Nervous System

As organisms get more complex, cells become specialized to perform specific functions in the body. What is the function for the cell shown?

• contract and shorten movement

• provide coverage and protection

• carry impulses around the body

• connects parts together

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The human brain is made of 100 billion neurons. Each neuron has a nucleus that contains genes. Many neurons bind together to form a nerve.

• tissue

• system

• organ

• cell

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Which cell relays messages from one tissue to another?

• Red Blood Cell-RBC

• White Blood Cell-WBC

• Neuron

• Tissue

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Neurons are primarily composed of this cell?

• heart

• skin

• brain

• skull

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What level of structure is represented by the diagram?

• organ

• organ system

• cell

• tissue

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The function of sneezing is to expel mucus containing foreign particles from the nasal cavity. A person sneezes when foreign particles pass through the nasal hair which triggers the release of chemical that activates body system causing sneezing. What body part is activated?

• circulatory system

• digestive system

• nervous system

• excretory system

Humans feel hungry when their empty stomachs contract and glucose levels in their body drop. Both of the situations stimulate neurons that send messages to the brain which are interpreted as hunger. What body systems are involved in this process as described?

• digestive, muscular, integumentary, and respiratory

• digestive, excretory, integumentary, and skeletal

• circulatory, excretory, nervous, and skeletal

• circulatory, digestive, muscular, and nervous

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Which system is responsible for the overall control of all the internal processes that occur in the body?

• muscular system

• nervous system

• digestive system

• skeletal system

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The urinary bladder is a muscular organ of the excretory system that collects urine excreted by the kidney. How does the nervous system help the urinary system in excretion?

• it signals the urinary bladder to absorb more water from the urine.

• It signals the urinary system to collect waste from the different parts of the body.

• It signals the urinary bladder to hold and release urine at appropriate times.

• It signals the urinary bladder to allow more urine to flow from the ureters.

The brain has 3 major sections that send and receive signals to control all the activities that keep a person functioning efficiently. Which major section controls breathing and heart beat?

• cerebellum

• cerebrum

• brain stem

• cortex