Quiz on the Nervous System

What part of the nervous system gathers, processes, and responds to information?

• Central Nervous System

• Peripheral Nervous System

• Autonomic Nervous System

• Somatic Nervous System

Answer explanation

The Central Nervous System (CNS) is responsible for gathering, processing, and responding to information. It includes the brain and spinal cord, which coordinate all activities and responses in the body.

Which type of neuron sends information from the brain to the muscles?

• Sensory neurons

• Motor neurons

• Reflex neurons

• Interneurons

Answer explanation

Motor neurons are responsible for transmitting signals from the brain to the muscles, enabling movement. In contrast, sensory neurons carry information to the brain, while interneurons connect different neurons.

Which part of the brain controls involuntary functions?

• Cerebrum

• Cerebellum

• Brain Stem

• Spinal Cord

Answer explanation

The brain stem controls involuntary functions such as breathing, heart rate, and blood pressure, making it essential for survival. The cerebrum and cerebellum are involved in voluntary movements and coordination, while the spinal cord transmits signals.

What is the main function of the cerebellum?

• Regulate heart rate

• Coordinate voluntary movements

• Process sensory information

• Control memory

Answer explanation

The cerebellum primarily coordinates voluntary movements, ensuring smooth and balanced motor activity. It does not regulate heart rate, process sensory information, or control memory.

What is a reflex?

• A part of the brain

• A voluntary action

• An automatic response to a stimulus

• A type of neuron

Answer explanation

A reflex is defined as an automatic response to a stimulus, meaning it occurs without conscious thought. This distinguishes it from voluntary actions, which require deliberate control.

What is the gap between two neurons called?

• Dendrite

• Synapse

• Axon

• Neuron

Answer explanation

The gap between two neurons is called a synapse. It is the site where neurotransmitters are released to transmit signals from one neuron to another, facilitating communication in the nervous system.

Which system controls skeletal muscles?

• Autonomic System

• Somatic System

• Peripheral Nervous System

• Central Nervous System

Answer explanation

The somatic system is responsible for controlling voluntary movements of skeletal muscles, allowing us to perform actions consciously. In contrast, the autonomic system regulates involuntary functions.

What is the loss of muscle function called?

• Neuron

• Stimulus

• Reflex

• Paralysis

Answer explanation

The loss of muscle function is referred to as paralysis. It occurs when there is a disruption in the signals between the brain and muscles, leading to a loss of movement or control.

Which type of cells gather information about the world around us? R_______ C____

Answer explanation

Receptor cells are specialized cells that gather sensory information from the environment, such as light, sound, and touch, allowing us to perceive the world around us.

Label the parts of the ear

a

b

c

d

eardrum

semicircular canals

anvil

cochlea