PTS CANFITPRO THEORY EXAM 2023-2024 ACTUAL EXAM 150 REAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A

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.