a baby throws its arms out and then inward as if embracing in response to loud noise or when its head falls which reflex is this

ATI RN

Exam 4 Psychology 101

1. A baby throws its arms out and then inward (as if embracing) in response to loud noise or when its head falls. Which reflex is this?

A. Babinski
B. Palmar
C. Darwinian
D. Moro

Correct answer: D

Rationale: The correct answer is D, Moro. The Moro reflex is an instinctual response seen in infants when they experience a sudden loss of support or loud noise. The baby will throw their arms out and then bring them back in, resembling an embrace. This reflex is important for survival as it helps the infant react to potential dangers. Choice A, Babinski, refers to the reflex where a baby's toes spread apart when the sole of the foot is stimulated. Choice B, Palmar, is related to the reflex where a baby's fingers close tightly around an object placed in their palm. Choice C, Darwinian, is not a recognized reflex in this context.

2. Children from lower-SES families ________.

A. are more likely to be resilient adults than those from higher-SES families.
B. show no signs of ill effects if there is an increase in SES before age 5.
C. are not affected by SES status unless persistent employment is the reason for the economic hardships of the family.
D. are less likely to show ill effects of SES status if they possess a high IQ and develop healthy attachments to adults and peers.

Correct answer: D

Rationale: Children from lower-SES families are less likely to show ill effects of SES status if they possess a high IQ and develop healthy attachments. Choice A is incorrect because children from lower-SES families typically face more challenges and are not inherently more resilient. Choice B is incorrect as an increase in SES may not erase the effects of early socioeconomic disadvantages. Choice C is incorrect as SES status can impact children from lower-SES families regardless of the reason for economic hardships.

3. Cortisol is a hormone that ________

A. is released by the hypothalamus and travels to the pituitary gland, causing it to respond.
B. the pituitary gland releases to stimulate the adrenal gland.
C. the adrenal gland produces that mobilizes the body to deal with stress.
D. reduces the reuptake of the monoamine neurotransmitters.

Correct answer: C

Rationale: The correct answer is C. Cortisol is a hormone produced by the adrenal gland that mobilizes the body to deal with stress. It helps regulate metabolism, reduce inflammation, and assist in memory formulation. Choice A is incorrect as cortisol is not released by the hypothalamus and does not travel to the pituitary gland. Choice B is incorrect as cortisol is not released by the pituitary gland but acts on it to regulate hormone production. Choice D is incorrect as cortisol does not reduce the reuptake of monoamine neurotransmitters.

4. What is extinction and how might it be used in treating a disorder?

A. Extinction strengthens the conditioned response by continuously pairing the conditioned stimulus with the unconditioned stimulus.
B. Extinction is the process of eliminating a conditioned response by repeatedly presenting the conditioned stimulus without the unconditioned stimulus.
C. Extinction is ineffective and is not used in treating disorders.
D. Extinction is the process of intensifying the conditioned response by pairing the conditioned stimulus with a stronger unconditioned stimulus.

Correct answer: B

Rationale: The correct answer is B. Extinction is the process of eliminating a conditioned response by repeatedly presenting the conditioned stimulus without the unconditioned stimulus. This helps in reducing or eliminating undesired behaviors. Choice A is incorrect because extinction does not strengthen the conditioned response but weakens it. Choice C is also incorrect as extinction is a valid technique used in treating disorders by reducing unwanted behaviors. Choice D is incorrect as extinction does not involve intensifying the conditioned response but rather diminishing it.

5. How does the concept of neural plasticity relate to recovery from brain injuries?

A. Neural plasticity means the brain cannot recover from injuries.
B. Neural plasticity allows the brain to recover and reorganize after injuries.
C. Neural plasticity refers to the brain's inability to change after injury.
D. Neural plasticity is a myth.

Correct answer: B

Rationale: Neural plasticity allows the brain to recover and reorganize after injuries. It is the brain's ability to adapt and change, forming new connections or reorganizing existing ones to compensate for damage. Choice A is incorrect as neural plasticity enables recovery. Choice C is incorrect as neural plasticity involves the brain's capacity to change. Choice D is incorrect as neural plasticity is a well-established phenomenon in neuroscience.