Anatomy and Physiology False Statements

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Questions and Answers

Considering anatomical position, what is the relationship of the elbow to the shoulder?

  • Inferior
  • Proximal
  • Lateral
  • Distal (correct)

What distinguishes isotopes of the same element from one another?

  • Number of protons
  • Atomic number
  • Number of electrons
  • Number of neutrons (correct)

Which type of bone is primarily constructed of thin plates of spongy bone covered by a layer of compact bone?

  • Flat bones (correct)
  • Short bones
  • Irregular bones
  • Long bones

How does the temporal bone articulate with the zygomatic bone?

<p>Via the zygomatic process of the temporal bone. (B)</p> Signup and view all the answers

Which movements are commonly associated with the wrist joint?

<p>Abduction, adduction, flexion, and extension (B)</p> Signup and view all the answers

What happens to the muscle fibers within a muscle after a motor neuron fires?

<p>All muscle fibers in the muscle contract. (C)</p> Signup and view all the answers

Where do the muscles of facial expression typically insert?

<p>Into the skin or other muscles. (B)</p> Signup and view all the answers

What effect do strong stimuli have on action potentials?

<p>They increase the frequency of action potentials. (B)</p> Signup and view all the answers

Which structures are the three primary regions of the cerebrum?

<p>Cerebral cortical gray matter, internal white matter, and basal nuclei. (B)</p> Signup and view all the answers

What is a key difference between somatic and visceral reflex arcs?

<p>Visceral reflexes involve glands, smooth muscle, or cardiac muscle, whereas somatic reflexes involve skeletal muscles. (B)</p> Signup and view all the answers

Which molecules are the main components of the glycocalyx?

<p>Glycolipids, glycoproteins, and cholesterol. (A)</p> Signup and view all the answers

How do merocrine glands secrete their products?

<p>By exocytosis as the secretions are produced. (C)</p> Signup and view all the answers

If someone has a burn that is quite painful after touching a hot pot, what degree burn would it likely be classified as?

<p>Second-degree burn (A)</p> Signup and view all the answers

How would muscles that help maintain posture best be described?

<p>Synergists (D)</p> Signup and view all the answers

What is the influence of parasympathetic and sympathetic fibers on the heart when they both innervate the same cardiac cells?

<p>Antagonistic (A)</p> Signup and view all the answers

What area of study does embryology concern?

<p>The study of the structural changes from conception through old age. (C)</p> Signup and view all the answers

What chemical process is involved in breaking a dipeptide into two amino acids?

<p>Hydrolysis (A)</p> Signup and view all the answers

Which enzyme is essential for DNA replication, and what type of molecule results from this process?

<p>DNA polymerase; a semi-conserved molecule of DNA (D)</p> Signup and view all the answers

What does it typically mean when a patient is described as having 'third-degree burns'?

<p>The patient has burns that involve the entire thickness of the skin. (B)</p> Signup and view all the answers

Which hormone is primarily involved in the control of bone remodeling?

<p>Parathyroid hormone (A)</p> Signup and view all the answers

What effect does the shallow socket of the shoulder joint have on its stability?

<p>It allows for a wide range of motion at the expense of stability. (D)</p> Signup and view all the answers

What does the 'all-or-none' phenomenon state regarding nerve conduction?

<p>If a stimulus is strong enough, the action potential is always the same size. (C)</p> Signup and view all the answers

What type of nerves are all splanchnic nerves?

<p>Sympathetic (A)</p> Signup and view all the answers

How does osmosis compare to the diffusion of other small particles in terms of the laws of physics?

<p>It follows identical laws of physics. (A)</p> Signup and view all the answers

What type of cell activity is typically observed in the stratum corneum?

<p>No cell activity (cells are dead and anucleate). (D)</p> Signup and view all the answers

Which protein primarily composes microfilaments?

<p>Actin (A)</p> Signup and view all the answers

Why does the nail bed appear pink?

<p>Due to the rich network of blood vessels in the underlying dermis. (D)</p> Signup and view all the answers

What characterizes the periosteum, besides its protective function?

<p>It is richly supplied with nerve fibers and blood vessels. (C)</p> Signup and view all the answers

Where are mastoid sinuses located, and what is their typical condition?

<p>In the mastoid process of the temporal bone, usually free from infections. (C)</p> Signup and view all the answers

Besides beta-adrenergic receptors, what other types of receptors are found on the heart?

