Question

1. what organs make up the central nervous system (cns)? join them with their correct definitions

rounded shape, two symmetrical halves called cerebral hemispheres
has many folds and coordinates our voluntary movements
protected by the spinal column, starts here and extends to all parts
of the body
connect the brain and the cerebellum to the spinal cord
connect the cns to the rest of the organism

1. what are the main 3 functions of nervous system?

sensory \t information \t and \t motor

the world around us continuously stimulates our. these come in different varieties such
as: sounds, taste, and touch, pressure, vibration, cold etc.

1. choose the correct answer to the following questions:

what are stimuli?
they are events or objects that activate the senses
they are orders that make our bodies respond
they are structural elements of our bodies’
nervous systems.
what are nervous system responses?
they are nerve impulses
they are reactions of the nervous system to
stimuli.
they are internal responses to stimuli

the part of the central nervous system where voluntary actions originate is called:

1. what does a neuron consist of? describe

8.
the brain is an important part of the body
because:
it controls the body’s functions
sends and receives messages from the nerve
both are correct
neither is correct
what part of the body protects the brain?
ribcage
spine
forehead
skull
where is the spinal cord located?
in the spine
in the brain
in the nucleus
in the axon terminal

nerve impuls is a very electrical current.

Explanation:

The problem is about the nervous system, which falls under Biology (a subfield of Natural Science). For question 4 (organs of CNS and definitions):

• Cerebrum: rounded, two cerebral hemispheres.
• Cerebellum: has folds, coordinates voluntary movements.
• Spinal Cord: protected by spinal column, extends to body.
• Brainstem: connects brain (cerebrum, cerebellum) to spinal cord.
• Peripheral Nerves: connect CNS to rest of organism (though CNS is brain and spinal cord, this connects them to body).

For question 5: Nervous system functions are sensory (receive stimuli), information processing (integrate), motor (respond). Stimuli activate senses (e.g., sounds, taste, touch, pressure, vibration, cold).

For question 6: Stimuli are events/objects activating senses (first option). Nervous system responses are reactions to stimuli (second option). Voluntary actions originate in cerebrum.

For question 7: Neuron consists of soma (cell body with nucleus), dendrites (receive signals), axon (transmits, with myelin sheath), axon terminals (send to next neuron). Nerve impulse is a weak electrical current.

For question 8: Brain controls body functions and sends/receives messages (both correct). Skull protects brain. Spinal cord is in the spine.

Answer:

Question 4 (Matching):

• Cerebrum: rounded shape, two symmetrical halves called cerebral hemispheres
• Cerebellum: has many folds and coordinates our voluntary movements
• Spinal Cord: protected by the spinal column, starts here and extends to all parts of the body
• Brainstem: connect the brain and the cerebellum to the spinal cord
• Peripheral Nerves: connect the CNS to the rest of the organism

Question 5 (Filling):

• Sensory: receive (stimuli)
• Information: processing (integrate stimuli)
• Motor: response (act on stimuli)
• Blanks: senses (The world around us continuously stimulates our senses), stimuli (These stimuli come in different varieties...), e.g., (as: e.g., sounds, e.g., taste, and e.g., touch, e.g., pressure, vibration, e.g., cold etc.)

Question 6 (Multiple Choice):

• What are stimuli? → They are events or objects that activate the senses
• What are nervous system responses? → They are reactions of the nervous system to stimuli
• Voluntary actions originate in: Cerebrum

Question 7 (Neuron Structure):

• Neuron parts:
• Dendrites (receive signals)
• Soma (cell body, contains nucleus)
• Axon (transmits signals, may have myelin sheath)
• Axon Terminals (send signals to next neuron)
• Nerve Impulse: weak (electrical current)

Question 8 (Multiple Choice):

• Brain importance: both are correct (it controls the body’s functions; sends and receives messages from the nerve)
• Protects the brain: skull
• Spinal cord location: in the spine