Lsw Licensure Exam Quiz: MCQ!
Questions and Answers
- 1.
The skeletal system is composed of bones, cartilage, ligaments and joints.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The skeletal system is indeed composed of bones, cartilage, ligaments, and joints. Bones provide support and structure to the body, cartilage acts as a cushion between bones, ligaments connect bones to each other, and joints allow for movement. Therefore, the statement is true.Rate this question:
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- 2.
The fibrous membrane covering bone that is the bone's life support system is called the intraosteum.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The fibrous membrane covering bone that is the bone's life support system is actually called the periosteum, not the intraosteum. The periosteum is a dense connective tissue membrane that surrounds the outer surface of bones, providing them with blood vessels, nerves, and nutrients necessary for their growth and repair. The intraosteum does not exist and is not involved in bone support or function. Therefore, the statement is false.Rate this question:
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- 3.
The two regions of the skeleton are the axial and the appendicular skeleton.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the skeleton is divided into two main regions: the axial skeleton and the appendicular skeleton. The axial skeleton includes the skull, vertebral column, and ribcage, which provide support and protection for the vital organs. On the other hand, the appendicular skeleton consists of the bones of the limbs, shoulder girdle, and pelvic girdle, which are responsible for movement and locomotion. Therefore, the given statement accurately describes the two regions of the skeleton.Rate this question:
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- 4.
The bones of the skull, thorax, and vertebral column and the hyoid bone comprise the appendicular skeleton.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The given statement is false. The bones of the skull, thorax, vertebral column, and hyoid bone actually comprise the axial skeleton, not the appendicular skeleton. The axial skeleton includes the bones that form the central axis of the body, while the appendicular skeleton includes the bones of the limbs and their associated girdles.Rate this question:
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- 5.
One of the functions of the skeletal system is to restore vital minerals.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The skeletal system does indeed play a role in restoring vital minerals. It stores minerals such as calcium and phosphorus, which are crucial for various bodily functions. When the body needs these minerals, the skeletal system releases them into the bloodstream. Additionally, the bones themselves serve as a reservoir for minerals, ensuring that the body has a constant supply to maintain proper functioning. Therefore, the statement "One of the functions of the skeletal system is to restore vital minerals" is true.Rate this question:
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- 6.
The intercartilaginous ligament is a tough membrane that interconnects select bones, attaching to their periosteum.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The given statement is false. The correct answer is false because there is no such thing as the "intercartilaginous ligament." The ligaments in the body connect bones, not cartilage. Additionally, ligaments do not attach to the periosteum, which is the outer layer of bone.Rate this question:
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- 7.
Spongy bone is found in the center of long bones, typically filled with red and yellow bone marrow.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Spongy bone refers to the inner layer of bone tissue found in the center of long bones. It is characterized by a porous and latticed structure, which provides strength and support to the bone while also reducing its weight. This type of bone tissue contains both red and yellow bone marrow, which are responsible for the production of blood cells and fat storage respectively. Therefore, the statement that spongy bone is found in the center of long bones and is typically filled with red and yellow bone marrow is true.Rate this question:
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- 8.
The two girdles in the axial skeleton are the shoulder girdle and the pelvic girdle.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the axial skeleton does not include the shoulder girdle and the pelvic girdle. The axial skeleton consists of the skull, vertebral column, and rib cage, while the shoulder girdle and pelvic girdle are part of the appendicular skeleton.Rate this question:
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- 9.
The plane that divides the body into superior and inferior halves is the...
- A.
Midsagittal (median) plane
- B.
Frontal (coronal) plane
- C.
Transverse (horizontal) plane
- D.
Sagittal plane
Correct Answer
C. Transverse (horizontal) planeExplanation
The correct answer is the transverse (horizontal) plane. This plane divides the body into superior (upper) and inferior (lower) halves. It is perpendicular to both the sagittal and frontal planes.Rate this question:
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- 10.
