Question 1

Which of the following best describes the process of signal transduction in a sensory receptor?

Accepted Answer

The conversion of a receptor potential into an action potential.

Question 2

A patient is unable to distinguish between two closely spaced points on their back, but can easily do so on their fingertips. Which of the following best explains this phenomenon?

Accepted Answer

The receptive fields on the back are larger, resulting in lower acuity.

Question 3

Which type of sensory receptor is responsible for detecting changes in muscle tension and is classified as a proprioceptor?

Accepted Answer

Golgi tendon organ

Question 4

Which of the following statements about action potentials in sensory neurons is correct?

Accepted Answer

The magnitude (amplitude) of action potentials is always constant, but their frequency increases with stimulus intensity.

Question 5

A patient experiences pain in their left arm during a heart attack. This is an example of:

Accepted Answer

Referred pain

Question 6

Which pathway carries sensations of highly localized (fine) touch, pressure, vibration, and proprioception to the primary somatosensory cortex?

Accepted Answer

Posterior column–medial lemniscus pathway

Question 7

Which of the following best describes the function of phasic receptors?

Accepted Answer

They adapt quickly to a constant stimulus and stop signaling.

Question 8

A person is exposed to a constant odor, but after a few minutes, they no longer notice it. Which type of receptor is primarily responsible for this adaptation?

Accepted Answer

Phasic receptor

Question 9

Which of the following is NOT a general sense?

Accepted Answer

Vision

Question 10

Which of the following best explains why the CNS can distinguish between different types of sensory stimuli (modality)?

Accepted Answer

Different types of sensory neurons and specific regions of the cortex are activated for each modality.

Question 11

Which of the following tactile receptors is most sensitive to deep pressure and high-frequency vibration?

Accepted Answer

Lamellar (Pacinian) corpuscle

Question 12

A patient with damage to the lateral spinothalamic tract would most likely have difficulty perceiving which sensations?

Accepted Answer

Pain and temperature

Question 13

Which of the following is true regarding the organization of the somatic sensory pathways?

Accepted Answer

The second-order neuron crosses to the opposite side of the CNS before reaching the thalamus.

Question 14

Which of the following best describes the function of baroreceptors in the body?

Accepted Answer

They provide information about pressure changes in organs such as the heart, lungs, and bladder.

Question 15

A person is learning to play the piano and gradually improves their finger movements over time. Which brain structures are primarily responsible for this fine-tuning of complex movements?

Accepted Answer

Basal nuclei and cerebellum

Question 16

Which of the following equations correctly represents the relationship between stimulus intensity and action potential frequency?

Accepted Answer

$$f = k \cdot I$$

Question 17

Which of the following is a correct statement about proprioceptors?

Accepted Answer

They are not found in visceral organs of the thoracic and abdominopelvic cavities.

Question 18

Which of the following best describes the function of the corticospinal (pyramidal) pathway?

Accepted Answer

It provides voluntary control over skeletal muscles.

Question 19

A patient reports a tingling sensation in their fingers after hitting their 'funny bone.' This sensation is best explained by:

Accepted Answer

Indirect sensory stimulation of a sensory neuron between the receptor ending and the spinal cord.

Question 20

Which of the following is true regarding the spinocerebellar pathway?

Accepted Answer

It carries proprioceptive information to the cerebellum, with some axons crossing and others not crossing the spinal cord.

Sensory Pathways and the Somatic Nervous System: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard