The brain and spinal cord are covered and protected by three connective tissue layers called __________.
Final answer:
The three protective layers of connective tissue covering the brain and spinal cord are known as the meninges, consisting of the dura mater, arachnoid mater, and pia mater.
Explanation:
The brain and spinal cord are covered and protected by three connective tissue layers called meninges. These layers are, from the outermost to the innermost, the dura mater, the arachnoid mater, and the pia mater. The dura mater is a robust and durable membrane that provides a strong protective sheath over the brain and spinal cord. The arachnoid mater is a web-like layer that sits beneath the dura mater. Finally, the pia mater is a delicate membrane that closely envelopes the surface of the brain and spinal cord, following the contours of these structures closely. Between the arachnoid and pia mater lies the cerebrospinal fluid, which offers additional protection and cushioning to the central nervous system.
Blockage of a major artery is caused by a blood clot. these clots may form when ________.
Viruses have two main structures: a(n) _____ and genetic material.
Breah is a 24-year-old who wants to follow the recommendations of dietary guidelines for americans, 2010. she consumes no more than 1500 mg sodium/day; her cholesterol intake is about 400 mg/day; and her intake of folic acid is 400 mcg/day. according to this information, she should reduce her intake of
Olive oil, canola oil, and cashew nuts are rich in monounsaturated fatty acids. olive oil, canola oil, and cashew nuts are rich in monounsaturated fatty acids.
a. True
b. False
Which is true about acetylcholinesterase? which is true about acetylcholinesterase? agent that blocks ach from binding to cholinergic receptors on the motor end plate enzyme that normally breaks down ach at the motor end plate agent in nerve gas and pesticides that prevents the enzymatic breakdown of acetylcholine neurotransmitter that is secreted by somatic motor neurons at the nmj?
Acetylcholinesterase (AChE) or acetylhydrolasee is an enzyme that hydrolyzes the neurotransmitter acetylcholine. It is responsible for inactivating acetylcholine (Ach) when an electrical response of a muscle cell is turned off. Organophosphates are responsible for inhibiting AChE and thus precent inactivation of Ach.
Which of these is a process during which the hydrosphere interacts with the geosphere?
1. Solidification of water into ice
2. Absorption of rainfall by soil.
3. Evaporation of rainfall from puddles.
4. Condensation of water vapor into water.
A set of flashcards on prokaryotes is being sorted into piles. which definition should not be placed in the pile for high-gc gram-positive bacteria? a. they have a higher proportion of adenine–thymine than guanine–cytosine base pairs. b. they include several medically important bacteria. c. one species that is a human pathogen arose three million years ago in east africa. d. some species reproduce by forming chains of spores at the tips of filaments. e. they develop an elaborately branched system of filaments.
Groundwater _____.
A: is recharged by precipitation.
B: stays in one place and never moves.
C:is only found in areas with wet climates.
D:exists mostly as underground rivers and lakes.
Final answer:
Groundwater is primarily recharged by precipitation, moves through the subsurface, and is stored in aquifers. It is not confined to just staying in place, wet climates, or existing as underground rivers and lakes.
Explanation:
The correct answer to the question "Groundwater _____" is A: is recharged by precipitation. Groundwater occupies the zone of saturation and moves throughout the subsurface. It is replenished or recharged through processes like infiltration and seepage from surface water as well as precipitation. Contrary to some of the other options given, groundwater does not only stay in one place, nor is it only found in areas with wet climates. It is also not exclusively in the form of underground rivers and lakes but exists primarily in the pores of soil and rock formations known as aquifers. Groundwater plays a crucial role in the hydrologic cycle, contributing to the flow of streams and rivers and serving as a vital source of fresh water for various uses, including drinking and irrigation.
Trondheim, norway is located at approximately 63° n. despite its high latitude, it has a relatively moderate annual temperature pattern. what likely accounts for this moderation of temparature
Nucleotides are added to the growing dna strand during the _________ phase
Why is it important that antibodies have a symmetrical quaternary structure? to enable binding to many different antigens to create a variable region to create two identical binding sites for antigens to ensure a stable structure?
Final answer:
Antibodies have a symmetrical quaternary structure that is important for several reasons. It enables binding to many different antigens, creates a variable region for different specificities of binding, and ensures a stable structure for proper immune function.
