Q: Which equation best represents the reduction in effective brain weight due to CSF buoyancy, given that the brain weighs about $$1500\ \mathrm{g}$$ and CSF reduces its effective weight by 97%?

$$1500\ \mathrm{g} \times 0.03 = 45\ \mathrm{g}$$

Q: Which equation would you use to calculate the percentage of blood supply the brain receives if it gets $$750\ \mathrm{mL/min}$$ and the total cardiac output is $$5000\ \mathrm{mL/min}$$?

$$\frac{750}{5000} \times 100 = 15\%$$

Question 1

Which of the following structures is responsible for producing cerebrospinal fluid (CSF) in the brain?

Accepted Answer

Choroid plexus

Question 2

A patient suffers a stroke that interrupts blood flow to the brain for 5 minutes. What is the most likely consequence?

Accepted Answer

Irreversible brain damage

Question 3

Which lobe of the cerebrum is primarily responsible for voluntary motor functions, motivation, and social judgment?

Accepted Answer

Frontal lobe

Question 4

The blood-brain barrier (BBB) is highly permeable to which of the following substances?

Accepted Answer

Lipid-soluble substances such as alcohol and anesthetics

Question 5

Which equation best represents the reduction in effective brain weight due to CSF buoyancy, given that the brain weighs about $$1500\ \mathrm{g}$$ and CSF reduces its effective weight by 97%?

Accepted Answer

$$1500\ \mathrm{g} 	imes 0.03 = 45\ \mathrm{g}$$

Question 6

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

Accepted Answer

Primary processing of visual information

Question 7

A lesion in the postcentral gyrus of the parietal lobe would most likely result in impairment of which function?

Accepted Answer

General sensory perception

Question 8

Which of the following statements about gray and white matter in the brain is correct?

Accepted Answer

Gray matter contains neuron cell bodies and forms nuclei deep within white matter

Question 9

Which tract type in the cerebral white matter connects the left and right hemispheres?

Accepted Answer

Commissural tracts

Question 10

A patient presents with difficulty initiating and planning movements, as well as muscle coordination problems. Which brain structure is most likely affected?

Accepted Answer

Basal nuclei

Question 11

Which meningeal layer is the innermost and directly adheres to the surface of the brain and spinal cord?

Accepted Answer

Pia mater

Question 12

Which of the following best describes the function of the thalamus?

Accepted Answer

Acts as a relay station for sensory input to the cerebral cortex

Question 13

Which lobe of the cerebrum contains the primary visual cortex?

Accepted Answer

Occipital lobe

Question 14

If a patient has damage to the left precentral gyrus, which side of the body will most likely be affected?

Accepted Answer

Right side

Question 15

Which of the following is a function of the limbic system?

Accepted Answer

Processing of emotion, learning, and memory

Question 16

Which equation would you use to calculate the percentage of blood supply the brain receives if it gets $$750\ \mathrm{mL/min}$$ and the total cardiac output is $$5000\ \mathrm{mL/min}$$?

Accepted Answer

$$\frac{750}{5000} 	imes 100 = 15\%$$

Question 17

Which of the following is TRUE regarding the sensory homunculus?

Accepted Answer

The size of cortex dedicated to a body part is proportional to its sensitivity

Question 18

Which structure connects the two cerebral hemispheres?

Accepted Answer

Corpus callosum

Question 19

Which of the following is a function of cerebrospinal fluid (CSF)?

Accepted Answer

Provides buoyancy, protection, and chemical stability for the brain

Question 20

Which part of the diencephalon is responsible for producing melatonin?

Accepted Answer

Pineal gland

Central Nervous System: Structure and Development

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