Exam 1

A  none of the choices.

B  same amount of ACh releases

C  more ACh releases

D  less ACh releases

A  The tropomyosin will be moved to the side

B  power stroke occurs

C  The Ca2+ will be removed from sarcoplasm

D  The myosin will get disconnected from actin

A  Lysosome

B  SER

C  Golgi

D  Centriole

A  30%

B  40%

C  20%

D  can not be determined

A  latent

B  contraction

C  none of the choices

D  relaxation

A  more calcium is available in the sarcoplasm

B  additional neurons begin stimulating each muscle fiber

C  stronger stimuli inhibit motor unit activation

D  recruitment occurs and more motor units respond to stronger stimuli

A  Calcium ions bind to lactic acid to remove it from the contracting muscle.

B  The release of calcium ions triggers the immediate regeneration of creatine phosphate to power the contraction.

C  Calcium ions directly activate ATPase in the myosin head.

D  Calcium ions bind to the troponin-tropomyosin complex and remove their inhibitory action on actin/myosin interaction.

A  cause ATP binding to actin

B  increase the conduction speed of action potentials transmitted along the sarcolemma

C  release the inhibition on Z discs

D  remove the blocking action of tropomyosin

E  release synaptic vesicles from the axon terminal

A  Myosin head will not be disconnected from actin

B  ATP pathway will be gone so muscle will not contract.

C  Actin protein will not get stabilized

D  AP or electrical impulse will not reach the SR

A  FALSE

B  TRUE

A  anaerobic; anaerobic

B  anaerobic; aerobic

C  aerobic; aerobic

D  aerobic; anaerobic

A  Intermediate filaments

B  Microfilaments

C  Microtubules

D  Actin filaments

A  The chromosomes must be duplicated.

B  A mitotic spindle must form.

C  The nuclear envelope must break up.

D  The sister chromatids must be separated.

E  The nucleus must divide in two.

A  organelle

B  cytoplasm

C  cell wall

D  DNA

A  Metaphase

B  Telophase

C  prophase

D  Anaphase

A  centrioles

B  peroxisomes

C  lysosomes

D  rough endoplasmic reticulum

A  the polar heads are pointed toward the center of the membrane

B  the polar heads face the interior and exterior of the cell with the tails forming the center of the membrane

C  the polar heads and nonpolar tails alternate facing inward

D  the nonpolar tails are oriented toward the interior of the cell, next to the cytoplasm

A  The cell will not make protein properly

B  The cell will run out of energy

C  The cell will collapse

D  Waste will accumulate in the cell and more chances of infection may occur

A  Met-Gly

B  Met-Pro

C  Met-Arg

D  none of the choices

E  Met-stop

A  osmosis

B  diffusion

C  filtration

D  endocytosis

A  Through interaction with an integral membrane protein

B  Steroid hormones don’t interact with target cells

C  Inside the target cell’s cytoplasm or nucleus

D  On the exterior surface of the cell

A  hydrogen atoms

B  small size

C  ability to form hydrogen bonds

D  oxygen atom

A  the total number of electrons

B  the number of neutrons in the nucleus

C  the number of protons in the nucleus

D  the number of valence shell electrons

A  Acidic

B  none of the choices.

C  neutral

D  basic

A  hydrogen bonds between adjacent amino acids

B  individual amino acids

C  aggregations of polypeptides formin a complex protein with more than two subunits.ming a complex protein

D  alpha-helices

A  being a genetic blueprint

B  forming the basis of the cell membrane bilayer

C  as cellular fuel

D  protein synthesis

A  gap junction

B  receptor

C  tight junction

D  desmosomes

A  N

B  C

C  Ca

D  H

A  All of the choices could affect the enzyme function

B  noncompetitive inhibitor

C  competitive inhibitor

D  altering the active site

E  Temperature

A  effector

B  control center

C  receptor

D  none of the choices.

A  remain unchanged

B  twofold increase

C  threefold increase

D  decrease

A  When the output shuts off the original effect of the stimulus

B  The ability to maintain relatively stable internal conditions even though the outside world changes continuously

C  The ability to maintain relatively stable external conditions even though the inside world changes continuously

D  The response enhances the original stimulus so that the response is accelerated

A  by increasing the Calcium in the blood by activating calcitonin

B  by stimulating the Thyroid gland to release Calcium

C  By providing Ca to the blood during bone resorption and activation of asteoclast cells

D  none of the choices.

A  structure is related to the function

B  SER achieving homeostasis

C  negative feedback

D  Positive feedback

A  hierarchical organization

B  negative feedback

C  homeostasis

D  complementarity