The plane that divides the body into anterior and posterior halves is the...
- A.
Midsagittal (median) plane
- B.
Frontal (coronal) plane
- C.
Tranverse (horizontal) plane
- D.
Sagittal plane
Correct Answer
B. Frontal (coronal) planeExplanation
The plane that divides the body into anterior and posterior halves is the frontal (coronal) plane. This plane runs vertically from side to side, dividing the body into front and back sections. It is perpendicular to the sagittal plane, which divides the body into left and right halves. The transverse (horizontal) plane divides the body into upper and lower sections, and the midsagittal (median) plane divides the body into equal left and right halves. However, neither of these planes specifically divides the body into anterior and posterior halves, making the frontal (coronal) plane the correct answer.Rate this question:
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- 11.
If you were to assume the anatomical position, you would do which of the following?
- A.
Lie face down with both feet hip distance apart, toes pointing downward
- B.
Lie flat on your back, with the palms of your hands flat on the floor and your head looking over your right shoulder
- C.
Stand erect and face forward, with your palms facing forward with the thumbs to the side, and your feet about hip distance apart with toes pointing forward
- D.
Stand erect and face forward, with your palms facing each other and feet about hip distance apart with the toes pointing to the side
Correct Answer
C. Stand erect and face forward, with your palms facing forward with the thumbs to the side, and your feet about hip distance apart with toes pointing forwardExplanation
Assuming the anatomical position means standing upright with the body facing forward, arms at the sides, and palms facing forward with the thumbs pointing to the side. The feet should be about hip distance apart with the toes pointing forward. This position is commonly used as a reference point in anatomy and is important for accurate descriptions and measurements of the human body.Rate this question:
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- 12.
Which of the following is in the proper order from least complex to most complex?
- A.
Cells, tissues, membranes, organs, organ systems, organism
- B.
Cells, chemicals, organs, tissues, organ systems
- C.
Chemicals, cells, tissues, organs, organ systems, organism
- D.
Molecules, tissues, cells, organism
Correct Answer
C. Chemicals, cells, tissues, organs, organ systems, organismExplanation
The correct answer is "Chemicals, cells, tissues, organs, organ systems, organism". This is the proper order from least complex to most complex. Chemicals are the basic building blocks of life, followed by cells, which are made up of chemicals. Tissues are formed by groups of cells that work together to perform a specific function. Organs are composed of different types of tissues that work together to perform a specific function. Organ systems are made up of multiple organs that work together to perform a specific function. Finally, an organism is a complete living being that consists of all the previous levels of organization working together.Rate this question:
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- 13.
What is the fundamental unit of all living organisms?
- A.
Atom
- B.
Molecule
- C.
Tissue
- D.
Cell
Correct Answer
D. CellExplanation
The fundamental unit of all living organisms is the cell. Cells are the building blocks of life and are responsible for carrying out all the essential functions necessary for an organism to survive and thrive. They are the smallest structural and functional unit of life, capable of self-replication and performing specialized tasks. Cells come together to form tissues, which then make up organs and organ systems. Therefore, the cell is the correct answer as it is the basic unit of life.Rate this question:
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- 14.
Which of the following quadrants contains the liver?
- A.
Left lower quadrant
- B.
Left upper quadrant
- C.
Right lower quadrant
- D.
Right upper quadrant
Correct Answer
D. Right upper quadrantExplanation
The liver is located in the right upper quadrant of the abdomen. This is because the liver is the largest solid organ in the body and is situated on the right side of the body, just below the diaphragm. It extends across the midline of the body, with a small portion of it also present in the left upper quadrant. However, the majority of the liver is found in the right upper quadrant.Rate this question:
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- 15.
When oriented away from the midline of the body, we refer to it as...
- A.
Lateral
- B.
Anterior
- C.
Posterior
- D.
