Exam 3 Review Questions Flashcards
All of the following components of the bone matrix are organic (contains carbon) except
a. Hydroxyapatite
b. Collagen
c. Chondroitin sulfate
d. Glycoproteins
e. Proteoglycans
a. Hydroxyapatite
As the amount of calcitonin in the blood increases, the amount of calcium
a. In the blood increases
b. Released from the bone increases
c. In the blood decreases
d. Both A and B
c. In the blood decreases
What would you find in the marrow cavity of the diaphysis of a child’s humerus (arm bone)?
a. spongy bone b. hemopoietic tissue c. red bone marrow d. yellow bone marrow e. compact bone
c. red bone marrow
In relaxed muscle fiber, the active sites of action are blocked by
tropomyosin
The quadriceps femoris includes all of the following parts except
a. the vastus medialis b. the rectus femoris c. the vastus intermedius d. the vastus femoris e. the vastus lateralis
e. the vastus lateralis
The region of a sarcomere where action and myosin overlap is
a. the Z disc b. the H band c. the A band d. the I band
c. the A band
Muscles need _______________ and ___________________ to contract
myosin, actin
If a poison inhibits the activity of acetylcholinesterase, a muscle…
maybe unable to relax
The longest muscle of the human body is …
the sartorius
Which of the following is considered to be a regulatory protein of the myofilaments?
a. G actin b. troponin c. cholinesterase d. myosin
b. troponin
Muscle fibers are arranged in bundles called _________________.
fascicles
Crossing your legs while sitting employs mainly the…
sartorius
Each end of a sarcomere is marked by…
a z disc
The bright red color of skeletal muscles is due mainly to its…
myoglobin
Which of the following is not a muscle of the lower extremity?
a. Sartorius b. adductor magnus c. pectineus d. semitendinosus e. flexor carpi ulnaris
e. flexor carpi ulnaris
