Terms in this set (89)
22) Which answer choice lists the steps of the scientific method in the correct order?
A) hypothesis, observation, experiment, conclusion, data collection
B) conclusion, hypothesis, observation, experiment, data collection
C) observation, hypothesis, experiment, data collection, conclusion
D) observation, experiment, hypothesis, conclusion, data
collection
E) data collection, conclusion, hypothesis, experiment, observation
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Terms in this set (30)
The molecule that provides immediate energy for cellular processes is
adenosine triphosphate.
Select the correct statement:
DNA is double-stranded but RNA is single-stranded, although their nucleotides are identical.
DNA contains the genetic code, and RNA carries the coded information to the sites of protein synthesis.
DNA and RNA are single-stranded molecules with dissimilar nucleotides.
DNA and RNA are double-stranded molecules composed of nucleotides.
DNA contains the genetic code, and RNA carries the coded information to the sites of protein synthesis.
A nucleotide that RNA uses but DNA does not is ________.
uracil
Enzymes directly act to
speed up chemical reactions
In ________, the sequence of bases in DNA determines the sequence of bases in mRNA, and the process occurs in the ________.
transcription; nucleus
Cellular respiration requires ________ to break down organic nutrients to release energy, which is captured in high energy ________ bonds.
oxygen; phosphate
How many nucleotides are needed to form a codon?
3
The difference between DNA and RNA is that
there are differences in sugars, bases, and the number of strands.
After being produced, ________ provides the blueprint for assembling proteins.
mRNA
The form of carbohydrate our bodies use to store reserve energy is ________.
glycogen
________ hormones bind to a receptor on the ________, which releases an enzyme that converts ATP into cAMP.
Nonsteroid; plasma membrane
The secretion of adrenocorticotropic hormone is controlled by
a releasing hormone from hypothalamus.
The hypothalamus regulates hormones from the anterior lobe of the pituitary gland using ________, while it regulates the posterior lobe of the pituitary gland using ________.
hormones; nerve impulses
The secretion of follicular-stimulating is controlled by
a releasing hormone from hypothalamus.
The secretion of prolactin is controlled by
a releasing hormone and an inhibiting hormone from hypothalamus.
________ hormones bind with an intracellular receptor to form a ________, which activates specific genes.
Steroid and thyroid; receptor-hormone complex
The secretion of thyroid-stimulating hormone is controlled by
a releasing hormone from hypothalamus.
________ is secreted by beta cells of pancreas, its secretion is stimulated by ________ in blood glucose level.
Insulin; an increase
________ stimulates the testes to produce testosterone.
Luteinizing hormone
Nonsteroid hormones ________ pass across the plasma membrane; they cause the target cells to ________ that produce the characteristic effects of the hormones.
cannot; activate or inactivate the cellular enzymes
The pulmonary circuit carries ________ blood from the ________ to the lungs and returns ________ blood to the ________.
deoxygenated; right ventricle; oxygenated; left atrium
The first heart sound (lub) results from the closing of the ________ valves in the beginning of ________.
AV; ventricular systole
The pulmonary veins carry ________ blood to the ________.
oxygenated; left atrium
The ventricles receive the impulses from the
ventricular fibers.
When ________, blood is forced into the ventricles.
the atria contract and the ventricles relax
When ________, blood flows passively into the atria and then passively into the ventricles.
both the atria and the ventricles relax
Which of the following is the correct pathway of the electrical impulses of the heart conduction system?
SA node → AV node → AV bundle → AV branch → Ventricular fibers
The T wave of an ECG is produced by the
repolarization of the ventricles.
The QRS complex of an ECG is produced by the
depolarization of the ventricles.
When the right ventricle contracts, the
right atrium always relaxes simultaneously.
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