Answer:
Vagus nerve.
Explanation:
Vagus nerve is the tenth cranial nerve and largest among all the cranial nerves. This nerve transmits information to or from the surface of brain to the tissue or organ.
Vagus nerve is responsible for regulation of various functions like sweating, blood pressure, digestion, peristalsis and cardiac rhythmicity. Cranial nerve innervates in different system of body like digestion, blood pressure and cardiac rhythm.
Where does spongy bone occur in the skeleton?
spongy bone is found in the bones of the skull, sternum, vertebrae, the pelvis, the lining of the marrow cavity and the epiphysis.
Why is the action of phagocytes considered a nonspecific response?
Answer:
Since phagocytes are effective against any type of infectious/toxic agent.
Explanation:
Phagocytes are the cells of the immune system that are involved in the non-specific immune response. These cells serve to engulf and kill any pathogenic or infectious microbe that has entered the body. Since phagocytes do not require the presence of specific antigens or pathogens to mount the immune response, their action is "non-specific response".
Answer:
D. It is not a response to a specific type of pathogen.
Explanation:
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Name, in order, the five main components of a reflex arc. Briefly explain what each component is or does.
Answer:
The five parts of reflex arc are sense organs (receptor) followed by sensory neuron, then the inter neuron, motor neuron and lastly by the muscles/body organs.
Explanation:
The five parts of reflex arc are -
a) The first part is the receptor which comprises of sense organ whose function is to sense the impulse and pass the perceived information to the sensory neuron.
b) The sensory neuron then carry the information from sense organs to the central nervous system (CNS) for processing.
c) The inter neurons carry the information from CNS to the motor neuron
d) After receiving processed information/ action potential from inter neuron it is sent to the other parts of the body and away from the CNS .
e) Lastly, the muscles/body organs which receive information from the motor neuron, enact as directed by the CNS as a response to the impulse received.
What is most common white blood cell?
A. lymphocyte
B. neutrophil
C. basophil
D. monocyte
Your skin has multiple layers of epithelial cells. The apical cells (closest to the surface, "top") are "flat" and the basal cells (farther from surface bottom") are "as tall as they are wide". Another way to describe this epithelium would be to state:
a. Simple columnar epithelium
b. Simple cuboidal epithelium
c. Simple squamous epithelium
d. Stratified columnar epithelium
e. Stratified cuboidal epithelium
f. Stratified squamous epithelium
g. Simple transitional epithelium
Answer:
c. Simple squamous epithelium ?
Explanation:
The apical cells are "as tall as they are wide". Another way to describe this epithelium would be to state simple squamous epithelium. Thus, option C is correct.
What is epithelium tissue?
The epithelium tissue has been defined as the form of the tissue present in the body and it plays a vital role in the covering of all internal as well as external surface of body, which includes hollow organs and lines body cavity. The structure of the epithelial cells are said to be combined together by tight junctions as well as adhering junction and attached to extra cellular matrix.
Tissue is the combined structure of cell and later tissue combined together to form organ and than organ system is formed to perform various functions of the body. The structure of epithelial cells are they combined together by tight junctions as well as adhering junction and attached to extra cellular matrix.
Therefore, The apical cells are "as tall as they are wide". Another way to describe this epithelium would be to state simple squamous epithelium. Thus, option C is correct.
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The frequency of a deleterious recessive disease in a large, randomly-mating population is 1 in 1000. Calculate the probability of an individual being a carrier for this recessive disease?
a) 0.74
b) 0.06
c) 0.03
d) 0.001
e) All individuals will be homozygous
Answer:
The frequency of carriers for the recessive disease is 0.062.
Explanation:
The frequency of recessive allele in the generation is 1 in 1000.
Let the frequency be q²=1/1000.
q=√1/1000.
q=0.032.
Let p be the frequency of dominant allele
p+q=1 ( According to hardy weinberg equillibrium)
p=1-q
p= 1-0.032
p=0.968.
