A 90-year-old woman is brought to the emergency department 30 minutes after she fell while climbing the steps into her house. Physical examination shows tenderness over the right shin area. An x-ray of the right lower extremity shows a fracture of the tibia. A DEXA scan shows decreased bone density. Increased activity of which of the following cell types is the most likely cause of the decrease in bone mass in this patient? (A)Chondrocytes (B) Osteoblasts (C) Osteoclasts (D) Osteocytes (E) Osteoprogenitor cells

A 90-year-old woman is brought to the emergency department 30 minutes after she fell while climbing the steps into her house. Physical examination shows tenderness over the right shin area. An x-ray of the right lower extremity shows a fracture of the tibia. A DEXA scan shows decreased bone density. Increased activity of which of the following cell types is the most likely cause of the decrease in bone mass in this patient? (A)Chondrocytes (B) Osteoblasts (C) Osteoclasts (D) Osteocytes (E) Osteoprogenitor cells

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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#6
Select the best answer or answers from the choices given: Wolff’s law is concerned with (a) calcium homeostasis of the blood, (b) the shape of a bone being determined by mechanical stresses placed on it, (c) the electrical charge on bone surfaces.
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Which of the following sentences is NOI correct? I. The process of bone formation is known as osteoporosis II. Myofibroblast is a connective tissue cell that contains properties of smooth muscle cells II. Diffusion is the overall movement of salts from a region of higher concentration to a region of lower concentration through a partially permeable membrane V. chromosomes of circulating RBCS are contained in the nucleus v. Calcitriol (active form of vitamin D) elevates blood Ca by acting on intestine, kidneys and stimulate osteoblast activity A. V only В. П.V C. II, III, V D. II, III, V E. All of the above
14
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Joe is a 65-year-old man. Two years ago, Joe was driving home from the golf course when he had a heart attack. Joe's car struck a tree head-on, and he broke his left leg in the accident. Today, Joe's leg has completely healed. However, his heart is not as strong as it was prior to the accident. Which one of the following statements best explains this situation? A. Bone tissue is repaired with lots of fibrosis; cardiac muscle has very little collagen. B. Only epithelial tissues and bone can regenerate;all other tissues are repaired with only fibrosis. C. None of these is relevant to the situation. D. Bone is good at regeneration; cardiac muscle has very little or no ability to regenerate. E. When bone tissue is damaged, there is no inflammation; cardiac muscle has lots of inflammation.
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