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Muscle Spindle and Patellar Reflex Quiz

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Questions and Answers

What does the muscle spindle detect?

Magnitude of muscle contraction

Amount of oxygen in the muscle

Temperature changes in the muscle

Rate of change at which muscle fibers are stretched (correct)

In the patellar reflex, what is the sequence of events after the patellar tendon is stretched?

Ventral motor neuron releases Ach, then tendon stretches

Impulse travels to brain, then muscle contraction occurs

Activated muscle spindles excite associated axons, leading to muscle contraction (correct)

Muscle spindles deactivate, then signal the spinal cord

What is the approximate time it takes for an impulse to travel into the spinal cord during the stretch reflex?

1 second

10 milliseconds

1 millisecond (correct)

1 microsecond

Why do reflex responses often appear complex?

They can change depending on the task Signup and view all the answers

What happens when perturbation of one arm occurs during a task involving the contralateral limb?

Excitatory response in contralateral elbow extensor muscle and inhibitory response in contralateral hand muscles Signup and view all the answers

What do spinal reflexes involve?

Coordinated contractions of numerous muscles in the limbs Signup and view all the answers

Which of the following statements best describes how odors are detected in the nose?

By the specialized receptor cells in the olfactory epithelium Signup and view all the answers

What is meant by the 'signature' of an odorant?

The unique set of olfactory receptors it activates Signup and view all the answers

Why do we get cravings for salty foods?

Because salt is essential for our diet Signup and view all the answers

In taste perception, why are bitter and sour tastes often associated with aversive reactions?

Because bitter substances are often harmful and food going sour indicates spoilage Signup and view all the answers

What is unique about the way taste information is transmitted from taste buds to the cerebral cortex?

It is not processed by the thalamus Signup and view all the answers

Which part of the body has taste sensors and is described as the fastest healing part?

The tongue Signup and view all the answers