Human Body Basics: Skeletal, Muscular, and Nervous Systems
Skeletal System
What is the primary function of the skeletal system?
B. Supporting and protecting the body
Which type of bones are the femur, tibia, and humerus?
C. Long bones
What type of bone is the skull?
B. Flat bone
What part of the skeleton includes the skull, hyoid bone, and rib cage?
B. Axial skeleton
Where is bone marrow found?
C. Inside the bone cavities
What is the process of replacing cartilage with bone tissue called?
A. Ossification
Which type of joint allows for the widest range of motion?
B. Ball-and-socket joint
Which type of bone marrow is responsible for producing blood cells?
B. Red marrow
What mineral is most abundant in bones?
C. Calcium
Which bone is the longest and strongest in the human body?
B. Femur
What type of joint is found in the shoulder and hip?
B. Ball-and-socket joint
Which structure connects bones to other bones?
B. Ligaments
Which bone is found in the upper arm?
C. Humerus
Muscular System
Which type of muscle is responsible for voluntary movements?
C. Skeletal muscle
Where are smooth muscles primarily found?
C. In internal organs and blood vessels
What is the primary function of cardiac muscle?
B. Pumping blood throughout the body
Which type of movement involves decreasing the angle between two bones?
C. Flexion
What type of muscle contraction is controlled by the autonomic nervous system?
C. Involuntary contraction
Which type of muscle has a unique branching structure?
C. Cardiac muscle
What is the primary function of skeletal muscles?
C. Facilitating voluntary movements
Which muscle type contracts and relaxes quickly, enabling rapid movements?
B. Skeletal muscle
What is the term for moving a limb away from the midline of the body?
B. Abduction
Nervous System
What are the two main parts of the nervous system?
A. Central and Peripheral
What cells are the fundamental units of the nervous system?
B. Neurons
Which part of the neuron receives signals from other neurons?
C. Dendrites
What is the junction between two neurons called?
C. Synapse
What chemical messengers transmit signals between neurons?
C. Neurotransmitters
What is the process of generating new neurons called?
A. Neurogenesis
Which part of the nervous system controls voluntary movements?
D. Somatic nervous system
Which neurotransmitter is involved in regulating mood and sleep?
B. Serotonin
What is the main function of the central nervous system?
D. Acting as the command center
Which system controls involuntary bodily functions like heart rate and digestion?
B. Autonomic nervous system
What part of the brain processes sensory information and coordinates voluntary movement?
A. Cerebrum
Which type of neuron detects stimuli from the environment?
B. Sensory neurons
What is the small gap between two neurons called?
A. Synaptic cleft
Which neurotransmitter is primarily involved in muscle contraction?
C. Acetylcholine
Which part of the brain is involved in regulating vital functions like heart rate and breathing?
C. Brainstem
Which system prepares the body for action by increasing heart rate and blood pressure?
D. Sympathetic nervous system
Which neurotransmitter is often associated with reward and pleasure?
A. Dopamine
What is the term for the brain’s ability to adapt and reorganize itself?
C. Neuroplasticity
What is the main function of the peripheral nervous system?
C. Transmitting signals to and from the central nervous system
Which division of the autonomic nervous system promotes rest and relaxation?
C. Parasympathetic nervous system
What is the primary function of the cerebellum?
B. Coordinating voluntary movements and balance
Which part of the nervous system is responsible for the “fight or flight” response?
C. Sympathetic nervous system
What is the main role of GABA (gamma-aminobutyric acid) in the nervous system?
B. Inhibitory neurotransmitter
What type of signals do neurons use to communicate?
B. Electrical
Which neurotransmitter is primarily involved in mood regulation and social behavior?
B. Serotonin
Which part of the nervous system includes all the nerves that branch out from the brain and spinal cord?
C. Peripheral nervous system