L2 Gym - Nervous system

What is the primary role of the nervous system?

• To digest food

• To maintain a constant balance of the internal environment

• To circulate blood

• To produce hormones

Which of the following is NOT a function of the nervous system?

• Gather information

• Analyze information

• Respond to information

• Produce red blood cells

What type of receptors detect changes in blood pressure?

• Proprioceptors

• Chemoreceptors

• Baroreceptors

• Thermoreceptors

What does the central nervous system (CNS) consist of?

• Brain and heart

• Brain and spinal cord

• Spinal cord and muscles

• Heart and lungs

Which system works closely with the nervous system to maintain homeostasis?

• Digestive system

• Endocrine system

• Respiratory system

• Circulatory system

Which part of the nervous system is responsible for involuntary functions like digestion and heart rate?

• Somatic system

• Autonomic system

• Central nervous system

• Sensory neurons

What is the role of sensory neurons?

• Transmit impulses from the CNS to muscles

• Carry messages to the CNS from sensory organs

• Control voluntary movement

• Secrete hormones

What is the function of the cell body in a neuron?

• It stores the cell's genetic information.

• It directs the activities of the neuron.

• It insulates the axon.

• It transmits messages away from the cell body.

What is the role of the myelin sheath in a neuron?

• It stores the cell's genetic information.

• It directs the activities of the neuron.

• It insulates the axon to speed up message transport.

• It picks up impulses and transmits them to the cell body.

What is the 'all or none' law in motor unit recruitment?

• All motor units in the body contract simultaneously.

• Only some muscle fibers in a motor unit contract.

• A motor unit activates all its fibers or none at all.

• The entire muscle contracts when stimulated.