Inferior
Correct Answer
A. LateralExplanation
When an object is oriented away from the midline of the body, it is referred to as "lateral." This means that the object is positioned towards the side of the body, away from the center.Rate this question:
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- 16.
________ describes the armpit region. Blank is...
- A.
Axillary
- B.
Antebrachial
- C.
Brachial
- D.
Antecubital
Correct Answer
A. AxillaryExplanation
The term "axillary" refers to the armpit region. It is derived from the Latin word "axilla" which means armpit. The axillary region is located between the upper arm and the side of the chest. It contains important structures such as lymph nodes, blood vessels, and nerves.Rate this question:
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- 17.
The Greek root derm- means...
- A.
Skin
- B.
Follicles
- C.
Nails
- D.
Hair
Correct Answer
A. SkinExplanation
The Greek root "derm-" refers to the skin. This root is commonly used in medical terms related to the skin, such as dermatology (the study of skin) and dermatitis (inflammation of the skin). The word "derm-" itself is derived from the Greek word "derma" which means "skin". Therefore, the correct answer is "Skin".Rate this question:
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- 18.
Which of the following cells gives color to the skin and serves to decrease the amount of ultraviolet light that can penetrate into deeper layers of the skin?
- A.
Keratinocytes
- B.
Mesocytes
- C.
Astrocytes
- D.
Melanocytes
Correct Answer
D. MelanocytesExplanation
Melanocytes are the cells responsible for giving color to the skin and producing melanin, the pigment that determines skin, hair, and eye color. Melanin also serves as a protective mechanism against the harmful effects of ultraviolet (UV) light. It absorbs and scatters UV radiation, preventing it from penetrating deeper layers of the skin where it can cause damage and increase the risk of skin cancer.Rate this question:
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- 19.
Which layer is known as the true skin?
- A.
Epidermis
- B.
Subdermis
- C.
Dermis
- D.
Hypodermis
Correct Answer
C. DermisExplanation
The dermis is known as the true skin because it is the layer of skin that lies beneath the epidermis. It is composed of connective tissue and contains blood vessels, nerves, sweat glands, and hair follicles. The dermis provides strength and elasticity to the skin, and is responsible for regulating body temperature and protecting the body from external factors. It also houses sensory receptors that allow us to feel touch, pressure, and pain.Rate this question:
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- 20.
Collagen and elastin are found in which layer of skin?
- A.
Epidermis
- B.
Dermis
- C.
Hypodermis
- D.
Mesodermis
Correct Answer
B. DermisExplanation
Collagen and elastin are found in the dermis layer of the skin. The dermis is the middle layer of the skin, located beneath the epidermis. It is composed of connective tissue that provides strength, elasticity, and support to the skin. Collagen is a protein that gives the skin its structure and helps in wound healing, while elastin allows the skin to stretch and bounce back to its original shape. Therefore, the presence of collagen and elastin in the dermis is crucial for maintaining the skin's integrity and elasticity.Rate this question:
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- 21.
Which are pouch-like structures in the skin from which hair grows?
- A.
Follicles
- B.
Indentions
- C.
Sacs
- D.
Cysts
Correct Answer
A. FolliclesExplanation
Follicles are pouch-like structures in the skin from which hair grows. These structures are responsible for producing and nourishing the hair shaft. They are located within the dermis layer of the skin and consist of a hair bulb, which contains the cells that produce the hair, and a root sheath, which surrounds the hair shaft. The follicles play a crucial role in hair growth and are essential for maintaining healthy hair.Rate this question:
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- 22.
What is another term used to describe the subcutaneous layer?
- A.
Epidermis
- B.
Hypodermis
- C.
Subdermis
- D.
Mesodermis
Correct Answer
B. HypodermisExplanation
The correct answer is "Hypodermis." The hypodermis is another term used to describe the subcutaneous layer. It is the innermost layer of the skin and is located beneath the dermis. The hypodermis consists of adipose tissue, blood vessels, and nerves, and it serves various functions such as insulation, cushioning, and energy storage.Rate this question:
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- 23.
