Nokea
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.
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Why are the hydrochloric acid and digestive enzymes from the stomach unable to digest the stomach itself?
- A. The digestive enzymes in the stomach are too weak.
- B. Rugae lining of the stomach Is too tough to be attacked by digestive enzymes.
- C. Stomach wall is protected by large amounts of mucus.
- D. Stomach wall is composed of substances other than protein.
Correct Answer: C
Rationale:
What is the fundamental unit of life that constructs all living organisms?
- A. Atom
- B. Cell
- C. Organ
- D. Tissue
Correct Answer: B
Rationale: The correct answer is B: Cell. Cells are the fundamental structural and functional units of life that construct all living organisms. Cells carry out vital functions essential for life, such as growth, reproduction, and response to stimuli. While atoms are the basic units of matter, cells are specifically the fundamental units of life.
The calcaneus is located in what part of the body?
- A. Foot.
- B. Mouth.
- C. Head
- D. Hand.
Correct Answer: A
Rationale:
How much air does an adult inhale in an average breath?
- A. 500 mL
- B. 750 mL
- C. 1000 mL
- D. 1250 mL
Correct Answer: A
Rationale: An adult typically inhales around 500 mL of air in an average breath. This volume is known as tidal volume, representing the amount of air inspired or expired during normal breathing. Tidal volume plays a crucial role in efficient gas exchange in the lungs and maintaining adequate oxygen levels in the body. It is essential for proper respiratory function and ensuring the body receives the necessary oxygen for cellular respiration and overall metabolism.
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.