Human Anatomy Prep Quiz

2.

Which of the following lists the stages of prenatal development in the correct order?

Zygote, embryo, morula, cleavage, trophoblasts, fetus
Zygote, cleavage, morula, trophoblasts, embryo, fetus
Zygote, morula, clevage. trophoblasts, fetus, embryo

Correct Answer

A. Zygote, cleavage, morula, trophoblasts, embryo, fetus

Explanation

The correct answer is zygote, cleavage, morula, trophoblasts, embryo, fetus. This is the correct order of prenatal development stages. The zygote is formed when the sperm fertilizes the egg. Cleavage is the rapid division of the zygote into smaller cells. The morula is a solid ball of cells formed after several rounds of cleavage. Trophoblasts are cells that form the outer layer of the morula and eventually develop into the placenta. The embryo is formed when the inner cells of the morula differentiate into different cell types. Finally, the fetus is the stage of development after the embryo, where the organs and systems continue to grow and mature.

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3.

Which kind of tissue would you expect to find in an area of the body that experiences friction and wear and tear

Simple couboidal tissue
Simple columnar epithelial tissue
Stratified squamous epithelial tissue
Pseudostratified ciliated columanar epithelial tissue

Correct Answer

A. Stratified squamous epithelial tissue

Explanation

Stratified squamous epithelial tissue is the correct answer because it is designed to withstand friction and wear and tear. This type of tissue consists of multiple layers of flat cells that provide protection to underlying tissues. It is commonly found in areas of the body that experience constant abrasion, such as the skin, mouth, and esophagus. The stratified nature of this tissue allows for durability and regeneration, making it well-suited for areas that are subjected to mechanical stress.

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4.

What structure caps the head of a mature sperm and enables the sperm to penetrate an egg?

Mitochondria
Acrosome
Flagellum
Nucleaus

Correct Answer

A. Acrosome

Explanation

The acrosome is a structure that caps the head of a mature sperm. It contains enzymes that help the sperm penetrate the protective layers of the egg during fertilization. The mitochondria, flagellum, and nucleus are also important structures in a sperm, but they do not directly enable the sperm to penetrate an egg.

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5.

Which process would be stopped if a poison interefred with ATP production?

Osmosis
Lysosomes
Anaphase
Active transport
All are correct

Correct Answer

A. Active transport

Explanation

If a poison interferes with ATP production, it would affect the process of active transport. Active transport is an energy-dependent process that requires ATP to move substances across a cell membrane against their concentration gradient. Without ATP, active transport cannot occur, leading to disruption in the movement of ions and molecules across the membrane. Osmosis, lysosomes, and anaphase are not directly dependent on ATP production, so they would not be affected by the poison. Therefore, the correct answer is active transport.

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6.

Which of the following is not part of the preembryonic stage of development?

Cleavage
Formation of the three primary germ layers
Implantation
Appearance of organs and organ systems

Correct Answer

A. Appearance of organs and organ systems

Explanation

The preembryonic stage of development refers to the initial stages of embryonic development, before the formation of organs and organ systems. During this stage, the zygote undergoes cleavage, where it divides into multiple cells. It also goes through the process of implantation, where it attaches to the uterine wall. Additionally, the formation of the three primary germ layers, which give rise to different tissues and organs, occurs during this stage. Therefore, the appearance of organs and organ systems is not part of the preembryonic stage of development.

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7.

In the plasma membrane of the cell, cholestorol acts to

Form receptor molecules
Increase the fluidity of the membrane
Make the membrane more resistant to freezing
Restrict the energy of most molecules

Correct Answer

A. Increase the fluidity of the membrane

Explanation

Cholesterol acts to increase the fluidity of the plasma membrane. It does so by inserting itself between the phospholipid molecules in the membrane, preventing them from packing too closely together. This helps to maintain the proper balance of rigidity and flexibility in the membrane, allowing it to function properly.

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8.

Where in the female's reproductive tract does fertalization usually occur?

The utuerus
The vagina
The ovary
The cervix

Correct Answer

A. The ovary

Explanation

Fertilization usually occurs in the fallopian tubes, not in the ovary itself. After ovulation, the egg is released from the ovary and travels through the fallopian tubes towards the uterus. If sperm is present in the fallopian tubes, fertilization can occur there. The fertilized egg then implants itself in the uterus for further development.

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9.

In the cell life cycle, DNA is replicated during

G1
Anaphase
G2
S

Correct Answer

A. S

Explanation

In the cell life cycle, DNA is replicated during the S phase. This phase occurs after the G1 phase and before the G2 phase. During the S phase, the cell's DNA is duplicated, resulting in two identical copies of each chromosome. This ensures that each daughter cell formed during cell division will receive a complete set of genetic material. The G1 and G2 phases are important for cell growth and preparation for cell division, but DNA replication specifically occurs during the S phase.

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10.

Which organelle is most active aptosis(programmed cell death)? This organelle is also found in large amounts in white blood cells.

Nucleaus
Lysosomes
Aptopic
Mitochondria
Endoplasmic reticulum

Correct Answer

A. Mitochondria

Explanation

Mitochondria is the correct answer because it is the organelle most active in apoptosis, which is programmed cell death. Additionally, mitochondria are found in large amounts in white blood cells.

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Human Anatomy Prep Quiz

The release of an egg from the ovary is called

Quiz Preview

Which of the following lists the stages of prenatal development in the correct order?

Which kind of tissue would you expect to find in an area of the body that experiences friction and wear and tear

What structure caps the head of a mature sperm and enables the sperm to penetrate an egg?

Which process would be stopped if a poison interefred with ATP production?

Which of the following is not part of the preembryonic stage of development?

In the plasma membrane of the cell, cholestorol acts to

Where in the female's reproductive tract does fertalization usually occur?

In the cell life cycle, DNA is replicated during

Which organelle is most active aptosis(programmed cell death)? This organelle is also found in large amounts in white blood cells.