In the diagram, which is the mastoid process?
a) J b) K c) G d) H e) I Answer: a
Osteoporosis is most common in elderly women because of the lack of , which would inhibit
.
a) hGH; osteoclast activity
b) es
...
In the diagram, which is the mastoid process?
a) J b) K c) G d) H e) I Answer: a
Osteoporosis is most common in elderly women because of the lack of , which would inhibit
.
a) hGH; osteoclast activity
b) estrogen; osteoclast activity
c) IGFs; chondrocyte activity
d) PTH; osteoblast activity
e) Calcitonin; osteoclast activity Answer: b
Which of the following selections correctly lists the sequence of events that occur during intramembranous ossification?
a) Ossification center develops > Calcification > Formation of trabeculae > Development of new periosteum.
b) Calcification > Ossification center develops > Formation of trabeculae > Development of new periosteum.
c) Ossification center develops > Formation of trabeculae > Calcification > Development of new periosteum.
d) Development of new periosteum > Ossification center develops > Calcification > Formation of trabeculae.
e) Ossification center develops > Calcification > Development of new periosteum > Formation of trabeculae.
Answer: a
In endochondral ossification, what is the original source of osteoblasts?
a) endoderm
b) mesenchyme
c) mucus connective tissue
d) osteoprogenitor cells
e) ectoderm Answer: d
During endochondral ossification in a fetus, bones initially develop as a cartilage model that was formed from
a) periosteum.
b) endosteum.
c) perichondrium.
d) mesenchyme.
e) mucous connective tissue. Answer: d
Contraction of myofibrils within a muscle fiber begins when
a) sodium enters the muscle fiber
b) acetylcholine binds to ligand gates
c) calcium is released from the sarcoplasmic reticulum
d) an action potential travels t-tubules
e) calcium is moved into the sarcoplasmic reticulum Answer: c
Skeletal muscle contraction is triggered to begin when calcium is released from
a) myofibrils
b) mitochondria
c) terminal cisterns of sarcoplasmic reticulum
d) T-tubules Answer: c
All of the muscle fibers within the muscle are fully contracted in
a) A b) B c) C d) D Answer: D
Diltiazem is a calcium channel blocker, reducing free intracellular calcium. What stage of the
a) Latent period
b) Contraction period
c) Relaxation period
d) All myogram stages are
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