Nokea
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:
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Which of the following are tropic hormones? (Select one that doesn't apply.)
- A. Somatotropin
- B. Follicle-stimulating hormone
- C. Antidiuretic hormone
- D. Thyroid-stimulating hormone
Correct Answer: C
Rationale: Tropic hormones are hormones that stimulate other endocrine glands to release their hormones. Antidiuretic hormone (C) is not a tropic hormone; it acts on the kidneys to regulate water balance. Somatotropin (A), follicle-stimulating hormone (B), and thyroid-stimulating hormone (D) are all tropic hormones that stimulate the release of hormones from other glands.
Which muscle of the quadriceps group is located on the lateral surface of the lower extremity?
- A. Vastus lateralis
- B. Gastrocnemius
- C. Anterior tibialis
- D. Rectus femoris
Correct Answer: A
Rationale: The correct answer is A: Vastus lateralis. The vastus lateralis is a muscle of the quadriceps group that is situated on the lateral side of the lower extremity. It is responsible for extending the knee joint. Gastrocnemius (choice B) is a muscle located in the calf, Anterior tibialis (choice C) is a muscle in the anterior compartment of the leg, and Rectus femoris (choice D) is a muscle of the quadriceps group but is not located on the lateral surface of the lower extremity. Therefore, they do not match the description provided in the question and are incorrect choices.
Arrector pili are responsible for which action?
- A. Production of sweat
- B. Increase in skin pigmentation.
- C. Acceleration of wrinkling in aging.
- D. Appearance of goose bumps.
Correct Answer: D
Rationale:
A tissue examined under the microscope exhibits the following characteristics: cells found on the internal surface of the stomach, no extracellular matrix, tall and thin cells, and no blood vessels in the tissue. What type of tissue is this?
- A. Epithelial
- B. Connective
- C. Muscle
- D. Cartilage
Correct Answer: A
Rationale: The correct answer is A: Epithelial. Epithelial tissue is characterized by cells tightly packed together that form a protective barrier on internal and external body surfaces. The description in the question matches the characteristics of epithelial tissue found lining the internal surface of organs like the stomach. This type of tissue lacks blood vessels and typically does not contain an extracellular matrix, which is a defining feature of connective tissue. Muscle tissue is composed of cells capable of contraction and relaxation, while cartilage is a type of connective tissue consisting of specialized cells embedded in a matrix.
Which anatomic structure houses the malleus, incus, and stapes?
- A. Nose
- B. Throat
- C. Eye
- D. Ear
Correct Answer: D
Rationale: The correct answer is D: Ear. The malleus, incus, and stapes, also known as the auditory ossicles, are the three smallest bones in the human body and are located in the middle ear. These bones play a crucial role in transmitting sound vibrations from the eardrum to the inner ear, facilitating the hearing process.