Nokea
Which structure forms the outer boundary of the cell?
- A. The nucleus
- B. The cytoplasm
- C. The plasma membrane
- D. The endoplasmic reticulum
Correct Answer: C
Rationale: The plasma membrane encloses the cytoplasm and forms the outer boundary of the cell. The nucleus, cytoplasm and endoplasmic reticulum are internal structures in the cell.
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Which are the tissues that lubricate and line the body surfaces that open to the outside environment?
- A. Mucous membranes
- B. Serous membranes
- C. Cytoplasm
- D. Involuntary visceral muscles
Correct Answer: A
Rationale: Mucous membranes secrete mucus. They line the body surfaces that open to the outside environment.
The nurse clarifies that the three functions of epithelial tissue are protection, , and secretion.
Correct Answer: absorption
Rationale: The function of epithelial tissue is protection by covering the body and preventing invasion; absorption by absorbing material; and secretion by secreting mucus to line and moisten the body surfaces.
The nurse explains that pinocytosis is a process by which cells perform which action?
- A. divide.
- B. take in extracellular fluid.
- C. use a chemical pump.
- D. convert mitochondria.
Correct Answer: B
Rationale: Pinocytosis is a process by which the cell wall makes an indentation allowing extracellular fluid to fill in, then encloses it into the cell.
In anatomic terminology, posterior means toward which body part?
- A. tail.
- B. head.
- C. back.
- D. trunk.
Correct Answer: C
Rationale: The posterior is toward the back.
Which anatomic structure(s) is/are NOT in the thoracic cavity?
- A. heart
- B. lungs
- C. blood vessels
- D. transverse colon
Correct Answer: D
Rationale: The transverse colon is located in the abdominal cavity.