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UWorld MCAT Biology exam review questions and answers

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UWorld MCAT Biology exam review questions and answers

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  • August 4, 2024
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Waynee
UWorld MCAT Biology exam review
questions and answers
Where can you find peptides floating in blood? - plasma (liquid portion of the
blood)



What is lymph? - liquid squeezed out into the interstitial space by hydrostatic
pressure



a colorless fluid containing white blood cells, that bathes the tissues and drains
through the lymphatic system into the bloodstream.



What are lymph nodes? - pockets of lymph vessels with white blood cells that take
lymph and return it back to the circulatory system



houses leukocytes



Glomerular filtration rate __________when efferent arterioles dialate - decrease



glomerular filtration rate also decreases when the afferent arterioles constrict

,UWorld MCAT Biology exam review
questions and answers
When aldosterone is activated, Na+ reabsorption in the blood causes blood
pressure to __________ - increase



What are the functions of the spleen? - -filters aged/damaged rbcs

-reservoir for blood

-immune response (houses macrophages, B cell activation site)



What are the types of B-cells - effector (plasma) B: produce antibodies for current
infections



memory B:



what organ regulates blood glucose? - pancreas



reducing vs non reducing SDS Page - SDS-Page creates net negative charge on
proteins, sorts based on size (not charge or shape)




reducing: disrupts disulfide bridges (ie breaks covalent bonds)

,UWorld MCAT Biology exam review
questions and answers

non-reducing: doesn't disrupt disulfide bridges



T/F The left ventricle receives blood from the left atrium - False



tubes always connect into atriums and then to ventricles and then out of
ventricles



What are endothelial cells? - single cell layer of epithelial cells that line the blood
vessels



blood vessels have 3 layers

inner: endothelium

middle: smooth muscle

outer: connective tissue



What is systolic pressure? Diastolic pressure? - systolic is pressure pushing blood
out of heart

diastolic pressure is the blood rushing back into the heart

, UWorld MCAT Biology exam review
questions and answers

Hyperventilation is the same as increasing respiratory rate, which leads to -
exhaling lots of CO2, inhaling less O2



loss of CO2 pushes equation left, causing H levels to go down



leads to more basic blood



In response to an asthma attack (can't breathe, CO2 piles up), the body tries to
induce hyperventilation which causes body to excrete lots of CO2 and raise the
blood pH



During inspiration, the diaphragm, intrapleural pressure, and chest cavity do
what? - diaphragm: contracts (moves down)



intrapleural pressure: decreases (becomes negative to create sucking pressure)



chest cavity: moves up

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