Exam (elaborations)
bio 251 exam 2 questions and answers-graded a
- Course
- Institution
bio 251 exam 2 questions and answers
[Show more]
Content preview
bio 251 exam 2 questions and answersWhich of the following is part of the autonomic nervous system?
a) parasympathetic nervous
b) sympathetic nervous system
c) somatic nervous system
d) bothaandb
e) all of the above - Answer- d
The part of the brain that is the critical link between the nervous and endocrine systems is
a) The brain stem
b) The cerebellum
c) The cerebral cortex
d) The hypothalamus
e) The basal nuclei - Answer- d
The cerebellum is involved in
a) coordination of voluntary muscle activity
b) coordination of slow sustained movement
c) crude awareness of sensation
d) all the above
e) bothaandb - Answer- a
Which of the following is most involved in generating emotions?
a) Brain stem
b) Cerebellum
c) Hypothalamus
d) Thalamus
e) Limbic system - Answer- e
Tight junctions between capillary endothelial cells in the central nervous system create the blood- brain barrier, thereby restricting the ________ molecules into the brain.
a) transcytosis of
b) active transport of
c) facilitated diffusion of hydrophobic
d) diffusion of hydrophilic
e) diffusion of lipophilic - Answer- d
Which of the following statements about simple spinal reflexes is true? a) The afferent neuron must synapse with an efferent neuron
b) Only excitatory neurons are used in reflex pathways
c) More than one efferent neuron can be activated as part of the reflex
d) Both a and b are true
e) Both b and c are true - Answer- c
Information from chemoreceptors on your tongue is sent to the CNS via
a) A visceral afferent
b) A sensory afferent
c) A somatosensory afferent
d) A sensory efferent
e) A visceral efferent - Answer- b
Conversion of stimulus energy into an action potential is called
a) Tonic response
b) Phasic response
c) Transduction
d) Receptor potential
e) Graded potential - Answer- c
9. Fast adapting (also called phasic) receptors
a) Show a decline in membrane potential as a stimulus continues
b) Show an increase in membrane potential as a stimulus continues
c) Continue to produce action potentials as a stimulus continue
d) Do not respond to stimuli
e) Both b and c are true - Answer- a
10. Which of the following is the best description of sweet taste bud receptor function?
a) Membrane receptors on sweet taste buds bind glucose or other sugars, which initiates a G protein
system, which ultimately causes K+ channels to close, which thereby hyperpolarizes the
membrane.
b) Membrane receptors on sweet taste buds bind glucose or other sugars, which closes the K+
channels, which ultimately initiates a G protein system, which thereby depolarizes the membrane.
c) Membrane receptors on sweet taste buds bind glucose or other sugars, which initiates a G protein system, which ultimately causes K+ channels to close, which thereby depolarizes the membrane.
d) Membrane receptors on sweet taste buds bind acids (H+), which initiates a G protein system, which ultimately causes K+ channels to close, which thereby depolarizes the membrane.
e) Membrane receptors on sweet taste buds bind glucose or other sugars, which hy - Answer- c
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ALVINK2022. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67163 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now