Nokea
What do ceruminous glands secrete?
- A. Ear wax
- B. Keratin
- C. Mucus
- D. Oily sebum
Correct Answer: A
Rationale: Ceruminous glands are specialized sweat glands located in the ear canal that produce cerumen, commonly known as ear wax. The primary function of cerumen is to protect the ear canal by trapping dust and repelling water, preventing infections. Therefore, the correct answer is A: Ear wax.
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What is the function of thrombocytes?
- A. Blood clotting
- B. Oxygen transport
- C. Immune response
- D. Hormone production
Correct Answer: A
Rationale: Thrombocytes, also known as platelets, play a crucial role in blood clotting. When there is an injury or damage to a blood vessel, thrombocytes adhere to the site and form a plug to stop bleeding. This process is essential for wound healing and preventing excessive blood loss. Therefore, the correct function of thrombocytes is blood clotting.
Which of the following are functions of the skeletal system? (Select one that does not apply.)
- A. Support the body
- B. Hemopoiesis
- C. Conduct impulses
- D. Provide protection
Correct Answer: C
Rationale: The correct answer is C, 'Conduct impulses.' The skeletal system's primary functions include supporting the body, hemopoiesis (blood cell production), and providing protection to internal organs. Conducting impulses is a function of the nervous system, not the skeletal system. The skeletal system serves as the framework for the body, enabling movement, protecting vital organs, producing blood cells, storing minerals, and supporting the overall structure of the body.
In what area of the body would you expect to find an especially thick stratum corneum?
- A. Back of the hand
- B. Heel of the foot
- C. Abdomen
- D. Over the shin
Correct Answer: B
Rationale: The stratum corneum, the outermost layer of the epidermis, is composed of dead skin cells. Areas that are subjected to constant pressure or friction, such as the heel of the foot, tend to have a thicker stratum corneum as a protective mechanism against wear and tear. Therefore, an especially thick stratum corneum would be expected on the heel of the foot, making it the correct answer.
Nerve tissue is composed of neurons and connective tissue cells that are referred to as which of the following?
- A. Osteoblasts
- B. Neuroglia
- C. Osteocytes
- D. Arterioles
Correct Answer: B
Rationale: Nerve tissue is made up of neurons that transmit signals and neuroglia cells that support and protect the neurons. Neuroglia cells play a crucial role in providing structural support, insulation, and nutrients to neurons. Osteoblasts are bone-forming cells, osteocytes are mature bone cells, and arterioles are small arteries that carry blood away from the heart. Therefore, the correct answer is option B, Neuroglia.
What is the function of the thrombocytes?
- A. Form connective tissue.
- B. Play a role in blood clotting.
- C. Defend against infection.
- D. Transport respiratory gases.
Correct Answer: B
Rationale: