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TEST 2 BIO 242/ FALL NAME ID #, Exams of Nursing

Students MUST enter their name and ID number on BOTH the question and answer (scantrons) sheets of each exam in the correct spaces. Also students must enter the correct version of their tests on their answer (scantrons) sheet in the correct space, failure to do so will result in an automatic zero for that exam. Choose the best answer. Fill in the appropriate bubble. Make sure ALL electronic equipment is put away. For true, fill in a. For false, fill in b.

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2022/2023

Available from 08/17/2023

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TEST
2 BIO 242/ FALL NAME
ID #
Students MUST enter their name and ID number on BOTH the question and answer (scantrons) sheets
of each exam in the correct spaces. Also students must enter the correct version of their tests on their
answer (scantrons) sheet in the correct space, failure to do so will result in an automatic zero for that
exam.
Choose the best answer.
Fill in the appropriate bubble.
Make sure ALL electronic equipment is put
away. For true, fill in a.
For false, fill in b.
form channels between cells, allowing ions and small molecules to diffuse directly from
one cell to the other.
Connexins
Cadherins
Dyneins
E) Tubulins
Which of the following components of the plasma membrane forms ion channels?
phospholipids
cholesterol
membrane
carbohydrates D)
membrane proteins
T/F Movement of K+ into the cell requires energy expenditure, whereas movement of Na+ into the
cell does not.
4 ) The autonomic nervous system is
part of the somatic nervous system.
considered to be the involuntary branch of the efferent division of the peripheral nervous system.
part of the central nervous system.
D) all of these answers.
Non polar molecules are capable of crossing the membrane . A) directly across the lipid bilayer
only through specific protein channels
only with the addition of energy
indirectly by moving across a carrier protein
The fact that a cell has an electrical potential difference across its membrane makes that cell .
depolarized
hyperpolarized
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TEST 2 BIO 242/ FALL NAME

ID

Students MUST enter their name and ID number on BOTH the question and answer (scantrons) sheets of each exam in the correct spaces. Also students must enter the correct version of their tests on their answer (scantrons) sheet in the correct space, failure to do so will result in an automatic zero for that exam. Choose the best answer. Fill in the appropriate bubble. Make sure ALL electronic equipment is put away. For true, fill in a. For false, fill in b.

  • form channels between cells, allowing ions and small molecules to diffuse directly from one cell to the other.
  • Connexins
  • Cadherins
  • Dyneins E) Tubulins
  • Which of the following components of the plasma membrane forms ion channels?
  • phospholipids
  • cholesterol
  • membrane carbohydrates D) membrane proteins
  • T/F Movement of K+^ into the cell requires energy expenditure, whereas movement of Na+ into the cell does not. 4 ) The autonomic nervous system is
  • part of the somatic nervous system.
  • considered to be the involuntary branch of the efferent division of the peripheral nervous system.
  • part of the central nervous system.
  • D) all of these answers.
  • Non polar molecules are capable of crossing the membrane. A) directly across the lipid bilayer
  • only through specific protein channels
  • only with the addition of energy
  • indirectly by moving across a carrier protein
  • The fact that a cell has an electrical potential difference across its membrane makes that cell.
  • depolarized
  • hyperpolarized
  • repolariz ed D) polarized VERSION 1
  • The autonomic nervous system innervates all the following effector organs and tissues except .
  • skeletal muscles
  • cardiac muscles
  • endocrine glands
  • smooth muscle
  • exocrine glands
  • Which of the following associations between metabolic pathway and location in the cell is INCORRECT?
  • glycolysis : cytosol
  • electron transport system : inner mitochondrial membrane
  • lipid synthesis : smooth endoplasmic reticulum D) Krebs cycle : mitochondrial intermembrane space
  • When O2 is not readily available, what is pyruvate (pyruvic acid) converted to and where does this occur?
  • acetyl coenzyme A in the mitochondria
  • acetyl coenzyme A in the cytosol
  • lactate (lactic acid) in the mitochondria D) lactate (lactic acid) in the cytosol E) fatty acid in the cytosol
  • In terms of energy production, the Krebs cycle is significant because it.
  • directly produces large amounts of ATP
  • reduces the coenzymes NAD and FAD for oxidative phosphorylation
  • produces acetylcoenzyme A for fatty acid synthesis
  • none of the above
  • Which of the following statements about oxidative phosphorylation is FALSE?
  • Hydrogen ion movement from the mitochondrial matrix to the intermembrane space activates the enzyme ATP synthase.
  • As electrons move down the electron transport chain, released energy is used to transport hydrogen ions across the inner mitochondrial membrane.
  • The components of the electron transport chain are located on the inner mitochondrial membrane.
  • all of the above are false
  • What is the final acceptor of electrons in the electron transport?
  • pyruvate
  • carbon dioxide