Which layer of skin contains blood vessels, many nerve receptors, hair follicles, and skin glands?
- A.
Epidermis
- B.
Mesodermis
- C.
Hypodermis
- D.
Dermis
Correct Answer
D. DermisExplanation
The dermis is the correct answer because it is the layer of skin that contains blood vessels, nerve receptors, hair follicles, and skin glands. The epidermis is the outermost layer of skin and does not contain these structures. The mesodermis and hypodermis are not layers of the skin, but rather layers of tissue beneath the skin.Rate this question:
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- 24.
Which receptors are often called the "cold receptors"?
- A.
Pacinian corpuscles
- B.
Ruffini end organs
- C.
Krause end bulbs
- D.
Meissner's corpuscles
Correct Answer
C. Krause end bulbsExplanation
Krause end bulbs are often called the "cold receptors" because they are sensory receptors that are particularly sensitive to cold temperatures. These receptors are found in the skin and help to detect and transmit signals related to cold sensations to the brain.Rate this question:
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- 25.
Which skin region is relatively avascular?
- A.
Epidermis
- B.
Dermis
- C.
Hypodermis
- D.
Endodermis
Correct Answer
A. EpidermisExplanation
The epidermis is the outermost layer of the skin and is relatively avascular, meaning it lacks blood vessels. Instead, it receives its nutrients and oxygen from the underlying dermis through diffusion. This avascularity is important for the function of the epidermis, as it allows for efficient exchange of gases and nutrients with the underlying tissues.Rate this question:
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- 26.
The hollow space within the center of the diaphysis is...
- A.
Haversian canal
- B.
Volkman's canal
- C.
Periosteal cavity
- D.
Medullary cavity
Correct Answer
D. Medullary cavityExplanation
The medullary cavity is the correct answer because it refers to the hollow space within the center of the diaphysis, which is the long shaft of a bone. This cavity is filled with marrow and is responsible for producing and storing blood cells. The Haversian canal and Volkman's canal are both related to the bone's vascular system, while the periosteal cavity refers to the space between the bone and the periosteum.Rate this question:
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- 27.
What is the long cylindrical shaft of the bone?
- A.
Epiphysis
- B.
Diaphysis
- C.
Bony markings
- D.
Periosteum
Correct Answer
B. DiaphysisExplanation
The diaphysis is the long cylindrical shaft of a bone. It is the main portion of the bone, located between the two ends called epiphyses. The diaphysis is composed of compact bone, which provides strength and support to the bone. It contains the medullary cavity, which is filled with yellow bone marrow in adults. The diaphysis also serves as a site for muscle attachment, allowing for movement and mobility.Rate this question:
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- 28.
What are the two ends of a long bone?
- A.
Epiphyses
- B.
Diaphyses
- C.
Surface markings
- D.
Periosteum
Correct Answer
A. EpiphysesExplanation
The two ends of a long bone are called epiphyses. Epiphyses are the rounded, bulbous parts of the bone that are located at each end. They are covered with cartilage and serve as the attachment points for tendons and ligaments. The epiphyses play a crucial role in bone growth and development, as they contain the growth plates where new bone cells are formed.Rate this question:
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- 29.
Minute vascular canals running longitudinally down the bone are the...
- A.
Volkman's canals
- B.
Periosteal cavities
- C.
Medullary cavities
- D.
Haversian canals
Correct Answer
D. Haversian canalsExplanation
Haversian canals are minute vascular canals running longitudinally down the bone. They are responsible for carrying blood vessels, nerves, and lymphatic vessels through the bone. These canals are surrounded by concentric layers of bone tissue called lamellae and are the basic structural unit of compact bone.Rate this question:
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- 30.
What is a meeting place for bones at which joint movement occurs?
- A.
Periosteum
- B.
