Which of the following is an example of a primitive reflex that is present in newborns and typically disappears by 3-4 months of age?

Palmer grasp rettex

Babinski

Rooting reflex:

Moro reflex

Answer and Explanation

The Correct Answer is D

A) Palmer grasp reflex:
The palmer grasp reflex is a primitive reflex in which a newborn will grasp an object placed in their hand. While this reflex is present at birth, it typically disappears by 5-6 months of age, not by 3-4 months. The Moro reflex, which is more related to startle and sudden movements, is the correct answer in this case.

B) Babinski reflex:
The Babinski reflex, in which the toes fan out when the sole of the foot is stroked, is present at birth but typically disappears by 12 months. This reflex is an indicator of neurological development, and its presence beyond the first year could suggest neurological concerns, but it is not the reflex in question here.

C) Rooting reflex:
The rooting reflex occurs when the newborn turns their head and opens their mouth in response to cheek stimulation, typically to find the nipple for breastfeeding. This reflex is present at birth and usually disappears by 3-4 months, which is similar to the timing mentioned in the question.

D) Moro reflex:
The Moro reflex is a startle reflex in which the infant spreads their arms and then pulls them back in when they feel a sudden loss of support or a loud noise. This reflex is present at birth and typically disappears by 3-4 months of age. It is considered a classic primitive reflex that fades as the infant's nervous system matures.

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Correct Answer is B

Explanation

A) Right upper quadrant:
The right upper quadrant would not be the most appropriate place to auscultate the fetal heart rate in this scenario. In a vertex presentation with the fetal back on the left side, the best location for auscultation is typically along the fetal back, which is on the left side of the mother. The right upper quadrant would place you over the small parts of the fetus (limbs, hands, etc.), which generally would not be where the fetal heart rate is best heard.

B) Left upper quadrant:
The left upper quadrant is the most appropriate area to begin auscultation for this fetal heart rate (FHR) pattern. In this position, the fetal back is positioned towards the left side of the mother's abdomen, and the heart rate is typically heard most clearly over the back. The left upper quadrant would be over the fetal back, making it the best location to auscultate the FHR accurately.

C) Right lower quadrant:
The right lower quadrant would not be ideal for auscultating the fetal heart rate in this scenario. Since the fetal back is on the left side, the right lower quadrant would likely be over the fetal small parts (arms and legs), where the FHR would be harder to distinguish.

D) Left lower quadrant:
Although the left lower quadrant is on the left side of the mother, it's closer to the pelvic area and may be less effective for auscultating the fetal heart rate in this vertex presentation. It's more likely to be over the lower parts of the fetus, potentially interfering with accurate heart rate auscultation.

Correct Answer is ["33"]

Explanation

Given:

Total volume to infuse: 100 mL

Infusion time: 60 minutes

Drop factor of tubing: 20 gtt/mL

To find:

Drip rate (gtt/min)

Step 1: Calculate the total number of drops

Total drops = Total volume x Drop factor

Total drops = 100 mL x 20 gtt/mL = 2000 gtt

Step 2: Calculate the drip rate

Drip rate = Total drops / Infusion time in minutes

Drip rate = 2000 gtt / 60 minutes = 33.33 gtt/min

Step 3: Round to the nearest whole number

33 gtt/min.

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Which of the following is an example of a primitive reflex that is present in newborns and typically disappears by 3-4 months of age?

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Naxlex Comprehensive Predictor Exams

Correct Answer is B

Explanation

Calculate the gravity rate for gentamycin 100 mg/100ml with secondary tubing (20gtts/mL) over 60 minutes.

Correct Answer is ["33"]

Explanation

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