Bio 201 Human Anatomy and Physiology
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Free Bio 201 Human Anatomy and Physiology Questions
sweat glands
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sudoriferous
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serous
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mucous
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sebaceous
Explanation
Correct Answer:
sudoriferous
Explanation:
Sudoriferous glands are sweat glands responsible for producing sweat, which helps regulate body temperature and excrete waste products. They are divided into eccrine glands, which secrete watery sweat for cooling, and apocrine glands, which produce thicker secretions found in areas like the armpits and groin. These glands play a key role in thermoregulation and maintaining homeostasis.
Why Other Options Are Wrong:
serous
This is incorrect because serous glands secrete a thin, watery fluid rich in enzymes, such as those found in salivary glands. They are not sweat glands.
mucous
This is incorrect because mucous glands secrete mucus, a thick protective fluid. Examples include goblet cells and glands in the respiratory and digestive tracts, not sweat glands.
sebaceous
This is incorrect because sebaceous glands secrete sebum, an oily substance that lubricates skin and hair. They are oil glands, not sweat glands.
wax glands
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ceruminous
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sudoriferous
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sebaceous
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apocrine
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serous
Explanation
Correct Answer:
ceruminous
Explanation:
Ceruminous glands are specialized modified apocrine glands located in the ear canal. They secrete cerumen (earwax), which protects the ear by trapping dust, debris, and microorganisms while also lubricating the ear canal. This waxy secretion helps maintain ear health by providing both a physical barrier and antibacterial properties.
Why Other Options Are Wrong:
sudoriferous
This is incorrect because sudoriferous glands are sweat glands that secrete sweat for thermoregulation and waste removal, not earwax.
sebaceous
This is incorrect because sebaceous glands secrete sebum, an oily substance that lubricates the skin and hair. They are not located in the ear canal for wax production.
apocrine
This is incorrect because apocrine glands are sweat glands located mainly in the armpits and groin. They produce a thicker secretion but are not the glands responsible for earwax.
serous
This is incorrect because serous glands secrete a thin, watery, enzyme-rich fluid, such as those found in salivary glands. They do not produce earwax.
means "closer to the body surface"
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superficial
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distal
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deep
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inferior
Explanation
Correct Answer:
superficial
Explanation:
Superficial is the anatomical directional term that means closer to the body surface. It is used to describe structures that are nearer to the skin or outer surface of the body. For example, the ribs are superficial to the lungs. This term is often paired with deep, which refers to structures farther away from the body surface. It helps clarify the relative depth of organs and tissues.
Why Other Options Are Wrong:
distal
This is incorrect because distal refers to a structure farther away from the point of attachment, usually on the limbs. It does not describe closeness to the surface of the body.
deep
This is incorrect because deep means farther away from the body surface. For example, the bones are deep to the muscles. It is the opposite of superficial.
inferior
This is incorrect because inferior refers to a position below or toward the bottom of the body. It describes vertical orientation, not depth relative to the body surface.
type of tissue healing that replaces the damaged tissue with the same kind of tissue
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regeneration
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fibrosis
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granulation
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inflammation
Explanation
Correct Answer:
regeneration
Explanation:
Regeneration is the type of tissue healing where damaged tissue is replaced by the same kind of tissue, restoring normal structure and function. For example, epithelial tissues and many connective tissues can regenerate effectively, resulting in little to no scar formation. This process depends on the tissue type and the extent of injury. Regeneration allows complete restoration of the original architecture and function when healing is successful.
Why Other Options Are Wrong:
fibrosis
This is incorrect because fibrosis replaces damaged tissue with dense connective tissue (scar tissue). While it restores strength, it does not restore full function like regeneration.
granulation
This is incorrect because granulation tissue is the temporary tissue that forms during wound healing, composed of new capillaries and fibroblasts. It is part of the repair process but not the final outcome of regeneration.
inflammation
This is incorrect because inflammation is the initial response to injury, characterized by redness, swelling, heat, and pain. It helps recruit immune cells and initiate healing but is not the process of tissue replacement.
Which structure is found on the internal and external surfaces of the cell membrane to serve in recognition, reception, adhesion?
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peripheral proteins
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integral proteins
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phospholipids
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cholesterol
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DNA
Explanation
Correct Answer:
peripheral proteins
Explanation:
Peripheral proteins are located on the internal and external surfaces of the plasma membrane. They play key roles in cell recognition, signaling, and adhesion by interacting with other cells or the extracellular matrix. They are not embedded deeply in the bilayer but are loosely attached, making them versatile for receptor and recognition functions.
