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Bio 161 Psu Exam 3 Review!!! Questions And Answers With Verified Solutions Already Passed!!!
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Bio 161 Psu Exam 3 Review!!! Questions And Answers With Verified Solutions Already Passed!!!
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Bio 161 Psu Exam 3 Review!!! QuestionsAnd Answers With Verified Solutions
Already Passed!!!
classes of afferent neurons - ANSWER✔✔ Somatic, Visceral, Special Senses
Classes of Efferent neurons - ANSWER✔✔ somatic and visceral
CNS (central nervous system) - ANSWER✔✔ location of interneurons
Types of Sensory Cells in Epidermis - ANSWER✔✔ Merkel cells, nerve endings
and dermal receptors
Proprioceptors - ANSWER✔✔ Sensory receptors, located in the muscles and
joints, that provide information about body position and movement.
why are some places more sensitive than others? - ANSWER✔✔ density of
sensory neurons vary over different tissues. The more sensory neurons, the more
space in the brain required to integrate signals
somatic motor system - ANSWER✔✔ One efferent neuron extends from the CNS
to skeletal muscle
Axons are well myelinated, conduct impulses rapidly. Controls voluntary
movement
autonomic nervous system - ANSWER✔✔ A subdivision of the peripheral
nervous system. Controls involuntary activity of visceral muscles and internal
organs and glands.- Medulla and Pons
2 divisions of the autonomic nervous system - ANSWER✔✔ sympathetic and
parasympathetic
sympathetic nervous system - ANSWER✔✔ the division of the autonomic nervous
system that arouses the body, mobilizing its energy in stressful situations- Fight or
flight
, parasympathetic nervous system - ANSWER✔✔ the division of the autonomic
nervous system that calms the body, conserving its energy- rest and digest
where do pre-ganglionic efferent parasympathetic nervous system neurons
originate? - ANSWER✔✔ the cervical and sacral regions of the spine- ganglion far
from the spine
where do sympathetic neurons originate? - ANSWER✔✔ the thoracic region of the
spine- ganglion close to the spine
visceral motor - ANSWER✔✔ smooth muscle, cardiac muscle, glands- ex. blood
pressure
somatic motor - ANSWER✔✔ signal is straight to the muscles
how do tears drain from the eyes? - ANSWER✔✔ via the nasolacrimal duct into
the nasal cavity
lacrimal gland - ANSWER✔✔ secretes tears, exocrine gland
3 layers of the eye - ANSWER✔✔ tunica fibrosa, tunica vasculosa, tunica nervosa
tunica fibrosa - ANSWER✔✔ outer layer of the eye- includes sclera and cornea
what is the sclera and cornea made up of? - ANSWER✔✔ dense irregular
connective tissue that is avascular
conjunctiva - ANSWER✔✔ mucous membrane that lines the eyelids and outer
surface of the eyeball- located in tunica fibrosa and is vascular stratified epithelium
choroid - ANSWER✔✔ dark colored middle vascular layer of the eye, between the
retina and the sclera- absorbs extra light as it enters the eye. Contains melanocytes.
Provides nutrients to surrounding eye tissue
ciliary body - ANSWER✔✔ connected to the lens and helps control contractions to
change lens and focus light. Epithelium on this produces aqueous humor. main part
is made of smooth muscle
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