Nokea
Which tissue serves as the framework of the body by providing support and structure for the organs?
- A. Epithelial
- B. Connective
- C. Nervous
- D. Muscle
Correct Answer: B
Rationale: Connective tissue serves as the framework of the body by providing support and structure for the organs. It is composed of cells and extracellular matrix, giving it strength and flexibility. Examples of connective tissue include bone, cartilage, and tendons, which play crucial roles in maintaining the body's shape and integrity.
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Which type of cell secretes antibodies?
- A. bacterial cell
- B. viral cell
- C. lymph cell
- D. plasma cells
Correct Answer: D
Rationale: Plasma cells are a type of white blood cell specialized in producing and secreting antibodies. Antibodies, also known as immunoglobulins, are vital components of the immune system that help recognize and neutralize pathogens. When the body encounters an antigen, plasma cells are activated to produce and secrete antibodies specific to that antigen. These antibodies bind to the pathogen, marking it for destruction by other immune cells. Therefore, plasma cells are the correct answer as they are specifically designed to produce and secrete antibodies to fight infections.
The orthopedic surgeon informs you that you have broken the middle region of the humerus. What is he describing?
- A. Epiphysis
- B. Articular cartilage
- C. Perichondrium
- D. Diaphysis
Correct Answer: D
Rationale: The correct answer is D, Diaphysis. The humerus is a long bone consisting of a shaft known as the diaphysis. The diaphysis is the middle region of a long bone, while the epiphysis refers to the ends of the long bone. Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints, and the perichondrium is the connective tissue covering the cartilage.
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.
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.
Where would you expect to find an especially thick stratum corneum in the body?
- A. Back of the hand
- B. Heel of the foot
- C. Abdomen
- D. Over the shin
Correct Answer: B
Rationale: The stratum corneum is the outermost layer of the epidermis, providing a protective barrier to the skin. Areas of the body that experience more friction and pressure tend to have a thicker stratum corneum. The heel of the foot is subjected to constant pressure and friction during walking and standing, leading to the development of a particularly thick stratum corneum to protect against wear and tear.