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Bio 264 Final Review WITH ANSWERS GRADED A+
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EUNICEBio 264 Final Review WITH COMPLETE ANSWERSE
Captain Jack Sparrow is in a sword fight transverse
with an evil skeleton pirate. If Jack were to
cut off the skeleton's head, his sword would
be following which body plane:
Which of these statements about positive Birth is an example of a normally occurring positive feedback mechanism.
feedback is the MOST correct?
Which of the following is NOT an example During pregnancy, uterine stretching stimulates uterine muscle contraction.
of a negative feedback loop?
Which of these statements concerning Birth is an example of a normally occurring positive-feedback mechanism.
positive feedback is correct?
Which of the following BEST explains why a The set point for the homeostatic temperature has been increased and their body is
person with a fever is shivering but is hot to trying to match the new set point.
the touch?
Johnny eats three glazed doughnuts for 1. Blood sugar level is the set point in this scenario.
breakfast, which caused his blood glucose 2. The release of insulin helps with negative feedback in this scenario.
levels to increase. In response to this, his 3. The release of glucagon helps with negative feedback in this scenario.
pancreas secretes insulin, which results in
the transfer of glucose from the blood into
the cells. This process decreases Johnny's
blood glucose and he starts to feel hungry
again. Johnny is studying for a test and
doesn't have time to go home for lunch. As
his blood glucose levels continue to drop
his pancreas then secretes glucagon.
Johnny's liver then responds by releasing
glucose into the blood. Which one of the
following statements about this scenario is
MOST correct?
1/8
, A researcher was studying the control of
the level of Hormone W in rats. If the level
of hormone W in the blood is controlled by
a negative feedback loop, then injecting a
rat with a small amount of Hormone W
would have the following effect:
The atomic number of an atom is _____ _. the number of protons in the atom.
The nucleus of an atom is composed of protons and neutrons.
________.
Which of these elements would be very An element with 8 electrons in its third orbital
stable?
Which of these particles is the smallest in Electron
size?
How is atomic weight calculated? The number of protons plus the number of neutrons contained in the nucleus.
How many electrons in the outer most shell 3 electrons
are there for Boron?
__________ bonds are formed when atoms Nonpolar covalent
share electrons equally.
Which statement is NOT true about ionic An ion has the same number of electrons as a non-ionic atom of the same element
bonds?
Within our body chemistry which of the Covalent bond
following chemical bonds is the strongest?
Molecules that form when electrons are polar molecules.
shared unequally between atoms are
called ____ _.
A cation is a (an) positively charged atom.
Na wants to give up an electron and Cl wants to accept an electron- making both
Why do Na and Cl make a bond?
atoms more stable.
Hydrogen can form 2 bonds in order to complete a complement of 8 electrons in its
Which statement is false
outer most shell
Which of the following can be found in ionic bonds and polar covalent bonds
hydrophilic compounds?
In water hydrogen bonding occurs an oxygen atom in a different molecule
between the hydrogen atom in one
molecule and _______ _.
To make a 1% solution of glucose you 1
would dissolve ___ gram(s) of glucose into
enough water to make a 100mL solution.
Osmolarity differs from molarity osmolarity reflects the number of particles in solution
How does water help to maintain the As water molecules slow down they form more hydrogen bonds and release energy
body's temperature even when the weather and Since water has a high heat capacity it retains heat longer.
is cold?
2/8
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