Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
What are the nucleotide bases in DNA?
|
Adenine, guanine, thymine, and cytosine
|
|
|
What are the base pairing rules for DNA?
|
A-T
G-C |
|
|
One species' DNA differs from others in its _____
|
base sequence
|
|
|
When DNA replication begins, ________
|
the two DNA strands unwind from each other
|
|
|
DNA replication requires
|
Free nucleotides,
New hydrogen bonds, Many enzymes |
|
|
_______ is the basis for life's diversity
|
variation in the base sequences in DNA
|
|
|
Adult cloning starts with ________
|
nuclear transfers
|
|
|
DNA contains many different gene regions that are transcribed into different ____
|
mRNA, tRNA, rRNA
|
|
|
An RNA molecule is typically ____
|
single-stranded
|
|
|
An mRNA molecule is synthesized by
|
transcription
|
|
|
Each codon specifies ____
|
Amino Acid
|
|
|
___ different codons represent a near-universal genetic code:
|
64
|
|
|
Anticodons pair with
|
mRNA codons
|
|
|
____ can cause gene mutations
|
replication errors, transposons, ionizing radiation, non-ionizing radiation
|
|
|
tissues are sheet-like with one free surface
|
epithelial
|
|
|
___ junctions function in cell-to-cell communication
|
gap
|
|
|
In most animals, glands are located in ________ tissue
|
epithelial
|
|
|
Most __________ tissues have collagen and elastin fibers.
|
connective
|
|
|
__________ is mostly plasms.
|
blood
|
|
|
Your body converts excess carbohydrates and proteins into _________ tissue
|
adipose
|
|
|
In your body, cells of ______ tissue can shorten
|
muscle
|
|
|
Only ________ muscle tissue is striated
|
skeletal & cardiac
|
|
|
_________ tissue detects and integrates information about changes and controls responses
|
nervous
|
|
|
______ relay messages from the brain and spinal cord to muscles and glands.
|
motor neurons
|
|
|
When a neuron is at rest __________.
|
it is at threshold potential and the sodium-potassium pump is operating
|
|
|
Action potentials occur when ______
|
a neuron receives adequate stimulation and the sodium gates open in an ever accelerating way
|
|
|
Neurotransmitters are released by _______
|
axon endings
|
|
|
The most abundant cells in the brain are ______.
|
astrocytes
|
|
|
Skeletal muscles are controlled by __________.
|
somatic nerves
|
|
|
you sit quietly on the couch reading, output from the _____ system prevails
|
parasympathetic
|
|
|
Skeletal muscles contract in response to ________.
|
acetylcholine
|
|
|
The cerebrum is part of the _________.
|
forebrain
|
|
|
A stimulus is a specific form of energy in the outside environment that is detected by _______
|
sensory receptor
|
|
|
_______ is defined as a decrease in response to an ongoing stimulus
|
sensory adaptation
|
|
|
In the ______ neurons are arranged like maps that correspond to different parts of the body surface
|
cerebral cortex
|
