Anatomy and Physiology Nervous System 2 — Questions and Answers
Question 1: Which division of the autonomic nervous system prepares the body for 'fight or flight' responses?
- Sympathetic (Correct answer)
- Parasympathetic
- Somatic
- Enteric
Correct answer: Sympathetic
The sympathetic division of the ANS activates the fight-or-flight response, increasing heart rate, dilating bronchioles, and redirecting blood to muscles.
Question 2: What is the name of the fluid-filled cavities within the brain?
- Ventricles (Correct answer)
- Sulci
- Gyri
- Fissures
Correct answer: Ventricles
The brain's four ventricles are fluid-filled chambers that produce and circulate cerebrospinal fluid (CSF) throughout the CNS.
Question 3: Which lobe of the cerebral cortex is responsible for processing visual information?
- Occipital lobe (Correct answer)
- Frontal lobe
- Parietal lobe
- Temporal lobe
Correct answer: Occipital lobe
The occipital lobe, located at the posterior of the cerebrum, contains the primary visual cortex and processes all visual information.
Question 4: What is the term for the period after an action potential during which a neuron cannot fire again?
- Refractory period (Correct answer)
- Threshold period
- Depolarization
- Hyperpolarization
Correct answer: Refractory period
The refractory period is the time following an action potential when a neuron is unable to generate another action potential due to ion channel states.
Question 5: Which structure connects the left and right cerebral hemispheres?
- Corpus callosum (Correct answer)
- Thalamus
- Hypothalamus
- Brainstem
Correct answer: Corpus callosum
The corpus callosum is a large band of white matter containing nerve fibers that connects and facilitates communication between the two cerebral hemispheres.
Question 6: What are the three layers of protective membranes surrounding the brain and spinal cord called collectively?
- Meninges (Correct answer)
- Ventricles
- Dura mater
- Pia mater
Correct answer: Meninges
The meninges are three protective membranes—the dura mater, arachnoid mater, and pia mater—that surround and protect the brain and spinal cord.
Anatomy and Physiology Nervous System 2
Which division of the autonomic nervous system prepares the body for 'fight or flight' responses?