Answer: a. to provide support and structure for cells in hair, skin, and nails
Explanation:
Keratin - Wikipediaen.wikipedia.org › wiki › Keratin
Keratin (/ˈkɛrətɪn/) is one of a family of fibrous structural proteins known as scleroproteins. α-Keratin is a type of keratin found in vertebrates. It is the key structural material making up scales, hair, nails, feathers, horns, claws, hooves, calluses, and the outer layer of skin among vertebrates.
If the heart rate drops and the stroke volume increases, cardiac output will always show a
decrease.
O True
False
Answer:
False
Explanation:
hope this helped! :)
If a man is color blind (an X-linked trait), how did he get this condition?
He got it from either his mom or his dad.
He got it from both his mom and his dad.
He got it from his dad.
He got it from his mom.
Answer:
He got it from his mom.
Explanation:
An X-linked trait means it is transmitted on the X chromosome.
Females have two X chromosomes (XX), and males have one X and one Y chromosome (XY).
Males get their Y chromosome from their dad, and X chromosome from their mom.
Therefore, the man inherited the colorblindness trait (X chromosome) from his mom
The swallowing phase where the velopharynx closes forcefully and larynx completely closes at 3 levels is the...
a. Tongue preparatory phase
b. Pharyngeal transport phase
c. Oral transport phase
d. Laryngeal transport phase
Answer:
b. Pharyngeal transport phase
Explanation:
During the pharyngeal phase, the vocal folds close to keep food and liquids from entering the airway.
Swallowing the velopharynx closes forcefully and the larynx completely close at the level of the pharyngeal transport phase this action seal the airway passage, hence option b is correct.
What is swallowing ?According to where the bolus is located, the swallowing process is often split into oral, pharyngeal, and esophageal phases. When consuming solid food vs drinking liquid, the food moves differently through the oral cavity and into the oropharynx.
The tongue closes the oropharynx while it is in the pharyngeal phase. The proximal pharyngeal wall and soft palate serve as a barrier to the nasopharynx.
The laryngeal entrance is sealed off by the vocal cords and arytenoids, and the epiglottis swings down to cover the laryngeal vestibule. These acts close up the pharyngeal cavity's airway.
Therefore at 3 levels, the velopharynx closes forcefully and the larynx completely closes in the pharyngeal transport phase action to seal the airway passage, hence option b is correct.
Learn more about swallowing, here:
https://brainly.com/question/9374866
#SPJ2
What will happen following contraction of the diaphragm
Answer:
Can you provide more details please?
Explanation:
What technology is used to extract Natural gas?
Answer: Hydraulic fracturing, or fracking, is a drilling method used to extract petroleum (oil) or natural gas from deep in the Earth
Explanation:
For the cross bbEe x BbEe, choose all possible gametes produced by BbEe parent
HHRRTSEE rearrange this
Answer:
THRESHER
Explanation:
By imagining where she was when she last walked in the door, Marla retraced her steps to find her keys. This is an
example of a
dependent memory.
A. mood
B. echoic
c. state of being
D. context
Marla imagining where she was and retracing her steps to find her keys is an
example of a context dependent memory.
Context-dependent memory can defined as when an individual recalls
specific events or information when the context present are the same for
that of the encoding and retrieval of the event.
In this scenario, Maria imagining where she was when she last walked in the
door is the same as where her key is to be found.
Read more on https://brainly.com/question/19037542
Methamphetamine increases the brain's levels of dopamine, __________ and __________.
a) norepinephrine, serotonin
b) GABA, epinephrine
c) acetylcholine, enkephalins
d) glutamate, serotonin
Answer:
a) norepinephrine, serotonin
Explanation:
Neurotransmitters are special lipid-based molecules used in chemical signal transduction in the nervous system. They have receptor-specific roles in activating different regions of the central nervous system (CNS) and physiological responses. These include: dopamine, norepinephrine, and serotonin .
The CNS, which includes the brain and spinal cord, can be affected by certain drugs like methamphetamine. This drug is a stimulant that acts on brain regions such as:
prefrontal cortex the striatumthe nucleus accumbensIt causes the release of neurotransmitters while blocking their reuptake at synapses; meth is metabolized very slowly over time (12 hours). The buildup of dopamine, for instance, leads to altered moods, feelings of pleasure and euphoria.
Thus, this change or "high" leads to dependency by users for its mood-altering effect; however, less dopamine is released, and the pleasurable effects, become less potent. Studies show neurological damage with prolonged use, and habit formation and over time, addiction.
What similarities and differences do DNA and RNA share in terms of function and structure? Explain!
Answer: Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine).
Explanation:
if tanA= x/y find the value of xsinA+ycisB
Answer:
If tan A = 3 / 5, then sin A = 3√34 / 34 and cos A = 5√34 / 34 .
