Human Reproduction and Development
Q. At what stage of human development does implantation occur?
-
A.
Zygote stage
-
B.
Blastocyst stage
-
C.
Embryonic stage
-
D.
Fetal stage
Solution
Implantation occurs when the blastocyst attaches to the uterine wall, typically around 6-10 days after fertilization.
Correct Answer: B — Blastocyst stage
Q. During which trimester does the majority of organ development occur?
-
A.
First trimester
-
B.
Second trimester
-
C.
Third trimester
-
D.
All trimesters equally
Solution
The first trimester is critical for organogenesis, where most major organs begin to form.
Correct Answer: A — First trimester
Q. What is the genetic makeup of a typical human female?
Solution
A typical human female has two X chromosomes, denoted as XX.
Correct Answer: B — XX
Q. What is the primary function of the placenta during human development?
-
A.
To provide oxygen and nutrients to the fetus
-
B.
To produce hormones
-
C.
To protect the fetus from infections
-
D.
To facilitate waste removal
Solution
The placenta serves as the interface between the mother and fetus, providing essential nutrients and oxygen while removing waste products.
Correct Answer: A — To provide oxygen and nutrients to the fetus
Q. What is the primary purpose of the umbilical cord?
-
A.
To connect the fetus to the placenta
-
B.
To provide structural support
-
C.
To produce hormones
-
D.
To facilitate gas exchange
Solution
The umbilical cord connects the fetus to the placenta, allowing for nutrient and waste exchange.
Correct Answer: A — To connect the fetus to the placenta
Q. What is the role of amniotic fluid?
-
A.
To provide nutrients to the fetus
-
B.
To cushion the fetus and allow for movement
-
C.
To facilitate gas exchange
-
D.
To produce hormones
Solution
Amniotic fluid surrounds the fetus, providing cushioning and allowing for movement, which is essential for musculoskeletal development.
Correct Answer: B — To cushion the fetus and allow for movement
Q. What is the term for the first cell formed after fertilization?
-
A.
Zygote
-
B.
Blastocyst
-
C.
Embryo
-
D.
Fetus
Solution
The zygote is the initial cell formed when a sperm fertilizes an egg.
Correct Answer: A — Zygote
Q. What is the term for the process of sperm and egg fusion?
-
A.
Fertilization
-
B.
Cleavage
-
C.
Gastrulation
-
D.
Implantation
Solution
Fertilization is the process where a sperm cell merges with an egg cell to form a zygote.
Correct Answer: A — Fertilization
Q. Which hormone is primarily responsible for maintaining pregnancy?
-
A.
Estrogen
-
B.
Progesterone
-
C.
Oxytocin
-
D.
Luteinizing hormone
Solution
Progesterone is crucial for maintaining the uterine lining and supporting early pregnancy.
Correct Answer: B — Progesterone
Q. Which structure develops from the ectoderm during embryonic development?
-
A.
Muscles
-
B.
Skin and nervous system
-
C.
Digestive system
-
D.
Lungs
Solution
The ectoderm gives rise to the skin and nervous system during embryonic development.
Correct Answer: B — Skin and nervous system
Showing 1 to 10 of 10 (1 Pages)
