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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?

A.

Palmer grasp rettex

B.

Babinski

C.

Rooting reflex:

D.

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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Related Questions

Correct Answer is ["2"]

Explanation

Given:

Desired dose: Ampicillin 0.5 g PO

Available concentration: Ampicillin capsules 250 mg each

To find:

Number of capsules to administer for a single dose

Step 1: Convert desired dose to milligrams

We know that 1 gram (g) is equal to 1000 milligrams (mg). Therefore, to convert the desired dose from grams to milligrams, we multiply by 1000:

Desired dose (mg) = Desired dose (g) x 1000

Desired dose (mg) = 0.5 g x 1000 = 500 mg

Step 2: Calculate the number of capsules

To find the number of capsules, we divide the desired dose by the strength of each capsule:

Number of capsules = Desired dose / Capsule strength

Number of capsules = 500 mg / 250 mg/capsule = 2 capsules

Correct Answer is B

Explanation

Naegele's Rule is a method used to estimate the due date of a pregnancy. It involves the following steps:

  1. Start with the first day of the client's last menstrual period (LMP).
  2. Add one year.
  3. Subtract three months.
  4. Add seven days.

Using the client's LMP of September 17:

  1. Start with September 17.
  2. Add one year: September 17, the following year.
  3. Subtract three months: June 17 of the following year.
  4. Add seven days: June 24.

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