Nokea
What is the result when a single zygote separates into two parts, each developing into a separate individual?
- A. Dizygotic twin
- B. Monozygotic twin
- C. Fraternal twin
- D. Nonidentical twin
Correct Answer: B
Rationale: The correct answer is B, Monozygotic twin. A monozygotic twin, also known as an identical twin, is the result when a single zygote splits into two parts, leading to the development of two genetically identical individuals. Choices A, C, and D are incorrect because they do not accurately describe the scenario where a single zygote splits into two parts to form identical twins. Dizygotic twin (Choice A) refers to fraternal twins, which result from two separate eggs fertilized by two different sperm cells. Fraternal twin (Choice C) is another term for dizygotic twins, arising from two separate zygotes. Nonidentical twin (Choice D) is a synonymous term for dizygotic or fraternal twins, indicating that they are not genetically identical.
You may also like to solve these questions
If a pair of monozygotic twins raised in the same environment end up being different from one another (e.g., interests, hobbies, etc.), it is highly likely due to:
- A. Cephalocaudal pattern
- B. Proximodistal pattern
- C. Cephamodistal pattern
- D. Gene-environment correlation
Correct Answer: B
Rationale: The correct answer is B: Proximodistal pattern. Differences between monozygotic twins raised in the same environment are likely due to non-shared environmental influences, which lead to differences in interests, hobbies, and other individual characteristics. Choices A, C, and D are incorrect. Cephalocaudal pattern refers to the principle of development from head to toe, not relevant in explaining differences between twins. Cephamodistal pattern is not a recognized developmental term. Gene-environment correlation does not directly explain the differences between identical twins raised in the same environment.
Children whose temperament is generally mild but who are hesitant about accepting new experiences are described as?
- A. Secure
- B. Avoidant
- C. Ambivalent
- D. Disorganized
Correct Answer: C
Rationale: The correct answer is C: 'Ambivalent.' Children with an ambivalent temperament are indeed generally mild but hesitant about accepting new experiences. This temperament is characterized by a combination of mildness and hesitance. Choice A, 'Secure,' refers to children who are comfortable with both their caregiver's presence and absence, showing a secure attachment style. Choice B, 'Avoidant,' describes children who tend to avoid or ignore their caregiver, displaying an insecure attachment style. Choice D, 'Disorganized,' represents children with inconsistent or confused behaviors towards their caregiver, exhibiting an insecure and disoriented attachment style.
What term refers to the awareness that other people have their own intentions, desires, wants, and motives?
- A. Theory of mind
- B. Theory of personality
- C. Theory of being
- D. Theory of awareness
Correct Answer: A
Rationale: The correct answer is 'Theory of mind.' Theory of mind is the understanding that others have their own thoughts, feelings, and intentions. This ability allows individuals to attribute mental states to others, enabling them to understand and predict behavior based on those mental states. Choices B, C, and D are incorrect because they do not specifically address the awareness of others' intentions, desires, wants, and motives.
In a breech presentation, how is the infant positioned for delivery?
- A. Is too large to be delivered vaginally.
- B. Is delivered feet or bottom first.
- C. Is delivered head first.
- D. Appears face down.
Correct Answer: B
Rationale: In a breech presentation, the infant is positioned to be delivered feet or bottom first. This is because the baby's pelvis or feet enter the birth canal before the head. Therefore, choice B is correct. Choices A, C, and D are incorrect because a breech presentation specifically refers to the baby being positioned feet or bottom first, not head first, face down, or being too large for vaginal delivery.
While out for a walk, you come across a ferocious dog. You feel your heart beating faster and your palms begin to sweat. Which part of the peripheral nervous system is activated in this situation?
- A. Autonomic
- B. Sympathetic
- C. Parasympathetic
- D. Somatic
Correct Answer: B
Rationale: The correct answer is B: Sympathetic. When encountering a stressful situation like a ferocious dog, the sympathetic nervous system is activated, leading to the 'fight or flight' response. This response triggers physiological changes like increased heart rate, sweating, and heightened alertness to prepare the body to deal with the perceived threat. The autonomic nervous system (Choice A) encompasses both the sympathetic and parasympathetic divisions, so it's a broader category. The parasympathetic nervous system (Choice C) is responsible for the body's 'rest and digest' functions, which are opposite to the physiological changes seen in a stress response. The somatic nervous system (Choice D) controls voluntary movements and sensory information, not the physiological responses seen in a stress reaction.