The frequency of carriers for the recessive disease = 2×p×q
=2×0.032×0.968
=0.062.
Why are infections more common with compound fractures than with simple fractures?
Answer: Compound fractures = open fractures
Explanation: This means that the area is more suseptable to infection. Because it is open, there is more room for an infection to burrow in and spread.
If a transgene is inserted into an animal embryo
only the non-reproductive cells should contain the transgene DNA.
the animal should become sterile as an adult.
every cell should contain the transgene DNA.
the transgene protein will be expressed in all cells.
only the sperm and egg cells should contain the transgene DNA.
Answer:
Every cell should contain the transgene DNA.
Explanation:
The embryo is the very early stages of growth and development of an organism. An embryo develops from a zygote and contains about 16 cells. Inserting transgenes in these cells, therefore, will ensure that all the cells that divide from the embryo by mitosis have the transgene. The whole organism will, therefore, bear the transgene including its gametes. This foreign gene will, therefore, be inherited by the offspring of the organism.
Which muscle is responsible for inhalation ?
Answer:
The muscles of respiration are those muscles that contribute to inhalation and exhalation, by aiding in the expansion and contraction of the thoracic cavity. The diaphragm and, to a lesser extent, the intercostal muscles drive respiration during quiet breathing.
the answer is diaphragm
Which of the following would not be involved in performing synergism when making a fist?
a. Extensor Carpi Radialis Longus
b. Extensor Digitorium
c. Extensor Carpi Radialis Brevis
d. Extensor Carpi Ulnaris
Final answer:
The muscle that would not be involved in performing synergism when making a fist is the b) extensor digitorum, as it is responsible for extending the fingers and hand, which is the opposite motion of making a fist.
Explanation:
When making a fist, muscles called synergists work together to perform the action required. The extensor digitorum is involved in extending the fingers and the hand at the wrist, not in flexing them to make a fist. The muscles that would be involved in making a fist are the flexors. Therefore, the muscle that would not be involved in performing synergism when making a fist is: b. Extensor Digitorium
The other muscles listed are extensors of the wrist and would not actively contribute to the flexion required for making a fist. To clarify, the extensor muscles listed (including the extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris) primarily act to extend the wrist and fingers, which is the opposite motion required for making a fist.
On which bone does Sella Turcica occurs?
Answer:
Sella Turcica occurs on the sphenoid bone.
Explanation:
Sella Turcica is the saddle shaped bone of the skull and acts as cephlaometric landmark. The inner aspect of sella turcica consists of hypophysis or pituitary gland.
Sella Turcica is present in the sphenoid bone of the skull just behind the tuberculum sellae and chiasmatic groove. The shrink pituitary gland is indicated by the empty Sella Turcica.
On which bone does Jugular Foramen occurs?
Answer:
The petrous temporal bone
Explanation:
Jugular Foramen is a cavity or aperture which is formed at the junction of two bones of the skull. Jugular Foramen occurs at the junction of the occipital bone and petrous temporal bone. The petrous temporal bone has carotid foramen. The Jugular Foramen is located posterior to the carotid foramen but anterior to the occipital bone of the skull.
A long, thin, oblique muscle of anterior thigh
a. Sartorius
b. Masseter
Answer:
The answer is A Sartorius
Explanation:
Check out this quizlet. It helps.
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Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________. A. oligodendrocytes B. microglia C. astrocytes D. Schwann cells
Answer:
Astrocytes
Explanation:
Astrocytes are star shaped glial cells and are the most abundant glial cells in the group. Thy have gap junctions with pottasium and calcium channels that refulate the concentration of the ions in the environment creating a buffer that ensures the neurons function effectively during saltatory condution when ions are released outside their membrane. They also capture any unused neurotransmitters during cell communication by neurons at the synaptic junctions.
As you lift a heavier weight, what is happening? (Select all that apply.) a. You increase the number of muscle fibers activated in each motor unit. b. You increase the number of motor units that are active in each activated muscle. c. You increase the frequency of action potentials in your motor neurons. d. You increase the diameter of muscle fibers activated in a motor unit.
