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Worksheets[Practice Test] Skeletal & Muscular Systems
Total questions: 20
Worksheet time: 10mins
Locomotion requires that an animal expend energy to overcome _____.
buoyancy
friction
gravity
pressure
temperature
Which skeleton moves in response to muscular contraction?
endoskeleton
exoskeleton
hydrostatic skeleton
all of these
none of these
Which of the following statements INCORRECTLY describes hydrostatic skeletons?
It consists of fluid held under pressure in a closed body compartment.
It helps protect other body parts by cushioning them from shocks.
It gives the body a fixed and rigid form.
It provides support for muscle action.
It can be found in earthworms, hydras, jellies - mostly soft and flexible animals.
A human’s internal organs are protected mainly by the _____.
hydrostatic skeleton
exoskeleton
axial skeleton
appendicular skeleton
Which kind of joint movement describes the movement of a limb in a circle around a fixed point such as the movement of your arm in relation to your shoulder?
flexion
extension
rotation
In a vertebrate, which of the following is NOT a part of the axial skeleton?
knee
ribs
skull
tail
vertebrae
What is a disadvantage to having an exoskeleton?
muscles do not work effectively
the body tissues are unprotected by it
it does not grow with the animal
it prevents the possibility of flying
How do ligaments differ from tendons in terms of their function?
Ligaments connect muscles to bones, while tendons connect bones to bones.
Ligaments connect bones to muscles, while tendons connect muscles to bones.
Ligaments provide energy for muscle contraction, while tendons protect internal organs.
Ligaments form the structure of the skeletal system, while tendons connect muscles to bones.
What are the ends of bone covered with that helps reduce friction when two bones are rubbed together?
tendon
ligament
cartilage
joint
Of what substance are intervertebral disks made?
smooth muscle
cartilage
ligaments
epithelial tissue
The sternum (breast bone) is a major site of red blood cell formation. The bones in the sternum must be ___ bones.
cartilaginous
compact
dense
fibrous
spongy
Myosin and actin are _____.
types of muscles
bones of the forearm
proteins that play a major role in muscle contraction
divisions of the skeletal system
What type of muscle is striated with intercalated disks?
smooth muscle
skeletal muscle
cardiac muscle
Arm muscles and leg muscles are arranged in antagonistic pairs. How does this affect their functioning?
It provides a backup if one of the muscles is injured.
One muscle of the pair pushes while the other pulls.
A single motor neuron can control both of them.
It allows the muscles to pull the bone in opposite directions, one at a time.
It doubles the strength of contraction.
How do smooth muscles differ from skeletal muscles in terms of their structure?
Smooth muscles are striated, while skeletal muscles are not.
Smooth muscles are voluntary, while skeletal muscles are involuntary.
Smooth muscles have a single nucleus, while skeletal muscles have multiple nuclei.
Smooth muscles are attached to bones, while skeletal muscles are attached to internal organs.
Which statement about muscle contraction is correct?
Thick filaments stretch, whereas thin filaments stay the same length.
A typical muscle fiber at rest contains enough ATP for millions of contractions.
Neither thin nor thick filaments change in size, although the area of overlap between them increases.
Thin filaments stretch, whereas thick filaments stay the same length.
What is the role of calcium in muscle contraction?
Its binding to a regulatory protein causes the protein to move, exposing actin binding sites to the myosin heads.
It provides energy for contraction.
It blocks contraction when the muscle relaxes
It forms the heads of the myosin molecules in the thick filaments inside a muscle fiber
How does the sliding filament theory explain muscle contraction?
It describes how muscles expand and contract during movement.
It explains the role of ligaments in muscle function.
It details the interaction between actin and myosin filaments during contraction.
It outlines the function of tendons in muscle movement.
When you bring your hand to your shoulder, your biceps muscle ___ and your triceps muscle ___.
contracts
relaxes
relaxes
contracts
contracts
contracts
relaxes
relaxes
lengthens
shortens
In muscle contraction, the breaking of the cross-bridge between actin and myosin is caused by___.
hydrolysis of ATP into ADP plus Pi
formation of ATP from ADP and Pi
release of Pi from the myosin head
binding of a new ATP to the myosin head
return of myosin to a high-energy state
