Q: Which equation best represents the calculation of membrane potential using ion concentrations?

$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right)$$

Question 1

Which of the following muscles is primarily responsible for flexing the forearm at the elbow, and to which functional group does it belong?

Accepted Answer

Biceps brachii; agonist

Question 2

Which structural component of skeletal muscle is directly responsible for the contraction of muscle fibers?

Accepted Answer

Myofibrils

Question 3

A patient presents with loss of sensation and motor function in the lower limbs. Which region of the spinal cord is most likely affected?

Accepted Answer

Lumbar region

Question 4

Which cell type in nervous tissue is primarily responsible for forming the myelin sheath in the central nervous system?

Accepted Answer

Oligodendrocytes

Question 5

A motor neuron can be classified structurally as which type of neuron?

Accepted Answer

Multipolar neuron

Question 6

At the synapse, which event occurs immediately after the arrival of an action potential at the presynaptic terminal?

Accepted Answer

Calcium ions enter the presynaptic terminal

Question 7

Which equation best represents the calculation of membrane potential using ion concentrations?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight)$$

Question 8

Which of the following best describes the function of the dorsal horn of the spinal cord?

Accepted Answer

Receives sensory information from the body

Question 9

Which nerve plexus is responsible for innervating the upper limb, and which major nerve arises from it?

Accepted Answer

Brachial plexus; median nerve

Question 10

During embryological development, which structure gives rise to the cerebral hemispheres?

Accepted Answer

Telencephalon

Question 11

A patient is unable to move their facial muscles and cannot taste on the anterior two-thirds of their tongue. Which cranial nerve is most likely damaged?

Accepted Answer

Facial nerve (VII)

Question 12

Which of the following is a unique feature of the sympathetic nervous system compared to the parasympathetic nervous system?

Accepted Answer

Preganglionic neurons are shorter

Question 13

Which equation best represents the calculation of cardiac output, a concept relevant to autonomic nervous system regulation?

Accepted Answer

$$CO = HR 	imes SV$$

Question 14

Which special sense is mediated by the organ of Corti, and where is it located?

Accepted Answer

Hearing; cochlea

Question 15

A patient with sensorineural deafness would most likely have damage to which structure?

Accepted Answer

Hair cells in the cochlea

Question 16

Which equation best represents the calculation of the refractive power of the eye's lens?

Accepted Answer

$$P = \frac{1}{f}$$

Question 17

Which of the following best describes the function of the meninges surrounding the brain and spinal cord?

Accepted Answer

Protection and support of the central nervous system

Question 18

Which tract of the spinal cord is responsible for transmitting pain and temperature sensations to the brain?

Accepted Answer

Spinothalamic tract

Question 19

A patient presents with loss of motor function in the right hand. Which region of the brain is most likely damaged?

Accepted Answer

Left primary motor cortex

Question 20

Which structural feature distinguishes a spinal nerve from a cranial nerve?

Accepted Answer

Spinal nerves are formed by the union of dorsal and ventral roots

Muscles, Nervous System, and Special Senses: ANP Study Guide

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