CD8 helps with recognition of which of the following molecules on the surface of a cell?
Question 12 options:
A)
TLRs
B)
selectins
C)
MHCII
D)
MHCI
E)
BCRs
Answer:
MHCI
Explanation:
Major histocompatibility complex I (MHCI) is present on the nucleated cells of the body. Endogenous pathway represents the pathway of MHC class I molecules.
MHCI display peptide fragment of proteins to the cytotoxic T cells with the help of CD8 ( Cluster of differentiation). CD8 binds with the MHCI and expressed on the surface of cytotoxic T cells.
Thus, the correct answer is option (D).
48) Capillaries lack smooth muscle and elastic or fibrous tissue reinforcement. Instead, theirwalls consist of ________, supported on a cellular matrix called ________
There’s no fill in words ?
Capillaries are formed from a single layer of endothelial cells, supported by a basement membrane. This structure allows them to be flexible, yet strong, and permeable to materials passing through them.
Explanation:Capillaries, unlike other types of blood vessels, lack smooth muscle and elastic or fibrous tissue reinforcement. Instead, their walls are composed of endothelial cells, which are supported on a cellular matrix known as the basement membrane or basal lamina.
In a large capillary, several endothelial cells may line the lumen, while in a small capillary there may be only a single cell layer that wraps around to contact itself. The basement membrane, which binds the endothelium to the connective tissue, provides strength while maintaining flexibility. It is permeable, allowing materials to pass through it.
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1. Certain species of fish are unsafe to consume in high quantities because these fish A. ingest other fish that are poisonous to humans. B. contain vitamins that aren't water-soluble and can cause toxicity. C. are endangered species. D. have high levels of metals in them from cancer-causing pesticides.
Answer:
D
Explanation:
I would say D because chemicals from farms run off into local waters where you catch fish from. These chemicals were not made for human consumption, some were made to keep animals off farms.
Ingest other fish that are poisonous to humans, so that they are poisonous and unsafe to consume.i.e, option A is correct.
What is food chain?Food chain, in ecology, the sequence of transfers of matter and energy in the form of food from organism to organism. Food chains intertwine locally into a food web because most organisms consume more than one type of animal or plant.
In a food chain a primary consumers eats the producer, a secondary consumer eats the primary consumer and then the tertiary consumer eats the secondary consumer. The level of poison will increase as it goes down the food chain so the tertiary consumer will have the highest amount of toxins in it.
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Immoveable joints are
a. diarthrotic
b. synathrotic
c. amphiarthrotic
d. syndesmose
Answer:
D syndesmose
Explanation:
An immovable joint connects the ends of the bones by a tough fibrous tissue.
In the alveoli, you would expect to find the alveolar:
a. PO2 greater than the capillary PO2 before exchange.
b. PCO2 greater than the capillary PCO2 before exchange.
c. PO2 greater than the alveolar blood after exchange.
d. All of the above.
Answer:
A
Explanation:
Before exchange, it is expected that the capillaries (that have deoxygenated blood) will have more carbon dioxide while the lungs will have more oxygen. This allows for oxygen to diffuse into the capillaries while carbon dioxide diffused into the lungs during the exchange.
The specific color of blood is most closely associated to
A) Its pH
B) Its oxygen content
C) Its hematocrit
D) The age of the individual
Answer:
B. It's oxygen content
Explanation:
The specific color of blood is most closely associated to its oxygen content because the more oxygen present in your blood, the more dark red your blood would be...
If you have less oxygen in your blood, the blood wouldn't be as dark red...
What is the blind spot of the retina?
Answer:
The region of retina devoid of photoreceptor cells (rod cells and cone cells)
Explanation:
The retina is the layer of the eyeball and is packed with rod cells and cone cells responsible for night and day vision respectively. The blind spot is the region in the retina where no rod cells and cone cells are present.
