Human Anatomy Prep Quiz

Ovulation is the correct answer because it refers to the release of an egg from the ovary. During ovulation, a mature egg is released from the ovary and travels down the fallopian tube, where it may be fertilized by sperm. This process is a crucial part of the menstrual cycle and is necessary for reproduction. The other options, thelarchle, muscular tissue, and puberty, do not accurately describe the release of an egg from the ovary.

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.

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.

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.

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.

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.

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.

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.

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.

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.