Hemopoiesis
- C.
Diaphysis
- D.
Articulation
Correct Answer
D. ArticulationExplanation
Articulation refers to the meeting place for bones where joint movement occurs. It is the point where two or more bones come together and interact, allowing for various types of movement such as flexion, extension, rotation, and more. The articulation allows for the bones to connect and form a joint, enabling mobility and flexibility in the body.Rate this question:
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- 31.
Small, round bones embedded in tendons are classified as which of the following categories?
- A.
Flat
- B.
Irregular
- C.
Short
- D.
Sesamoid
Correct Answer
D. SesamoidExplanation
Small, round bones embedded in tendons are classified as sesamoid bones. Sesamoid bones are unique because they develop within tendons or in locations where tendons pass over joints. They are typically small and round, resembling a sesame seed, hence the name "sesamoid." These bones provide protection, improve joint stability, and enhance the mechanical advantage of the associated muscles. Examples of sesamoid bones in the human body include the patella (kneecap) and the small bones found in the hands and feet.Rate this question:
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- 32.
Which of the following systems of canals connects to Haversian canals and runs horizontally through bone?
- A.
Golgi canal
- B.
Volkman's canal
- C.
Osteal canal
- D.
Medullary canal
Correct Answer
B. Volkman's canalExplanation
Volkman's canal is the correct answer because it is a system of canals that connects to Haversian canals and runs horizontally through bone. The other options, Golgi canal, Osteal canal, and Medullary canal, do not fulfill these criteria.Rate this question:
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- 33.
Freely movable joins are classified as...
- A.
Synarthrotic
- B.
Amphiarthrotic
- C.
Diarthrotic
- D.
Triarthrotic
Correct Answer
C. DiarthroticExplanation
Diarthrotic joints are freely movable joints. These joints allow for a wide range of movement and are found in the limbs, such as the shoulder and hip joints. Synarthrotic joints are immovable, while amphiarthrotic joints allow for limited movement. Triarthrotic is not a recognized classification for joints. Therefore, the correct answer is diarthrotic.Rate this question:
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- 34.
Hip and shoulder joints are examples of synovial joints that offer the greates range of motion and are commonly know as...
- A.
Hinge joints
- B.
Pivot joints
- C.
Saddle joints
- D.
Ball and socket joints
Correct Answer
D. Ball and socket jointsExplanation
Hip and shoulder joints are examples of ball and socket joints. These joints allow for the greatest range of motion in the body, as they can move in multiple directions, including rotation. The rounded head of one bone fits into the socket of another bone, allowing for a wide range of movement. This type of joint is commonly found in the hip and shoulder, where the need for mobility is essential for activities such as walking, running, and throwing.Rate this question:
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- 35.
Medial or inward rotation of the forearm is called...
- A.
Pronation
- B.
Inversion
- C.
Supination
- D.
Eversion
Correct Answer
A. PronationExplanation
Medial or inward rotation of the forearm is referred to as pronation. This movement involves the rotation of the radius bone over the ulna bone, causing the palm to face downwards or posteriorly. During pronation, the hand rotates towards the midline of the body. This movement is commonly observed when turning the palm to face downwards, such as when pouring water from a jug or turning a doorknob with the palm facing downwards.Rate this question:
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- 36.
Flexion of the foot dorsally so that the toes are moving toward the shin is called...
- A.
Plantarflexion
- B.
Dorsiflexion
- C.
Inversion
- D.
Eversion
Correct Answer
B. DorsiflexionExplanation
Dorsiflexion refers to the movement of the foot where the toes are flexed upwards towards the shin. This movement is opposite to plantarflexion, where the toes are pointed downwards. Inversion refers to the movement where the sole of the foot is turned inward, while eversion refers to the movement where the sole of the foot is turned outward. Therefore, the correct answer is dorsiflexion, as it describes the specific movement mentioned in the question.Rate this question:
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- 37.
