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bio 163 exam 4 pre week and
worksheet wrap ups Questions with
complete solutions.
The structure where the nasal cavity and oral cavity connect at the back of the throat is
called the - CORRECT ANSWER -pharynx
It is normal for food to pass down the trachea. True
False - CORRECT ANSWER -false
The tiny air sacs at the end of the bronchioles are called - CORRECT ANSWER -
alveoli Pulmonary arteries carry ______________ blood deoxygenated
oxygenated - CORRECT ANSWER -deoxygenated
An increase in the volume of our lungs causes inhalation. True
False - CORRECT ANSWER -true
An increase in H+ leads to an ______________________ in CO2. increase
decrease - CORRECT ANSWER -increase
If we breath faster than normal, _____________________ protons will be present in our blood compared to normal more
fewer - CORRECT ANSWER -fewer
A high number on the pH scale indicates a ________________ of H+. high
low - CORRECT ANSWER -low
What class of neurons are chemoreceptors?
Afferent neurons Interneurons Efferent neurons
Motor neurons - CORRECT ANSWER -Afferent neurons
Peripheral chemoreceptors are located in the _____________________. Choose all that apply. aortic arch carotid bodies medulla
arteries of legs and arms - CORRECT ANSWER -aortic arch
carotid bodies Central chemoreceptors are located in the ____________________. Choose all that apply. aortic arch carotid bodies medulla
arteries of legs and arms - CORRECT ANSWER -medulla
Excessive vomiting due to the stomach flu will result in ____________________. acidosis
alkalosis - CORRECT ANSWER -alkalosis
Holding your breath will cause a build-up of CO2 in your bloodstream. How will chemoreceptors respond to this situation? They will send more action potentials to the respiratory centers of the brain. They will send more action potentials to the diaphragm. They will send fewer action potentials to the respiratory centers of the brain.
They will send fewer action potentials to the diaphragm. - CORRECT ANSWER -
They will send more action potentials to the respiratory centers of the brain. Increasing your respiratory rate will result in a(n) ______________________ in the pH of your body fluids. decrease
increase - CORRECT ANSWER -increase
Which of the following structures promotes the most exchange of oxygen and carbon dioxide in with the bloodstream?
False - CORRECT ANSWER -false
During hyperventilation, the blood becomes basic. Which of the following is one mechanism to help restore homeostasis? Increase the action of cardioacceleratory neurons Release norepinephrine at the SA node Stimulate the adrenal gland
Reduce the action potential rate of inspiratory motor neurons - CORRECT
ANSWER -Reduce the action potential rate of inspiratory motor neurons
An increase in action potentials to the diaphragm will result in an increase in respiratory rate (breaths/minute). True
False - CORRECT ANSWER -true