Explanation:
Antibodies have a symmetrical quaternary structure for several important reasons. One reason is to enable binding to many different antigens. The symmetrical structure allows for the creation of a variable region within the antibody, which allows for different antibodies to have different specificities of binding. Additionally, the symmetrical structure creates two identical binding sites for antigens, which increases the efficiency and effectiveness of antibody-antigen interactions. Finally, having a symmetrical structure ensures a stable antibody structure, allowing for the proper functioning of the antibody in the immune response.
How do the sperm cells of nonvascular plants reach the egg cells during reproduction?
The sperm cells are blown by the wind and land on the egg cells.
The sperm cells swim to the egg cells through their watery surroundings.
The sperm cells are forcefully ejected from their capsules to hit the egg cells.
Sperm cells of nonvascular plants use water to swim towards the egg cells; they are motile due to flagella and attracted chemically to the eggs for fertilization. Hence, option 2 is correct.
Nonvascular plants, such as mosses and liverworts, release sperm cells that are equipped with flagella. These flagellated sperm cells are motile and can swim through the water film or droplets that are found in their moist environments. The sperm are chemically attracted to the egg cells and swim towards them to achieve fertilization. This means that for nonvascular plants, water is an essential medium for successful reproductive cycles, unlike some seed plants that use a pollen tube in a process called siphonogamy or rely on pollinators. It's important to note that in these nonvascular plants, reproduction cannot occur without water as the sperm are incapable of reaching the egg cells through wind or being forcibly ejected as they rely on swimming.
Which of the following compounds may be polymers
A. Carbohydrates
B. Nucleic acids
C. Proteins
D. All of these
The option (D) is correct. All of these are polymers.
What do you mean by polymers?A polymer is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life.
Moreover, polymer is a large molecule or a macromolecule which essentially is a combination of many subunits. The term polymer in Greek means 'many parts'. Polymers can be found all around us. From the strand of our DNA, which is a naturally occurring biopolymer, to polypropylene which is used throughout the world as plastic.
Therefore, examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.
Learn more about polymers:
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When the protons are concentrated on one side of the membrane, they pass through golgi complex and form what?
Which of these statements are true about the Mycenaeans
Which statement about how organisms depend on abiotic factors in an aquatic ecosystem is not true? a. most living organisms can survive in environments with several different temperature and salinity levels b. both aquatic plants and animals depend on dissolved oxygen for respiration c. abiotic factors that impact an aquatic ecosystem include temperature, salinity, flow, and dissolved oxygen in the water d. abiotic factors of an aquatic ecosystem determine what kind of life can exist in that environment
In _____, the alveolar walls break down, adjacent alveoli fuse, and the lungs lose their elasticity.
Type 11b fast twitch muscle fibers are those used in a short sprint
a. True
b. False
Answer:
true
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Explanation:
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An intuitive hunch is most likely to be accurate when:
What is one result of a chemical change?
A.Energy is created.
B.A new material is formed.
C.Materials change from one state to another.
D.Elements are permanently destroyed.
Early elements of the cell theory followed soon after the development of hooke's light microscope. what does this relationship suggest about the evolution of the cell theory since hooke?
What are 2 organelles that are in a plant cell but not anima;?
A grocery store newspaper claims that apple cider and honey can cure cancer, bronchitis, acne, bad breath, heart disease, athlete's foot, asthma, the common cold, and other ailments. a shopper decides to consume apple cider and honey exclusively. what questions should the shopper have asked before adopting the apple cider and honey diet?
N pea plants there is complete dominance for the trait of flower color. the p allele produces purple flowers and p produces white flowers. a cross of two pea plants which are both heterozygous for flower color will produce offspring with the genotypic ratio
Which part of an enzyme molecule binds to its associated substrate?
Which is not an infection caused by a fungus?
a. athlete's foot
b. thrush
c. trachoma
d. vaginal yeast infection?
Okay so I think this is a trick question?
Risk is __________.
A. the probability that something unwanted will happen
B. the probability that something will happen
How do enzymes maintain homeostasis at the cellular level?
The kingdoms included in the linnaeus system of classification are