production, impairing ion gradients across membranes, muscle contraction, and protein synthesis. Why did Patrick develop paralysis? [color8] What cellular process is impaired if acetyl-CoA cannot be generated? [color4] A ketogenic diet may be used to treat this enzyme deficiency. Which foods can be metabolized to generate acetyl-CoA directly? [color3] The loss of which molecule was most critical for Patrick’s paralysis? [color6] Resolution Despite his family’s efforts to care for him at home, Patrick remained in hospitals and nursing homes until his death in 2006. He passed away due to pneumonia, sepsis, and renal failure at the age of 21. His family is grateful that he survived for 5 years on a respirator, four years longer than initially predicted. Source: National Center for Case Study Teaching in Science, University at Buffalo, State University of New York

In human hair, the medulla is always present.