Q: Which equation best represents the relationship between the number of spinal nerves and spinal cord segments?

$$N_{spinal\ nerves} = N_{segments} \times 2$$

Question 1

Which structure anchors the spinal cord to the coccyx, providing longitudinal stability?

Accepted Answer

Filum terminale

Question 2

A lumbar puncture is typically performed between L3 and L4 vertebrae. Why is this site chosen?

Accepted Answer

It avoids damaging the conus medullaris, which ends at L1 or L2.

Question 3

Which of the following best describes the function of the spinal meninges?

Accepted Answer

They prevent nervous tissue from abrasion and trauma.

Question 4

Damage to the ventral roots of the spinal cord results in:

Accepted Answer

Loss of motor function (paralysis)

Question 5

Which equation best represents the relationship between the number of spinal nerves and spinal cord segments?

Accepted Answer

$$N_{spinal\ nerves} = N_{segments} 	imes 2$$

Question 6

Which of the following is NOT a function of the hypothalamus?

Accepted Answer

Controlling voluntary muscle movement

Question 7

A patient presents with flaccid paralysis after a spinal cord injury. Which of the following best explains this condition?

Accepted Answer

Severe damage to ventral roots, resulting in no voluntary or involuntary control and muscle atrophy

Question 8

Which brain region acts as a relay station for sensory information ascending to the cortex?

Accepted Answer

Thalamus

Question 9

Which of the following best explains why scents often trigger strong, vivid memories?

Accepted Answer

All of the above

Question 10

Which of the following is a function of the medulla oblongata?

Accepted Answer

Regulating heart rate and blood vessel diameter

Question 11

Which equation describes the relationship between CSF volume ($$V_{CSF}$$), brain mass ($$M_{brain}$$), and buoyancy ($$B) $$provided to the brain?

Accepted Answer

$$B = \frac{V_{CSF}}{M_{brain}}$$

Question 12

Which structure is responsible for connecting the two cerebral hemispheres?

Accepted Answer

Corpus callosum

Question 13

Which of the following is TRUE regarding the blood-brain barrier?

Accepted Answer

It is absent in the hypothalamus and brain stem.

Question 14

Which area of the cerebral cortex is primarily responsible for voluntary motor initiation?

Accepted Answer

Primary motor cortex

Question 15

A patient with a spinal cord transection at the cervical region would most likely experience:

Accepted Answer

Quadriplegia

Question 16

Which of the following best describes the function of the reticular activating system (RAS)?

Accepted Answer

It filters out repetitive, familiar, or weak stimuli.

Question 17

Which equation best represents the relationship between the number of neurons in the cerebellum ($$N_{cerebellum}) $$and the total number of neurons in the brain ($$N_{total}$$)?

Accepted Answer

$$N_{cerebellum} = 0.5 	imes N_{total}$$

Question 18

Which of the following is a function of the basal nuclei?

Accepted Answer

Regulating intensity of slow or stereotyped movements

Question 19

Which of the following is TRUE regarding the organization of gray and white matter in the spinal cord?

Accepted Answer

Gray matter is located in the core, white matter outside

E2 Lecture 5: Central Nervous System (CNS)

Guida di studio - Domande di pratica

Study guide - Flashcard