Elevation of the medial edge of the foot so that the sole is turned inward (or medially) is called...
- A.
Eversion
- B.
Circumduction
- C.
Inversion
- D.
Rotation
Correct Answer
C. InversionExplanation
Inversion refers to the elevation of the medial edge of the foot, causing the sole to turn inward or medially. This movement is commonly observed when someone is standing on the outer edge of their foot, with the inner edge lifted off the ground. It is the opposite of eversion, which involves the elevation of the lateral edge of the foot, causing the sole to turn outward or laterally. Circumduction refers to a circular movement of a body part, while rotation refers to the movement of a bone around its own axis.Rate this question:
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- 38.
Circular movemnt created when a bone moves around its own central axis is called...
- A.
Rotation
- B.
Protraction
- C.
Circumduction
- D.
Retraction
Correct Answer
A. RotationExplanation
Rotation is the correct answer because it refers to the circular movement created when a bone moves around its own central axis. This movement can be seen in joints such as the shoulder and hip, where the bone rotates internally or externally.Rate this question:
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- 39.
The sarcoplasmic reticulum stores and releases which ion?
- A.
Phosphorus
- B.
Potassium
- C.
Sodium
- D.
Calcium
Correct Answer
D. CalciumExplanation
The sarcoplasmic reticulum is a specialized organelle found in muscle cells that stores and releases calcium ions. Calcium plays a crucial role in muscle contraction as it binds to proteins in the muscle fibers, allowing them to interact and generate force. When an action potential reaches the sarcoplasmic reticulum, it releases stored calcium ions into the muscle cell, triggering muscle contraction. Therefore, the correct answer is calcium.Rate this question:
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- 40.
Which of the following is the term used to describe the opposing muscle that relaxes and stretches or eccentrically contracts to allow the actions of the agonists to occur?
- A.
Agonist
- B.
Synergist
- C.
Antagonist
- D.
Fixator
Correct Answer
C. AntagonistExplanation
The term used to describe the opposing muscle that relaxes and stretches or eccentrically contracts to allow the actions of the agonists to occur is the antagonist. The antagonist muscle works in opposition to the agonist muscle, allowing for controlled movement and preventing excessive or uncontrolled contraction of the agonist.Rate this question:
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- 41.
What is the theory that explains how filaments within the sarcomere slide past each other in order to create a change in muscle length?
- A.
Gliding filament theory
- B.
Sliding theory of contraction
- C.
Telescoping theory
- D.
Sliding filament theory
Correct Answer
D. Sliding filament theoryExplanation
The sliding filament theory is the theory that explains how filaments within the sarcomere slide past each other in order to create a change in muscle length. This theory suggests that during muscle contraction, the thin actin filaments slide over the thick myosin filaments, causing the sarcomere to shorten. This process is facilitated by the interaction between actin and myosin, where myosin heads attach to actin filaments, pull them towards the center of the sarcomere, and then detach and reattach to continue the sliding motion. The sliding filament theory is widely accepted and supported by experimental evidence.Rate this question:
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- 42.
Which of the following is the thin myofilament?
- A.
Actin
- B.
Epimysium
- C.
Myosin
- D.
Fasciculi
Correct Answer
A. ActinExplanation
Actin is the correct answer because it is a protein found in muscle cells that forms the thin filaments of the sarcomere, which is the basic unit of muscle contraction. Actin works together with myosin, which is the thick myofilament, to generate muscle contraction. Epimysium is the connective tissue that surrounds the entire muscle, fasciculi are bundles of muscle fibers, and myosin is the thick myofilament.Rate this question:
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- 43.
Which is a skeletal muscle's contractile unit?
- A.
Fasciculi
- B.
Sarcomere
- C.
Perimysium
- D.
