Physical Development

Question 1

Newborn brain is about___% its adult weight at birth and hits ___% of its adult weight by age 2.

Answer 1

25

80

Question 2

synaptogenesis

Answer 2

creation of new synapses

Question 3

myelin

Answer 3

fatty substance that covers axons

Question 4

synaptic pruning happens through ___

Answer 4

adolescence

Question 5

what is the least developed area of the brain at birth?

Answer 5

cerebral cortex

Question 6

brain weight and volume begins to decrease around __years of age. This accelerates at ___yrs

Answer 6

30

60

Question 7

what is the least developed sense at birth?

Answer 7

vision

Question 8

At birth, visual acuity is about ___feet and by __to__ months of age it is similar to adults. Adult acuity is __ to __.

Answer 8

20
7-8 months
400-600

Question 9

By ___ to__ months of age, babies prefer to look at their caregivers rather than strangers

Answer 9

1-2 months

Question 10

What are the 3 types of depth perception? And what is each types of perception?

Answer 10

KBP
kinetic-motion
binocular- from both eyes
pictorial-depth/texture /gradients/shadow/

Question 11

What are the first 2 senses to decline in adulthood?

Answer 11

Vision and hearing

Question 12

By what age does hearing come close to adult levels?

Answer 12

6 months

Question 13

Hearing starts to decline by what age?

Answer 13

40 yrs, starting with high frequency sounds

Question 14

what is presbycusis

Answer 14

decreased sensitivity to high pitched sounds

Question 15

What is the first sense to develop in utero?

Answer 15

touch, well developed at birth

Question 16

When does an adolescent growth spurt occur for girls and when for boys?

Answer 16

10-11 girls

12-13 boys