Assuming x = 5 and y = 3 (The problem is deficient in this regard)
5(3√34 / 34) + 3(5√34 / 34)
30√34 / 34
15√34 / 17
Explanation:
I hope this helps!
The convection cycles of mantle are the main cause of movement of what part of the Earth?
Answer:
The crust ( I think)
Explanation:
3. Which of the samples shown below are eukaryotic?
• A. B and D
• B. B and C
• C. A, C, and D
• D. A, B, and D
Answer:
b and c
Explanation:
what causes differences in air pressure
A. the windchill factor
B. the horizontal movement in the air
C. the speed at which wind moves
D. the unequal heating of Earth's atmosphere
Answer:
I think the answer is A
Explanation:
hope its right
Answer: D. the unequal heating of Earth’s atmosphere.
Explanation: It mixes, boom! air pressure.
1. Where in the paramecium might you find proteins? Explain why?
How would you restate in your own words the law of conservation of mass?
Answer:
The Law of Conservation of Mass
In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
Explanation:
I think this is the answer
Which of the following choices is NOT an essential nutrient?
A
amino acids
B
nucleic acids
с C
fatty acids
D
vitamins
Answer:
the answer is B. nucleic acids
Seed production and fruit production occurs in the ________ of plants
-PLEASE ANSWER!!!
A. Root System
B. Shoot System
C. Reproductive System
Answer:
the answer is c
Explanation:
Living things need to maintain their internal environment . This is known as homeostasis What role does homeostasis play in controlling the rate of chemical reactions in our bodies ?
Answer:
Homeostasis is the tendency to resist change in order to maintain a stable, relatively constant internal environment. Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points.
With parallel flow, diffusion of urea happened at regions I and II but not at regions III, IV, or V because...
A
Urea was too big to fit through the pores in regions III, IV, or V.
B
There was no concentration gradient for urea in regions III, IV, or V.
С
There was no urea in the blood in regions III, IV, and V.
D
The pore size was too small in regions III, IV, and V.
Answer:B
Explanation:bc all of the other ones was equal together and the concentration gradient could not spread them
Answer:
The correct answer is
b
Explanation:
First we can elimenate A and D because the pore size is the same.
C is wrong, there is still some urea in the blood, however is less
We are left with B which is the correct answer, i did the gizmo
Please leave a thanks and rate this answer 5 stars, you don't need an acount to do this.What type of hormone is testosterone?
a steroid hormone
a protein hormone
a neurotransmitter
DNA TO PROTEIN
How is DNA used to “make” Proteins?
OCA2 Gene:
ATA CTC TAC CTT GAG CCG
Answer:
The recombinant vesiculoviruses can also be inactivated for use as killed vaccines. ... 102000004163 DNA-directed RNA polymerases Human genes 0.000 claims ... Proteins 0.000 claims description 54; 101710002679 OCA2 Proteins 0.000 ... CCA TTC AAT ATA GGT CTT TAC AAG GGA ACG ATT GAG CTC ACA ATG ...
Explanation:
The virus thus constructed can be used as an immunization vaccine against measles ... 108090000626 DNA-directed RNA polymerases Proteins 0.000 claims ... Proteins 0.000 claims description 37; 102100016028 P protein Human genes ... Trp Trp 480 485 490 gct gag caa gat tct ccg ttc tgc ttc ctt gcg ttc tgc ttt gag tac 1539 ...
what is biology definition?
Answer:
the study of all living things
Explanation:
Please Help I'll give branliest!!!
Answer:
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Which of the following does NOT affect the climate?
greenhouse effect
solar radiation
war
Answer
the answer is war
Explanation:
Answer:
the one that does not affect the climate is the greenhouse effect
Explanation:
Which label identifies the part of the ATP molecule that changes when energy is released in the cells of all living
things?
B
Р P Р
A
A
B
C
Answer: Respiration
Explanation:
Cellular respiration is the process by which nutrients such as glucose are broken down using oxygen to generate energy in the form of ATP, that is used to drive cellular processes.
ATP consists of an adenosine molecule bonded to three phosphate groups in a row. Energy from cellular respiration is stored in the bond between the 2nd and 3rd phosphate groups of ATP.
When the cell needs energy to do work, ATP loses its 3rd phosphate group, releasing energy stored in the bond that the cell can use to do work.
How is chromatin structurally different from chromosomes?
Answer:
The main difference between chromatin and chromosome is that chromatin consists of the unravelled condensed structure of DNA for the purpose of packaging into the nucleus whereas chromosome consists of the highest condensed structure of the DNA doublehelix
4. Earth's lower mantle lies belor what
Answer:
crust
Explanation:
Answer:
the crust
Explanation:
Earth's lower mantle lies just below the crust. In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks
What is the alien invasion in the Florida Everglades?
help! I'm grounded if I don't get a good grade on my test
Answer:
A is the answer
Explanation:
Hope I helped