Why Other Options Are Wrong:
integral proteins
This is incorrect because integral proteins span the membrane and are mainly involved in transport (channels and carriers) or structural anchoring, not specifically recognition and adhesion on the surface.
phospholipids
This is incorrect because phospholipids form the bilayer itself, providing a structural barrier. They are not responsible for recognition or adhesion.
cholesterol
This is incorrect because cholesterol helps regulate membrane fluidity and stability, but it is not involved in recognition or adhesion.
DNA
This is incorrect because DNA is found in the nucleus (or nucleoid in prokaryotes). It contains genetic information but has no role on the cell membrane surface.
several layers of cells whose shape changes with the amount of stretching
transitional
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transitional
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pseudostratified
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areolar
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stratified squamous
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simple squamous
Explanation
Correct Answer:
transitional
Explanation:
Transitional epithelium is made of several layers of cells that can change shape depending on the degree of stretching. This tissue is specialized for areas that need to expand and contract, such as the urinary bladder, ureters, and part of the urethra. When relaxed, the cells appear cuboidal, but when stretched, they flatten out, allowing these organs to hold variable volumes of fluid without tearing.
Why Other Options Are Wrong:
pseudostratified
This is incorrect because pseudostratified epithelium appears to have multiple layers due to varied cell heights, but it actually has only one layer. It does not change shape with stretching and is commonly found lining the respiratory tract.
areolar
This is incorrect because areolar tissue is a type of loose connective tissue, not epithelial tissue. It provides support, elasticity, and cushioning but does not form layers of cells that change shape.
stratified squamous
This is incorrect because stratified squamous epithelium has multiple layers of flat cells. It provides protection in areas subject to friction, such as the skin and esophagus, but it does not stretch and change shape like transitional epithelium.
simple squamous
This is incorrect because simple squamous epithelium is a single layer of flat cells. It is specialized for diffusion and filtration, not for stretching.
A cut on a diagonal or at an angle is
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oblique
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sagittal
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horizontal
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coronal
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coronal and horizontal
Explanation
Correct Answer:
oblique
Explanation:
An oblique cut is made at a diagonal or angled plane that is not purely sagittal, coronal, or horizontal. It allows examination of structures from a slanted perspective, often providing a better view of anatomical relationships that cannot be seen clearly in standard planes. In medical imaging, oblique cuts are frequently used to highlight complex structures in the body.
Why Other Options Are Wrong:
sagittal
This is incorrect because a sagittal cut divides the body into right and left portions. It runs vertically, not diagonally, so it is not considered an oblique cut.
horizontal
This is incorrect because a horizontal (or transverse) cut divides the body into superior (top) and inferior (bottom) portions. It runs straight across, not at an angle.
coronal
This is incorrect because a coronal (or frontal) cut divides the body into anterior (front) and posterior (back) portions. It is vertical but not diagonal.
coronal and horizontal
This is incorrect because combining coronal and horizontal still produces straight cuts in defined planes. An oblique cut, by contrast, is specifically angled and does not align with either of these planes.
membrane processes that require energy
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active transport
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passive transport
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osmosis
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facilitated diffusion
Explanation
Correct Answer:
active transport
Explanation:
Active transport requires energy (usually ATP) to move molecules across the membrane against their concentration gradient, from low concentration to high concentration. This process is critical for maintaining gradients such as sodium-potassium balance in cells. Because molecules move against their natural direction of flow, energy input is essential.
Why Other Options Are Wrong:
passive transport
This is incorrect because passive transport does not require energy. It relies on concentration gradients to move molecules, such as in diffusion and osmosis.
osmosis
This is incorrect because osmosis is the diffusion of water through a selectively permeable membrane, which occurs without energy.
facilitated diffusion
This is incorrect because facilitated diffusion uses carrier proteins or channels but still does not require energy, as molecules move down their concentration gradient.
- nucleolus
- chromatin
- mitochondria
- Golgi apparatus
- lysosomes
Explanation
type of burn that destroys the epidermis and part of the dermis resulting in blisters
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second degree
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first degree
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third degree
Explanation
Correct Answer:
second degree
Explanation:
A second-degree burn (also called a partial-thickness burn) damages both the epidermis and part of the dermis. This type of burn is characterized by redness, pain, swelling, and blister formation due to fluid accumulation between skin layers. Healing can take several weeks, and scarring may occur depending on the severity. Second-degree burns are more serious than first-degree burns but less severe than third-degree burns.
Why Other Options Are Wrong:
first degree
This is incorrect because a first-degree burn affects only the epidermis. It causes redness and pain, similar to a mild sunburn, but does not produce blisters.third degree
This is incorrect because a third-degree burn destroys the full thickness of the skin, including the epidermis, dermis, and possibly underlying tissues. It causes severe damage, often appears white or charred, and typically requires medical intervention such as skin grafting.
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