Which set of facts about action potential is TRUE?
•
Every stimulus can generate it.
Potassium gates open to allow an inflow of potassium ions.
•
It requires a stimulus to take place.
Sodium gates op
...
Which set of facts about action potential is TRUE?
•
Every stimulus can generate it.
Potassium gates open to allow an inflow of potassium ions.
•
It requires a stimulus to take place.
Sodium gates open to allow an inflow of sodium ions.
•
It is exhibited by cells that were previously at resting potential.
It is created by an equal distribution of ions.
•
It is exhibited by cells that were previously not at resting potential.
It is created by an unequal distribution of ions.
2
Which of the following is an example of an integrator working to maintain homeostasis?
The brain processes information about blood calcium levels being too high and determines
that calcium levels need to be lowered.
•
Muscle cells cause you to shiver in an attempt to raise your body temperature if it is too
low.
•
The heart begins pumping faster if blood pressure drops too low.
Thermoreceptors in your body detect a change in temperature when you walk into an air-
3
What is a genetic mutation?
Joining of DNA molecules
Transcription of DNA
Change in DNA sequence
Replication of DNA
4
What is the term for wave-like contractions of the digestive tract that help move food through?
Palate
Bolus
Salivary amylase
Peristalsis
5
How do blood vessels maintain homeostasis when blood pressure increases?
Vasoconstriction
Vasodilation
Which developmental disorder of the brain hinders thinking, language and social skills?
CONCEPT
Which part of the digestive system primarily absorbs nutrients?
•
Small intestine
•
Stomach
•
Pharynx
•
Mouth
What is the pinched region called where two sister chromatids are joined together?
•
Chromosome
•
Centromere
•
Centrosome
•
Centriole
9
Which node does a pacemaker assist?
•
The AV node
•
Both the SA and AV nodes
•
It acts against both nodes
•
The SA node
Chloe is studying the effect a certain kind of fungus has on bacteria.
Which of the following could be her hypothesis?
•
"Based on many tests, I realize that this fungus kills bacteria."
•
"I propose that this fungus somehow kills bacteria."
•
"I predict that the bacterial cultures in which I place this fungus will not grow."
•
"I notice that when a certain fungus is present in a bacterial culture, the bacteria do not
grow."
11
Which of these is a characteristic of adaptive immunity?
It does not recognize MHC.
It is non-specific.
It produces memory cells.
It is the first line of defense.
12
Select the TRUE statement about antibody-mediated immune responses, also known as humoral immunity.
It is most effective at fighting pathogens outside of a cell.
It is only effective at fighting toxins that have invaded a cell.
It is most effective at fighting pathogens that have invaded a cell.
It is only effective at fighting viruses.
13
A rise in released from the sarcoplasmic reticulum allows actin to bind to
myosin and cause a contraction, which requires energy.
oxygen; ATP
calcium; ATP
oxygen; kinetic
Which of the following hormones is secreted by the adrenal medulla?
•
Epinephrine
•
Glucocorticoids
•
Mineralocorticoids
•
Cortisol
A woman in labor is giving birth to a baby feet first, or in breech.
What should the doctor do?
•
Push the baby back into the uterus.
•
Cut the umbilical cord.
•
Turn the baby around.
•
Pull the baby out of the mother's body.
Which of the following is a skeletal disorder that occurs when two bones at a joint are no longer in contact with each other?
•
Atrophy
•
Fracture
17
Which of the following is produced by the endoplasmic reticulum?
•
ATP
•
Lipids
•
Nucleic acids
•
Carbohydrates
Bert has blonde hair (b). Molly has brown hair (B), but her genotype is Bb, meaning she carries a recessive blonde allele.
What is the likelihood of Bert and Molly's second child having brown hair?
•
75%
•
100%
•
25%
•
50%
Which type of muscle makes up blood vessels?
•
Skeletal
•
Smooth
•
Cardiac
•
None--blood vessels are not muscles
20
Which lobe of the brain is responsible for vision?
•
Temporal lobe
•
Parietal lobe
•
Occipital lobe
•
Frontal lobe
Which of the following statements about enzymes is true?
•
The function of an enzyme is to speed up chemical reactions that occur in your body.
•
Enzymes are composed primarily of carbohydrates.
•
Enzymes can only break down larger substances into smaller ones.
•
Enzymes are single-use proteins that must be regenerated after each reaction.
Which type of digestion occurs in the stomach?
•
Chemical
•
Both mechanical and chemical
•
Mechanical
•
Neither mechanical nor chemical
23
Which type of lipid doesn't have glycerol?
•
Phospholipid
•
Triglyceride
•
Saturated fat
•
Sterol
Which of the following statements is true?
•
The axon fulfills a structural purpose and does not carry any signals.
•
The axon conducts signals toward the cell body.
•
The axon carries signals to and from the cell body.
•
The axon conducts signals away from the cell body.
25
Which gland is called the "master gland?"
Thyroid gland
Adrenal gland
Pituitary gland
Thymus gland
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