Nervous System Exam Review: Functions and Divisions

What is the primary function of the sensory division of the nervous system?

Transmitting impulses from the CNS to muscles and glands
Transmitting impulses from sensory receptors to the CNS (correct)
Activating effector organs to produce a response
Processing and interpreting sensory input

Which type of neuroglia is responsible for forming the myelin sheath around axons in the PNS?

Schwann cells (correct)
Astrocytes
Oligodendrocytes
Microglia

What is the primary function of the motor division of the nervous system?

Processing and interpreting sensory input
Transmitting impulses from the CNS to muscles and glands (correct)
Transmitting impulses from sensory receptors to the CNS
Gathering information from sensory receptors

Which part of the nervous system consists of the brain and spinal cord?

Central Nervous System (CNS) (A) Signup and view all the answers

What is the primary function of ependymal cells in the CNS?

Producing cerebrospinal fluid (CSF) (C) Signup and view all the answers

What is the second function of the nervous system?

Processing and interpreting sensory input (C) Signup and view all the answers

What is the main factor responsible for maintaining the resting membrane potential?

The unequal distribution of ions across the membrane (D) Signup and view all the answers

What is the function of voltage-gated sodium channels in action potential generation?

To allow sodium ions to rush into the cell (B) Signup and view all the answers

What is the primary function of the cerebellum?

Coordination and balance (B) Signup and view all the answers

What is the purpose of the synapse in neurons?

To allow communication between cells (B) Signup and view all the answers

Which region of the brain connects the cerebrum to the spinal cord?

Brainstem (A) Signup and view all the answers

Where is the third ventricle located in the brain?

In the diencephalon (B) Signup and view all the answers

Where does the CSF circulate through in the body?

Through the ventricles of the brain, the central canal of the spinal cord, and the subarachnoid space (B) Signup and view all the answers

What is the main difference between the gray and white matter in the spinal cord?

The gray matter contains cell bodies of neurons (C) Signup and view all the answers

What is the significance of the hands, lips, face, and tongue being overrepresented in the homunculus?

They are more sensitive and have more motor control (C) Signup and view all the answers

What is the location of the fourth ventricle?

Between the brainstem and cerebellum (A) Signup and view all the answers

What is the role of the cerebral cortex in terms of voluntary movement?

It initiates and coordinates voluntary movements by sending signals to the spinal cord and brainstem (C) Signup and view all the answers

What is the function of the association fibers?

Connect different parts of the same hemisphere (D) Signup and view all the answers

What is the peripheral nervous system (PNS) composed of?

Nerves and ganglia outside the CNS (D) Signup and view all the answers

What is the role of the hypothalamus?

Regulates homeostasis and endocrine function (B) Signup and view all the answers

How many pairs of cranial nerves are there?

12 (B) Signup and view all the answers

What is the function of the medulla oblongata?

Regulates breathing and heartbeat (A) Signup and view all the answers

What is the function of the cerebellum?

Involved in motor control and coordination (A) Signup and view all the answers

What is the function of the central sulcus?

Separates the frontal and parietal lobes (B) Signup and view all the answers

Which plexus is responsible for supplying muscles and skin of the shoulder, arm, and hand?

Brachial Plexus (D) Signup and view all the answers

What is the main function of the phrenic nerve arising from the Cervical Plexus?

Crucial for breathing (C) Signup and view all the answers

Which nerves form the Lumbar Plexus?

L1-L4 (D) Signup and view all the answers

Which plexus is responsible for innervating the neck, back of the head, and shoulder?

Cervical Plexus (D) Signup and view all the answers

What is the function of the Sacral Plexus in terms of lower limb movement?

Maintaining posture, balance, and lower limb movement (B) Signup and view all the answers

How are plexuses formed in the body?

By the branching and rejoining of peripheral nerves (C) Signup and view all the answers