Retinacula
Correct Answer
B. SarcomereExplanation
A sarcomere is the correct answer because it is the basic functional unit of a skeletal muscle. It is responsible for muscle contraction and is composed of actin and myosin filaments. The sarcomere shortens during muscle contraction, leading to the overall shortening of the muscle. Fasciculi refers to bundles of muscle fibers, perimysium is the connective tissue surrounding the fascicles, and retinacula are bands of connective tissue that hold tendons in place.Rate this question:
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- 44.
Which is the fascial covering of the entire muscle?
- A.
Perimysium
- B.
Epimysium
- C.
Endomysium
- D.
Aponeurosis
Correct Answer
B. EpimysiumExplanation
The fascial covering of the entire muscle is called the epimysium. This connective tissue surrounds the entire muscle and helps to protect and support it. It is the outermost layer of connective tissue that separates the muscle from surrounding tissues and organs. The epimysium also merges with the tendons at the ends of the muscle, allowing for the transmission of force from the muscle to the bones.Rate this question:
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- 45.
Which of the following is the thick myofilament?
- A.
Actin
- B.
Fasciculi
- C.
Myofascial
- D.
Myosin
Correct Answer
D. MyosinExplanation
Myosin is the correct answer because it is a thick myofilament found in muscle cells. It is responsible for the contraction of muscles by interacting with actin, a thin myofilament. The other options, such as actin, fasciculi, and myofascial, are not thick myofilaments but rather refer to other components or structures related to muscle tissues.Rate this question:
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- 46.
Which are the two ends of a sarcomere?
- A.
A-bands
- B.
Z-lines
- C.
S-lines
- D.
H-bands
Correct Answer
B. Z-linesExplanation
Z-lines are the two ends of a sarcomere. They are protein structures that anchor the thin actin filaments and define the boundary of the sarcomere. During muscle contraction, the Z-lines move closer together, causing the sarcomere to shorten and resulting in muscle contraction. Therefore, Z-lines play a crucial role in the regulation and coordination of muscle contraction.Rate this question:
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- 47.
What percentage of blood is plasma?
- A.
30%
- B.
45%
- C.
55%
- D.
70%
Correct Answer
C. 55%Explanation
Plasma is the liquid component of blood that carries various substances such as hormones, nutrients, and waste products. It makes up about 55% of the total blood volume. The other components of blood, such as red blood cells, white blood cells, and platelets, make up the remaining 45%.Rate this question:
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- 48.
Which of the following is NOT a characteristic of blood?
- A.
It is warmer than the rest of the body
- B.
Viscous fluid that is thicker and more adhesive than water
- C.
Color varies from bright scarlet to dull maroon
- D.
PH is slightly acid
Correct Answer
D. PH is slightly acidExplanation
Blood is slightly alkaline, not acidic. The pH of blood is typically around 7.4, which is slightly alkaline. This is important for maintaining the proper functioning of various biochemical processes in the body.Rate this question:
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- 49.
Which ABO blood type is called the universal recipient?
- A.
Type AB
- B.
Type O
- C.
Type A
- D.
Type B
Correct Answer
A. Type ABExplanation
Type AB blood is called the universal recipient because individuals with this blood type can receive blood transfusions from any other blood type (A, B, AB, or O) without experiencing an immune reaction. This is because type AB blood has both A and B antigens on the surface of red blood cells, making it compatible with all other blood types.Rate this question:
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- 50.
Which ABO blood type is called the universal donor?
- A.
Type AB
- B.
Type O
- C.
Type A
- D.
Type B
Correct Answer
B. Type OExplanation
Type O blood is considered the universal donor because it lacks both A and B antigens on the red blood cells. This means that it can be transfused to individuals with any blood type without causing an immune reaction. In contrast, individuals with type A blood have A antigens, type B blood have B antigens, and type AB blood have both A and B antigens, making them incompatible with certain blood types. Therefore, type O blood is the safest option for transfusions when the recipient's blood type is unknown or when there is a limited supply of compatible blood types.Rate this question:
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