hypopolarization D) polarization

  • During which of the following processes is the most ATP generated? A) electron transport chain
  • glycolysis
  • Kreb’s cycle
  • the linking step
  • Which of the following results in the formation of acetyl Co A?
    • glycolys is B) linking step
  • Kreb’s cycle
  • electron transport chain
  • T/F Most of the CO2 generated in cellular respiration occurs in the linking step.
  • Activation of the cyclic AMP second messenger system ultimately leads to the phosphorylation of particular
  • carbohydrat es B) proteins
  • lipids
  • fatty acids
  • At the resting membrane potential, the membrane is most permeable to , which moves the cell due to its concentration gradient.
  • sodium : into
  • potassium : into C) potassium : out of D) sodium : out of
  • At the resting membrane potential, the electrochemical gradient for sodium across the membrane is such that the net flux for sodium movement is directed , thereby causing the cell's membrane potential to become more.
  • inward : positive
  • inward : negative
  • outward : positive
  • outward : negative
  • A is a subthreshold change in membrane potential within the cell body that dies out as it travels away from its point of origin.
  • polarization
  • hyperpolarization
  • action potential D) graded potential
  • Which of the following is an example of spatial summation?
  • Two stimuli from two sources produce graded potentials on the same neuron at the same time such that the two potentials sum.
  • Two rapid stimuli from the same source produce graded potentials on the neuron that sum.
  • An action potential occurs at the same time as a graded potential, and they sum.
  • A neuron sends out information through collaterals to several target cells.
  • The binding of a neurotransmitter to its receptor at an inhibitory synapse can lead to the of channels. A) opening : chloride
  • closure : potassium
  • opening : sodium
  • closure : chloride
  • The steps of synaptic transmission at the motor end plate are listed below, out of order. Choose the correct order.
    • Acetylcholine binds to postsynaptic receptors.
    • Acetylcholine is released by exocytosis.
    • A graded depolarization is produced
    • An action potential is produced on the muscle cell membrane.
    • Channels for both sodium and potassium are opened
    • Voltagedependent calcium channels on the plasma membrane open.
    • An action potential arrives at the axon terminal. A) 7521346 B) 7621534 C) 5231746 D) 2153674 E) 4357261 A
  • In the above diagram of chemiosmotic coupling, are being moved against their concentration gradient from the to the.
  • ATP’s/ intermembrane space/ matrix B) H+’s / matrix / intermembrane space
  • NAD+’s / intermembrane space / matrix
  • thalamus
  • basal nuclei
  • brain stem
  • Damage to the cerebellum will lead to which of the following symptoms?
  • a complete inability to move (lack of execution)
  • an inability to accurately plan a movement
  • the generation of precise, fine movements only
  • the generation of clumsy, poorly directed movement
  • What area of the brain controls language comprehension?
  • Broca's area B) Wernicke's area
  • amygdala
  • limbic system
  • When the body is stressed, what is the relative contribution of the sympathetic and parasympathetic nervous systems to the regulation of homeostasis?
  • Only the sympathetic system is active.
  • Both systems are active but the parasympathetic predominates.
  • Only the parasympathetic system is active.
  • Both systems are active but the sympathetic predominates.
  • What is the graded change in membrane potential that occurs at the motor end plate of skeletal muscle called?
  • Inhibitory postsynaptic potential B) Endplate potential
  • Muscarinic potential
  • Adrenergic potential
  • The most primitive region of the brain is the.
  • basal nuclei
  • limbic system
  • cerebell um D) brain stem
  • Which type of glial cell is involved in the production of the cerebral spinal fluid? A) ependymal cells
  • microglial cells
  • astrocytes
  • oligodendrocytes
  • Which type of Na+ gates in the neuronal axons, have three conformations; one of which is responsible for the one way propagation of action potentials down the axon?
  • Ca++
  • K
  • C) Na+

D) none of the above