ACTION PERSONAL TRAINER
CERTIFICATION| Q&A| Nervous system,
Skeletal System, Muscles| Updated
2024/2025
What is the primary function of the nervous system in relation to physical activity?
To coordinate and control body movements by transmitting signals between the brain, spinal
cord, an...
What is the primary function of the nervous system in relation to physical activity?
To coordinate and control body movements by transmitting signals between the brain, spinal
cord, and muscles.
How do neurons communicate with one another?
Neurons communicate through electrical impulses and neurotransmitters that cross synapses
between the nerve cells.
What are the two main divisions of the nervous system?
The central nervous system (CNS) and the peripheral nervous system (PNS).
What is the role of the motor neurons in the body?
Motor neurons transmit signals from the CNS to muscles, enabling movement and
coordination.
How do skeletal muscles differ from smooth and cardiac muscles?
1
, Skeletal muscles are under voluntary control, while smooth and cardiac muscles are
involuntary and not consciously controlled.
What is the primary unit of contraction in a skeletal muscle?
The sarcomere is the basic contractile unit within skeletal muscle fibers.
How does the sliding filament theory explain muscle contraction?
It describes how muscle fibers shorten as actin and myosin filaments slide past each other
during contraction.
What is the role of the sensory neurons in the nervous system?
Sensory neurons transmit sensory information from the body to the CNS for processing and
response.
What is the function of the autonomic nervous system?
The autonomic nervous system regulates involuntary bodily functions, including heart rate,
digestion, and respiratory rate.
How do ligaments differ from tendons in the musculoskeletal system?
Ligaments connect bones to other bones, while tendons attach muscles to bones.
What is the significance of the vertebral column in the skeletal system?
2
, The vertebral column protects the spinal cord and provides structural support and flexibility
to the upper body.
How do fast-twitch and slow-twitch muscle fibers differ in function?
Fast-twitch fibers are designed for short bursts of strength and speed, while slow-twitch
fibers are more efficient for endurance activities.
What is the primary role of calcium ions in muscle contraction?
Calcium ions facilitate the interaction between actin and myosin, allowing muscle fibers to
contract.
What type of joint allows for the greatest range of motion?
Ball-and-socket joints, such as the shoulder and hip joints, allow for a wide range of
movement in multiple directions.
How does the neuromuscular junction facilitate muscle contraction?
The neuromuscular junction is the synapse where a motor neuron communicates with a
muscle fiber, triggering contraction through the release of acetylcholine.
What are the primary functions of the skeletal system?
The skeletal system provides structure, supports body weight, protects vital organs, and
facilitates movement through its interaction with muscles.
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