Absence of these photoreceptor cells ensures that no vision is formed in this part of the retina. However, the blind spot serves as the site from where the optic nerve passes through the retina and serves to transmit the impulse to the brain.
What is this bug called?
Answer:
ASSASSIN BUG
When RBCs are placed in a hypotonic solution, they undergo
a. crenation
b. hemolysis
c. isotonicity
d. homeostasis
Answer: b. hemolysis
Explanation:
A hypotonic solution is the one where the solute concentration is less than that of the RBCs. Therefore, the solvent will enter inside the RBCs due to osmotic pressure. This will lead to the increase in concentration of the solvent inside the cells this will lead to the swallowing of the cell and with generation of the high internal pressure inside the cell the cell will burst. This will result in hemolysis.
What valve prevents back flow into the left ventricle of the heart?
A) pulmonary valve
B) mitral valve
C) tricuspid valve
D) aortic valve
Answer:
Option D, aortic valve
Explanation:
The location of aortic valve i.e between the aorta and left ventricle, allows it to stop the blood from flowing back into the left ventricle.
The other options are incorrect as -
Pulmonary valve being located between the pulmonary artery and right ventricle, stop the blood from flowing back into the right ventricle.
The tricuspid valve and mitral valve stops the blood from flowing back into the right atria and left atria respectively.
Hence, option D is correct.
As the popliteal vein ascends the leg, it becomes the
A. peroneal vein.
B. saphenous vein.
C. common iliac vein
D. femoral vein.
E. deep femoral vein.
Answer:
D. Femoreal vein.
Explanation:
Close to the popliteal artery, the popliteal vein extends and transports blood from the knee (and also the muscles from the thigh and calf) once again up to the heart. This vein has its origin in the joint between both the anterior and posterior tibial veins, proximal to the knee.
Also, the popliteal vein starts its extension from the popliteal artery, which can be found behind the knee, and the drainage of the peroneal vein is performed by it prior to reaching the knee joint, where the popliteal vein becomes known as the femoral vein.
As the popliteal vein ascends the leg, it becomes the D. femoral vein. This is the correct option among the choices provided.
The popliteal vein is a deep vein that drains the lower leg and knee area. When it travels upwards in the leg, the popliteal vein becomes the femoral vein as it enters the thigh region. The femoral vein plays a crucial role in the circulatory system as it drains the upper leg and receives blood from several other veins, including the great saphenous vein, the deep femoral vein, and the femoral circumflex vein. Upon reaching the inguinal ligament, the femoral vein continues as the external iliac vein, which then contributes to the common iliac vein. Confusion may arise among the terminology, such as with the peroneal vein and others, but knowledge of vascular anatomy makes clear that the direct upward continuation of the popliteal vein is indeed the femoral vein.
List the types of proteins found in the cell membrane.
What is the densest layer
Answer:
Explanation:
The densest layer is the solid metal inner core, the mantle is of intermediate density, and the least dense layer is the lithosphere, particularly the continental lithosphere.
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What happens if calorie intake exceeds TDEE for a significant period of time?
Answer:
The individual gains weight if if calorie intake exceeds TDEE for a significant period of time.
Explanation:
TDEE ( Total daily energy expenditure) is the number of calories burnt in the day. TDEE involves the energy from the basal metabolism and physical activity.
The value of TDEE exceeds the value of basal metabolic rate. If calories intake in an individual exceeds the TDEE, an individual body's gain weight for the significant period of time.
Select the correct answer.
Which of the following statements is a scientific claim?
A.
The early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water.
B.
The mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency.
C.
Planet Earth is abundant in water, but there is no way to scientifically determine from where Earth's water originated.
D.
Earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea.
Answer:
B maybe
Explanation:
Answer:
Option A, The early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water.
Explanation:
A scientific claim is a evidence based statement that is tested and tried through experiment and reasoning.
Among all the given options none of the statement except the option A has a logical reasoning support or backup.
However, in option A the statement "old object in solar system are abundant of water" is based on the reason that "early solar systems had large amount of water"
Thus, option A is correct