Exam 4 Chapter 15 & 16 The Senses

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In the ANS how many nerves are between the CNS and the organ?

2

Which of the following is characteristic of a sympathetic nervous system response?

Emergency situations, where the body needs a sudden burst of energy. Increases cardiac output and pulmonary ventilation. Routes blood to the muscles. Raises blood glucose. Slows down digestion, kidney filtration and other functions not needed during emergencies.

Receptors responsible for the control of muscle contractions are

Golgi tendon organs

Which of the following is characteristic of a parasympathetic nervous system response?

Promotes normal maintenance of the body- acquiring building blocks and energy from food and getting rid of the wastes. Promotes secretions and mobility of different parts of the digestive tract. Is involved in urination, defecation. The vagus nerve (cranial number 10) is the chief parasympathetic nerve.

When a sense receptor is stimulated what happens?

Receptors generate an action potential. Sensory neurons in the peripheral nervous system carry the impulse to the central nervous system. The brain processes this information and makes a suitable response.

What is the neurotransmitter used between the postganlionic neuron and the organ in a parasympathetic synapse?

acetylcholine

What is the neurotransmitter used between the preganlionic neuron and the ganglion in the ANS?

acetylcholine in sypathetic and parasypathetic fibers

Decreased sensitivity to a continued stimulus is called

adaption

What organ, found on the superior organ of the kidney, may release both norepinephrine and epinephrine in emergency situations?

adrenal medulla

What is the specialized mechanoreceptor which detects pressure changes in the walls of blood vessels and in portions of the digestive, reproductive, and urinary tracts?

baroreceptors

What is the receptor type for smell?

chemoreceptors

Mechanoreceptors respond to

compression of receptors.

Which of the following are true of the autonomic nervous system?

coordinates involuntary functions of the body system allowing smooth coordinated body homeostasis may also be called the ANS

Pacinian corpuscles respond to

deep cutaneous pressure and vibration.

What is the receptor type that provides information about the external environment ?

exteroceptors

Which area of the brain is involved in the coordination of ANS responses?

hypothalmus

What is the receptor type that monitors visceral organs and functions for ?

interoceptors

What is the receptor type for touch?

mechanoreceptors

Specialized muscle fibers associated with detection of muscle length are

muscle spindles

What is the receptor sight for pain?

nociceptors

What is the neurotransmitter used between the postganlionic neuron and the organ in a sympathetic synapse?

norepinephrine

What is the receptor type for sight?

photoreceptors

Vision is dependent upon

photoreceptors.

The afferent division of the nervous system delivers somatic sensory information to the

primary sensory cortex of the cerebral hemispheres or appropriate areas of the cerebellar hemispheres.

The ability to localize the position of body parts is called

proprioception

What is the receptor type for proprioception ?

proprioceptor

The afferent division of the nervous system delivers visceral sensory information to the

reflex centers in the brain stem and diencephalon.

If an action potential from a sensory receptor receaches the cerebrum it may be called a

sensation

The body perceives and reacts to its environment through which body system?

sensory

The sensory system is divided into

special senses and general senses

What is the receptor type for temperature?

thermoreceptors


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