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Nervous System Components

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Questions and Answers

What is the primary function of afferent neurons in the nervous system?

To transmit signals from the CNS to skeletal muscles

To innervate smooth muscle, cardiac muscle, and glands

To carry signals from sensory receptors to the CNS (correct)

To generate action potentials in the brain

What is the main function of the cerebrospinal fluid (CSF) in the CNS?

To regulate body temperature

To provide mechanical protection to the brain and spinal cord

To provide nutrients to the brain

To absorb shock and prevent brain damage (correct)

Which type of neuron is affected in Parkinson's disease?

Glial cells in the thalamus

Motor neurons in the substantia nigra (correct)

Sensory neurons in the hippocampus

Cerebellar neurons in the parietal lobe

What is the name of the layer of meninges that adheres to the surface of the brain?

Pia mater Signup and view all the answers

What is the approximate weight of the brain in an adult human?

1.5 kg Signup and view all the answers

What is the main consequence of spinal cord injury in the cervical region?

Quadriplegia Signup and view all the answers

Which part of the CNS is primarily responsible for generating action potentials?

Neurons Signup and view all the answers

What is the primary function of the autonomic nervous system?

Regulation of smooth muscle, cardiac muscle, and glands Signup and view all the answers

What is the consequence of a spinal cord injury at the C1-C2 level?

Loss of involuntary functions, including breathing Signup and view all the answers

Which type of neuron is responsible for transmitting signals from the CNS to skeletal muscles?

Somatic neuron Signup and view all the answers

What is the primary function of the blood-brain barrier?

To restrict the passage of certain substances into the CNS Signup and view all the answers

Which disease is characterized by the selective loss of neurons in the substantia nigra?

Parkinson's disease Signup and view all the answers