Nervous System: Structure and Function

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Which of the following tissues completely surrounds the brain and spinal cord?

Pia mater

Cerebrospinal fluid

Dura mater

Meninges (correct)

What is the potential space between the dura and arachnoid mater called?

Subarachnoid space

Cerebrospinal space

Subdural space (correct)

Epidural space

What is the function of the epidural space?

To enclose the filum terminale

To fuse with the periosteum of coccyx

To drain venous blood from the brain

To allow nerves to pass through (correct)

Which of the following is NOT a function of the dura mater?

To produce cerebrospinal fluid (A) Signup and view all the answers

What is the purpose of the tentorium cerebelli?

To separate the cerebrum and cerebellum (C) Signup and view all the answers

What is the arachnoid mater separated from the pia mater by?

Subarachnoid space (A) Signup and view all the answers

What is the pia mater adhered to?

Brain (A) Signup and view all the answers

What is the extension of the inner layer of dura mater that fuses with the periosteum of coccyx?

Spinal dura mater (B) Signup and view all the answers

What is the main function of the perineurium?

To surround and protect each individual nerve fiber (C) Signup and view all the answers

What term is used to describe groups of cell bodies in the central nervous system?

Nuclei (D) Signup and view all the answers

Which component of the reflex arc is responsible for analyzing sensory impulses?

Reflex center (D) Signup and view all the answers

Which term refers to the space between two neurons where the nerve impulse is transmitted?

Synaptic cleft (A) Signup and view all the answers

Which component is responsible for carrying sensory impulses towards the central nervous system?

Afferent neuron (C) Signup and view all the answers

What is the role of neurotransmitters in the nervous system?

To transmit nerve impulses across the synaptic cleft (D) Signup and view all the answers

Which structure is not directly involved in the reflex arc?

Synapse (A) Signup and view all the answers

What is the function of the epineurium?

To enclose and protect bundles of nerve fibers (C) Signup and view all the answers

What is the primary role of dendrites in a neuron?

To carry impulses towards the cell body (C) Signup and view all the answers

Which structure in the cell body is responsible for the production of ribosomes?

Nucleolus (A) Signup and view all the answers

What are Nissl bodies composed of?

Ribonucleic proteins and iron (B) Signup and view all the answers

Which substance is notably absent in the structure of an axon?

Nissl bodies (B) Signup and view all the answers

Which feature is unique to the cell body in neurons?

Presence of Nissl bodies (C) Signup and view all the answers

What is the approximate maximum length of an axon?

100 cm (B) Signup and view all the answers

What role do Nissl bodies play in nerve impulse conduction?

Accelerating metabolic activity by releasing iron (D) Signup and view all the answers

What does the centrosome in a neuron's cell body do?

Forms microtubules (B) Signup and view all the answers