<p>Muscarinic cholinergic receptors. (C)</p> Signup and view all the answers

How does thick skin differ from thin skin in terms of the dermal layer?

<p>Thick skin has a more extensive dermal layer than thin skin. (A)</p> Signup and view all the answers

Which region of the vertebral column does lordosis affect?

<p>Lumbar vertebrae (A)</p> Signup and view all the answers

What structural characteristics are common to all vertebrae?

<p>A body, a transverse process, and a spinous process. (D)</p> Signup and view all the answers

What does reciprocal inhibition refer to in muscle physiology?

<p>The contraction of agonist muscles while antagonists relax. (D)</p> Signup and view all the answers

How do the autonomic and somatic nervous systems relate in terms of independence and functionality?

<p>They work together closely and share regulatory functions. (A)</p> Signup and view all the answers

What primarily distinguishes dense irregular connective tissue from dense regular connective tissue?

<p>The arrangement of collagen fibers. (D)</p> Signup and view all the answers

Which type of bone contains medullary cavities to reduce their weight?

<p>Long bones (A)</p> Signup and view all the answers

What is another common name for endocrine glands?

<p>Ductless glands (B)</p> Signup and view all the answers

Which bone is considered the largest and strongest in the face?

<p>Mandible (C)</p> Signup and view all the answers

What type of joint is a symphysis, and what is it designed for?

<p>Amphiarthrotic joints designed for strength with flexibility. (B)</p> Signup and view all the answers

When a muscle fiber contracts, what changes occur in the banding pattern of the sarcomere?

<p>The I bands diminish, the H zones disappear, and the A bands do not change. (B)</p> Signup and view all the answers

How does pronation compare to supination in terms of movement strength?

<p>Supination is a much stronger movement than pronation. (C)</p> Signup and view all the answers

What is the reticular activating system (RAS) primarily comprised of?

<p>Specific pathways primarily in the brainstem. (B)</p> Signup and view all the answers

Flashcards

Elbow Position Relative to Shoulder

Elbow is distal to the shoulder, not proximal.

Isotope Differences

Isotopes differ in neutron number, not electrons.

Composition of Some Bones

These bones consist of spongy bone covered by compact bone.

Temporal Bone Connection

The temporal bone connects to the zygomatic bone via the zygomatic process of the temporal bone

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Wrist Joint Movements

The wrist joint can exhibit adduction and abduction movements

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Motor Neuron Firing

Once a motor neuron has fired, all the muscle fibers in a motor unit contract.

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Facial Muscle Insertion

Facial muscles insert into skin or other muscles, not bones.

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Action Potential

Strong stimuli cause the frequency of action potentials generated to increase, while the amplitude stays the same.

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Cerebrum Regions

The three basic regions of the cerebrum are the cerebral cortical gray matter, internal white matter, and the basal nuclei.

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Visceral Reflex Arcs

Visceral reflex arcs do have afferent fibers (visceral sensory neurons).

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Glycocalyx Composition

Glycocalyx includes glycolipids, glycoproteins, and may include other molecules, but it is displayed on the outside surface of the plasma membrane.

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Merocrine Secretion

Merocrine glands secrete through exocytosis; holocrine glands rupture.

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Third-Degree Burns

Third-degree burns involve full-thickness damage with less pain due to nerve damage.

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Muscles and Posture

Muscles that help to maintain posture are best described as fixators.

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Heart Innervation

influence of the two divisions on the heart is antagonistic.

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Embryology Focus

Embryology concerns structural changes from conception to birth.

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Dipeptide Breakdown

A dipeptide can be broken into two amino acids by hydrolysis.

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DNA replication

DNA replication requires an enzyme called DNA polymerase and results in a semiconserved molecule of DNA.

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Third-Degree Burns

Third-degree burns involve full-thickness damage; the area affected is not the determining factor

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Bone Remodeling Hormone

The hormone that is primarily involved in the control of bone remodeling is parathyroid hormone

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Shoulder Joint

The shallow socket of the shoulder joint does not restricts dislocation.

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All-or-none phenomenon

The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must reach threshold for conduction to take place.

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Splanchnich Nerves

Some splanchnic nerves are parasympathetic.

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Osmosis

Osmosis is the passive movement of water, and it follows almost completely the laws of physics when compared to the diffusion of ions or other small particles.

