Human Physiology Midterm 1 practice

Choose the statement that correctly describes the structure or function of dendrites. Select one:

Which is correct about sensory neurons?

Which division of the nervous system innervates involuntary effectors?

Which type of cell lines the ventricles of the brain and help produce cerebrospinal fluid?

The membrane of resting nerve cells is more permeable to ________ ions than ________ ions.

During an action potential ________.

The period of time when Na+ channels are recovering from their inactive state and K+ channels are still open is the ________.

Which is correct about chemical synapses?

Neurotransmitter release would be inhibited by ________.

Damage to the temporal lobe of the cerebrum would have the greatest impact on ________.

An electroencephalogram obtained from an adult who is thinking would probably display many ________ waves.

In most most individuals, writing skills would be impaired if damage to the ________ occurred.

Which type of receptor responds to physical deformation of its cell membrane?

The least amount of energy that produces adequate stimulation of a receptor is the ________.

As the magnitude of a generator potential increases the ________ of action potentials in the sensory neuron increases.

Proprioception and pressure impulses are carried by large, ________ neurons in the ________ columns of the spinal cord and are ________.

The ________ fibers are thin myelinated axons that carry sensations of heat, cold, and pain to the spinal cord.

How many neurons conduct sensory impulses from the periphery to the postcentral gyrus?

Sensations are sharpened via ________.

The potential produced by sensory receptors is called a ________.

If damage to the ________ tract was sustained, an individual may lose the ability to perceive ________ in the area corresponding to that spinal level.

As ________ increases, the two-point threshold decreases.

What characteristic does the endolymph of the membranous labyrinth have that is unusual for an extracellular fluid?

The softest sound that could be heard would have an intensity of ________.

Vibrations in the stapes directly induce vibrations in the ________.

The scala vestibuli of the cochlea is filled with ________.

The bending of the stereocilia of the organ of Corti opens membrane channels that are permeable to mainly ________, which causes depolarization.

Which of the following is NOT part of the organ of Corti?

Sensorineural deafness can be caused by all of the following EXCEPT ________.

Sympathetic stimulation is responsible for pupil ________ in ________ light.

When viewing an object far away, the ciliary muscle will ________, the suspensory ligament will ________, and the lens will become more ________.

What area of the retina has no photoreceptors?

Light is refracted the most by the ________.

A patient diagnosed with hyperopia stands 20 feet away from the eye chart. Without corrective lenses, the images on the chart ________.

Damage to the postcentral gyrus of the central fissure may interfere with ________.

The optic nerve is formed from fibers of ________.

The prime mover of any skeletal movement is called the ________.

Each fascicle of a muscle is surrounded by ________.

Increased motor unit recruitment causes ________ force generation by a muscle.

Each somatic motor neuron with all the muscle fibers it innervates is a ________.

Subunits of skeletal muscle fibers that are composed of sarcomeres are called ________.

Myosin contains binding sites for ________ and ________.

The movement of the troponin-tropomyosin complex requires ________.

What structures carry the action potentials into the interior of the muscle to cause muscle contraction?

The series-elastic component of contraction ________.

What is the first structure of a reflex arc?

Most corticospinal tracts decussate in the ________.

The inability to reach out and touch an object with control and accuracy may result from damage to the ________.

Which of the following is NOT required to coordinate movement?

Damage to the lower motor neurons would result in ________.

Myasthenia Gravis is a disease characterized by the production of antibodies against nicotinic acetylcholine receptors, resulting in a decreased number of functioning receptors at motor end plates. Which kind of drug would most likely help with the symptoms of Myasthenia Gravis?

Excitation of the Golgi tendon organ normally causes ________.

In single-unit smooth muscle, ________.

Calcium that is needed to activate cross-bridging in smooth muscle mainly comes from ________.

Cardiac action potentials usually originate in ________ cells.