By the age of 7 months, the infant is able to do all the following EXCEPT

Correct Answer: D

Rationale: Cruising typically occurs later, around 9-10 months.

Correct Answer: C

Rationale: Changing formula is less critical if the baby is gaining weight adequately.

Correct Answer: D

Rationale: Nephrosis, also known as nephrotic syndrome, is characterized by the presence of massive proteinuria (excretion of more than 3.5 grams of protein in the urine per day), hypoalbuminemia (low levels of albumin in the blood), and edema (swelling due to fluid retention). These are the hallmark clinical manifestations of nephrosis. Proteinuria results from damage to the glomerular filtration barrier, leading to the loss of proteins, particularly albumin, in the urine. Hypoalbuminemia occurs due to the excessive loss of albumin in the urine, leading to reduced oncotic pressure in the bloodstream. Edema develops as a result of decreased oncotic pressure, which causes fluid to leak from the blood vessels into the tissues, especially in the lower extremities and around the eyes. Other common manifestations of nephrosis may include hyperlipidemia, lipid

Correct Answer: B

Rationale: Rocky Mountain spotted fever is caused by the bite of an infected tick. The bacterium Rickettsia rickettsii is transmitted to humans through the bite of the American dog tick, the Rocky Mountain wood tick, or the brown dog tick. These ticks are commonly found in wooded areas and attach themselves to the skin of humans or animals, transmitting the bacteria responsible for Rocky Mountain spotted fever. It is important to take precautions to prevent tick bites, such as using insect repellent, wearing long sleeves and pants when in wooded areas, and conducting thorough tick checks after being outdoors.

Correct Answer: C

Rationale: The clinical manifestations of Parkinson's disease, including bradykinesia, rigidity, and tremors, are directly related to a decreased level of dopamine in the brain. Dopamine is a neurotransmitter that plays a crucial role in regulating movement and coordination. A decrease in dopamine levels results in the characteristic motor symptoms observed in Parkinson's disease. The treatment for Parkinson's disease often involves medications that help increase dopamine levels in the brain, such as levodopa, to alleviate these symptoms.