Which of the following is NOT a representation of Wolff's Law of bone remodeling? O Appositional growth in the bones of a weight lifter O Calcium reabsorption from the bones of a bed ridden patient O Osteoporosis causing decreased bone density O All are examples of Wolff's law

a QUESTION 2 All of the following describe spongy bone except OA Diploe OB Compact bone C Trabeculated OD Loosely woven

Which of the following contributes to the hardness of skeletal bones? the presence of cartilage the presence of proteoglycans the presence of collagen fibers the presence of glycoproteins the presence of inorganic hydroxyapatites étv

Given your understanding of Wolff’s Law, what mechanical consideration would be important when designing a bioreactor for osteocyte growth ex vivo?

At puberty in males the increase of testosterone results in: Group of answer choices appositional bone growth increases. osteoblasts increase the rate of bone resorption. epiphyseal plates widen rapidly. intramembranous ossification increases.

The normal physiologic regulation of calcium homeostasis is NOT regulated by which of the following? 1) Parathyroid hormone 2)  Vitamin D 3)  Parathyroid hormone-related protein 4)  Albumin no references, just homework

Compact bone contains many spaces O is found primarily in the epiphyses of long bones is arranged in units called osteons (Haversian systems) is avascular

Which of the following correctly describes the anatomy of a long bone?   A. has the diaphyses distally and proximally, with the epiphysis intermediate          B has yellow bone marrow in spongy bone & red marrow in the medullary cavity         C has a periosteum membrane internally; the endosteum is on the outside         D has an external layer of compact bone, with spongy bone found internally

When bones are subject to physical activity, Bones become less dense Bones become tend to become more dense and more mineralized Bones become less mineralized O None of the above

Osteoporosis is a condition in which the activation of certain signal transduction pathways causes calcium to be removed from bones, leaving them brittle and more likely to break under moderate pressure. Current research suggests that osteoporosis can be initiated under conditions of low cal- cium intake in order to increase the availability of calcium for other biological roles in the body. Which of the following describes the conditions that would be most likely to initiate osteoporosis? A B с D insufficient amounts of calcium to allow the replication of DNA molecules during cell division insufficient amounts of calcium to maintain the membrane potential established by the sodium-potassium pump insufficient amounts of calcium ions to facilitate efficient transduction of neuronal signals insufficient amounts of calcium to be used in the fixation stage of the Krebs cycle in photosynthesis