Nokea
Which type of joint within the synovial category is the elbow classified as?
- A. Pivot
- B. Hinge
- C. Ball and socket
- D. Toddle
Correct Answer: B
Rationale: The correct answer is B: Hinge. The elbow joint is classified as a hinge joint within the synovial category. Hinge joints primarily allow for flexion and extension movements, resembling a door hinge. In the case of the elbow joint, it enables the bending and straightening actions of the arm, crucial for various activities involving the upper limb.
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A tissue examined under the microscope exhibits the following characteristics: cells found on the internal surface of the stomach, no extracellular matrix, cells tall and thin, and no blood vessels in the tissue. What type of tissue is this?
- A. Epithelial
- B. Connective
- C. Muscle
- D. Nervous
Correct Answer: A
Rationale: The correct answer is A: Epithelial. Epithelial tissues are made up of closely packed cells that line the surfaces and cavities of the body. The characteristics described in the question, such as cells found on the internal surface of the stomach, tall and thin cells, absence of extracellular matrix, and no blood vessels, are typical of epithelial tissues. These tissues serve functions like protection, absorption, and secretion, making them well-suited for lining organs like the stomach.
Which structure regulates the transport of substances in and out of a cell?
- A. Nuclear membrane.
- B. Cell’s cytoplasm.
- C. Cell membrane.
- D. Cell wall.
Correct Answer: C
Rationale:
Which type of tissue is characterized by cells found on the internal surface of the stomach, no extracellular matrix, tall and thin cells, and the absence of blood vessels?
- A. Epithelial
- B. Connective
- C. Muscle
- D. Cartilage
Correct Answer: A
Rationale: The tissue described in the question, where cells are found on the internal surface of the stomach, are tall and thin, lack an extracellular matrix, and do not contain blood vessels, corresponds to epithelial tissue. Epithelial tissue functions to protect, absorb, and secrete, making it well-suited for lining surfaces and forming barriers in the body.
Which type of cell division occurs in the gonads?
- A. Mitosis
- B. Meiosis
- C. Binary fission
- D. Asexual division
Correct Answer: B
Rationale: Meiosis is the type of cell division that occurs in the gonads. During meiosis, cells undergo two rounds of division resulting in the formation of gametes (sperm and egg cells) with half the number of chromosomes. This process is vital for sexual reproduction and genetic diversity.
An over-production of cerumen can accumulate in which area?
- A. In the nose.
- B. On the eyelids and eyes.
- C. In the external ear canals.
- D. On the teeth
Correct Answer: C
Rationale: