PTS CANFITPRO THEORY EXAM 2023-2024 ACTUAL
EXAM 150 REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A
What are
... [Show More] 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).
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.
What are golgi tendon organs? - ....ANSWER...proprioceptors located in tendons near
the myotendinous junction
what are two muscle fibre types? - ....ANSWER...slow twitch and fast twitch
muscle fibres best suited for endurance work due to their ability to use oxygen and
resist fatigue - ....ANSWER...slow twitch fibres: contain more mitochondria, contract
slowly and produce a lower amount of force but are more resistant to fatigue. work
aerobically.
muscle fibres best suited for short intense bursts of activity - ....ANSWER...fast twitch
fibres: able to produce and use atp more quickly, contract quickly and produce a lot of
force but fatigue quickly, work anaerobically.
what affects the percentage of each fibre typ [Show Less]