Biology (Mader), 10th Edition

Chapter 39: Locomotion and Support Systems

Post-Test

1
Which of the following has a hydrostatic skeleton?
A)Planarians
B)Grasshopper
C)Sea star
D)Shark
2
The whiplike movement of roundworms is due to the contraction of their _____ muscles.
A)longitudinal
B)circular
C)transverse
3
The exoskeletons of arthropods are _____.
A)jointed
B)formed of chitin
C)must be molted when the animal grows
D)All of these
4
An endoskeleton is associated with _____.
A)movement
B)support
C)protection of internal organs
D)All of these
5
An endoskeleton is observed in ______.
A)vertebrates
B)mollusks
C)annelids
D)All of these
6
Bone-forming cells _____.
A)are called osteoblasts
B)convert cartilage models to bone
C)take calcium from the blood
D)All of these
7
Osteoclast activity increases _____.
A)when blood calcium is low
B)when blood calcium is high
C)due to the presence of the hormone calcitonin.
8
When osteoblasts are trapped in the matrix they secrete, they _____.
A)begin to break down bone
B)are converted into osteocytes
C)weaken the bone
D)block the central canals
9
The medullary cavity (central shaft) of a long bone _____.
A)contains yellow bone marrow
B)produces red blood cells
C)stores calcium
D)contains many osteons
10
When blood oxygen is low, _____.
A)calcitonin increases
B)osteoclast activity increases
C)red bone marrow makes more red blood cells
D)osteoclasts become osteocytes
11
The spinal cord passes through the _____ and becomes the brain stem.
A)fontanel
B)zygomatic arch
C)foramen magnum
D)mandible
12
The humerus articulates with the _____.
A)scapula
B)ulna
C)radius
D)All of these
13
Which of the following is not associated with the pelvic girdle or leg?
A)Coxal bones
B)Femur
C)Clavicle
D)Fibula
14
When a muscle is stimulated, _____ ions that were stored in the sarcoplasmic reticulum are released.
A)chlorine
B)sodium
C)potassium
D)calcium
15
The H zone contains _____.
A)actin filaments only
B)myosin filaments only
C)actin and myosin filaments
16
Which of the following is found in a neuromuscular junction?
A)An axon bulb of a motor nerve fiber
B)A muscle fiber
C)A synaptic cleft
D)All of these
17
When calcium ions are released from the sarcoplasmic reticulum, they bind to _____.
A)actin
B)myosin
C)troponin
D)myoglobin
18
Oxygen is stored in muscle cells by _____.
A)lactate
B)actin
C)myoglobin
D)the sarcoplasmic reticulum
19
Calcium ion release is stimulated when _____ is released at a neuromuscular junction.
A)acetylcholine
B)lactate
C)epinephrine
D)myoglobin
20
Skeletal muscles are attached to the skeleton by bands of fibrous connective tissue called _____.
A)tendons
B)sarcomeres
C)ligaments
D)synovial membranes
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