D202 Human Growth and Development - Set 1 - Part 3

Correct Answer: Cortex

Most neural activity in the infant brain takes place in the cortex, which is responsible for higher-order brain functions such as cognition, perception, and movement.

Correct Answer: Two

The brains cortex is divided into two hemispheres, each responsible for different functions but also working together to control the body.

Correct Answer: Four

Each hemisphere of the brain has four lobes: frontal, parietal, occipital, and temporal, each associated with different functions.

Correct Answer: Fissures

Fissures are deep grooves or folds in the brain that separate the different lobes within each hemisphere.

Correct Answer: 16.5 hours per 24-hour period

Newborns typically sleep around 16.5 hours per day, which is essential for their rapid growth and brain development.

Correct Answer: 50%

Newborns spend about 50% of their sleep time in the REM (rapid eye movement) phase, which is important for brain development.

Correct Answer: More voluntary behaviors

The grasping and stepping reflexes seen in newborns eventually develop into more voluntary motor behaviors as the child grows.

Correct Answer: Grasping and stepping reflexes

The grasping and stepping reflexes are common in newborns but typically disappear within the first few months of life as motor skills develop.

Correct Answer: Eye-blink, swallowing, sneezing

Reflexes such as eye-blinking, swallowing, and sneezing are essential for survival and remain throughout life.

Correct Answer: Ability to grasp an object using the forefinger and thumb

The pincer grasp is a fine motor skill where an infant uses the thumb and forefinger to pick up small objects, typically developing around 9-12 months.