Question 1

Which of the following best describes the difference between somatic and autonomic reflexes?

Accepted Answer

Somatic reflexes control skeletal muscle, while autonomic reflexes control smooth muscle, cardiac muscle, glands, and adipose tissue.

Question 2

A patient presents with abnormal movements and speech difficulties. Which neural structure is most likely affected, and what neurotransmitter is deficient?

Accepted Answer

Basal ganglia; dopamine

Question 3

Which of the following is TRUE regarding the stretch reflex?

Accepted Answer

It is a monosynaptic reflex initiated by muscle spindle stretch receptors.

Question 4

During the patellar tendon (knee jerk) reflex, which process ensures that the antagonistic muscle relaxes as the quadriceps contracts?

Accepted Answer

Reciprocal inhibition

Question 5

Which of the following best explains the function of Golgi tendon organs?

Accepted Answer

They encode signals about muscle tension and help prevent muscle damage from excessive force.

Question 6

A rhythmic movement such as walking is primarily controlled by which neural mechanism?

Accepted Answer

Central pattern generators (CPGs) in the spinal cord

Question 7

Which equation best represents the relationship between force ($$F$$), muscle tension ($$T$$), and area ($$A) in $$the context of muscle contraction?

Accepted Answer

$$T = \frac{F}{A}$$

Question 8

Which of the following is a characteristic of polysynaptic reflexes?

Accepted Answer

They can include one or more interneurons between the afferent and efferent neurons.

Question 9

A person quickly withdraws their hand after touching a hot stove. Which reflex pathway is primarily responsible for this response?

Accepted Answer

Flexion (withdrawal) reflex

Question 10

Which of the following statements about alpha-gamma coactivation is correct?

Accepted Answer

Simultaneous activation of alpha and gamma motor neurons maintains spindle sensitivity during muscle contraction.

Question 11

Which of the following best describes the role of the limbic system in autonomic reflexes?

Accepted Answer

It acts as the 'visceral brain,' linking emotional stimuli to visceral responses.

Question 12

Which type of movement is most complex and requires integration in the cerebral cortex?

Accepted Answer

Voluntary movement

Question 13

Which of the following is TRUE regarding feedforward and feedback reflexes in postural control?

Accepted Answer

Feedforward reflexes prepare the body for anticipated postural disturbances, while feedback reflexes respond to unanticipated disturbances.

Question 14

Which of the following is NOT a location where proprioceptors are found?

Accepted Answer

Adipose tissue

Question 15

Which equation best describes the relationship between neural input ($$I$$), muscle contraction force ($$F$$), and muscle length change ($$\Delta L) in a $$stretch reflex?

Accepted Answer

$$F = I 	imes \Delta L$$

Question 16

Which of the following is a function of central pattern generators (CPGs)?

Accepted Answer

They generate rhythmic movements such as walking and breathing.

Question 17

Which of the following is TRUE about pacemaker cells in visceral muscle?

Accepted Answer

They spontaneously depolarize and can be modulated by hormones or the autonomic nervous system.

Question 18

Which pathway is responsible for transmitting voluntary motor commands from the cerebral cortex to the spinal cord?

Accepted Answer

Corticospinal tract

Question 19

Which of the following best describes the difference between innate and learned reflexes?

Accepted Answer

Innate reflexes are genetically determined, while learned reflexes (conditioned) are acquired through experience.

Question 20

Which of the following is a correct sequence for the integration of a skeletal muscle reflex?

Accepted Answer

Proprioceptor → sensory neuron → CNS integration → alpha motor neuron → extrafusal muscle fiber

Integrative Physiology: Control of Body Movement (Chapter 13 Study Notes)

Guida di studio - Domande di pratica

Study guide - Flashcard