PTS CANFITPRO THEORY EXAM 2023-2024 ACTUAL EXAM
150 REAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A
how many skeletal muscles are there in the human body? – ANSWER600 individual muscles. making up about 23% of a woman’s body
weight and 40% of a man’s. it is the most abundant tissue in the body
what are muscle cells made of? – ANSWER- water 73%, well organized
set of proteins 24%, a limited amount of inorganic salts.
what are muscle fibres? – ANSWER- elongated rod shaped cells making
up each muscle (thousands in one muscle). they are grouped into
bundles of 10-150 fibres.
what is fascicle? – ANSWER- bundle of 10-150 muscle fibres
what is the perimysium? – ANSWER- connective tissue that surrounds
fascicles.
what is the epimysium? – ANSWER- connective tissue that surrounds
the entire muscle
what is the tendon? – ANSWER- layers of connective tissue that
amalgamate at the ends of the muscle and attach to the bone.
What is the sarcolemma? – ANSWER- a thin elastic membrane that
encloses the contents of one muscle fibre.
What is the endomysium? – ANSWER- a thin layer of connective tissue
that surrounds each muscle fibre
What are myofibrils? – ANSWER- the thinner fibres that comprise each
muscle fibre
What are sarcomeres? – ANSWER- the basic unit of muscle contraction.
each one comprised of two types of protein: a thin filament called actin
and a thick one called myosin.
How does a muscle contract? – ANSWER- the individual myofilament
protein strands within the myofibrils are organized longitudinally along
the length of the muscle cell and interact to allow contraction.
what must happen for a muscle to shorten? – ANSWER- its cells must
covert energy (ATP) into mechanical work (contraction).
the term used to describe contraction in which the muscle shortens –
ANSWER- concentric contraction
the term used to describe a force exerted on the muscle as it lengthens –
ANSWER- eccentric contraction
Two parts of the nervous system – ANSWER- central nervous system
and peripheral nervous system
what are neurons? – ANSWER- they are nerve cells that that transport
nerve signals through out the body. there are two kinds: sensory and
motor.
carry information and sensations from the body and environment to the
CNS – ANSWER- sensory neurons
carry information from the CNS to the muscles to create a response or
movement. – ANSWER- motor neurons
what is a motor unit? – ANSWER- a single neuron together with the
muscle fibres it commands.
Proprioceptors – ANSWER- Sensory receptors, located in the muscles,
joints and tendons that provide information to the CNS to perform
coordinated movement and maintain muscle tone.
What are muscle spindles? – ANSWER- a type of proprioceptor that
consists of several modified muscle enclosed in a blanket of connective
tissue. they provide information about the length of a muscle fibre and
the rate of change in it’s length. they tell a muscle how much it needs to
contract to overcome a given stretch.