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Stratum Basale

Cells in the stratum basale undergo mitosis to keep the layer thick and protective.

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Microfilaments

Microfilaments are thin strands of the contractile protein composed of actin.

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Appearance of Neil Beds

The reason that the nail bed appears pink is the presence of a large number of capillaries in the underlying dermis.

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Periosteum

The periosteum is a tissue that serves to supply the bone with nerves or blood vessels.

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Mastoid Sinuses

The mastoid sinuses are not usually free infections

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Heart Receptors

ẞ-adrenergic receptors and α-adrenergic receptors are both found on the heart.

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Thick and thin skin

Thick skin has a more less extensive dermal layer than thin skin.

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Lordosis

Lordosis affects the lumbar vertebrae.

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Vertebrae

All vertebrae possess a body, a spine, and transverse processes.

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Reciprocal Inhibition

Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron for antagonistic muscles in the same area is inhibited and cannot respond.

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Nervous system

The autonomic and somatic nervous systems functional overlap.

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Connective tissue

The basic difference between dense irregular and dense regular connective tissues is in thearrangement of the collagen fibers.

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medullary cavities

Short, irregular, and flat bones do not have medullary cavities in order to keep the weight of the bones light.

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Endocrine Glands

Endocrine glands are often called ductless glands.

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Largest Face Bone

The largest and strongest bone of the face is the mandible.

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Study Notes

  • The elbow is not proximal to the shoulder.
  • Isotopes do not differ from each other only in the number of electrons the atom contains.
  • Short, irregular, and flat bones consist of thin plates of spongy bone covered by compact bone.
  • The temporal bone does not connect to the zygomatic bone via the temporal process of the temporal bone.
  • The wrist joint cannot exhibit adduction and eversion movements.
  • Once a motor neuron has fired, all the muscle fibers in a muscle do contract.
  • The muscles of facial expression insert into skin or other muscles, not bones.
  • Strong stimuli do not cause the amplitude of action potentials generated to increase.
  • The three basic regions of the cerebrum are the cerebral cortical gray matter, internal white matter, and the superior and inferior colliculi.
  • Somatic and visceral reflex arcs are similar, but visceral reflex arcs lack afferent fibers (visceral sensory neurons).
  • The glycocalyx is composed of glycolipids, glycoproteins, and cholesterol molecules that are displayed on the outside surface of the plasma membrane.
  • Merocrine glands do not produce their secretions by accumulating their secretions internally until the cell ruptures.
  • A burn from a hot pot described as painful is not a third-degree burn.
  • Muscles that help to maintain posture are synergists.
  • In the heart, the influence of parasympathetic and sympathetic fibers is not synergistic.
  • Embryology concerns the structural changes that occur in an individual from conception through old age.
  • A dipeptide is not broken into two amino acids by dehydration synthesis.
  • DNA replication requires an enzyme called RNA polymerase and the result is not a semi-new semi-conserved molecule of DNA.
  • Third-degree burns do not cover approximately one-third or more of the body.
  • The hormone that is primarily involved in the control of bone remodeling is calcitonin.
  • The shallow socket of the shoulder joint does not restrict dislocation of the humerus and is not the main contributor to the stability of the joint.
  • The all-or-none phenomenon as applied to nerve conduction does not mean that the whole nerve cell must be stimulated for conduction to take place.
  • All splanchnic nerves are not sympathetic.
  • Osmosis is the passive movement of water, but it does not follow almost completely opposite laws of physics.
  • Cells in the stratum corneum do not undergo mitosis to keep the layer thick and protective.
  • Microfilaments are not thin strands of the contractile protein composed of myosin.
  • The nail bed appears pink not because of melanocytes in the underlying dermis.
  • The periosteum protects the bone as it is supplied with nerves and blood vessels.
  • The mastoid sinuses located in the skull are not usually free from infections.
  • β-adrenergic receptors are not the only receptors found on the heart.
  • Thick skin has a more extensive dermal layer than thin skin.
  • Lordosis affects the thoracic vertebrae.
  • Not all vertebrae possess a body, a spine, and transverse foramina.
  • Reciprocal inhibition affects the synergistic muscles, located in the same area.
  • The autonomic and somatic nervous systems are two separate systems that work totally independently of each other and do not lack any functional overlap.
  • The difference between dense irregular and dense regular connective tissues is not the amount of elastic fibers and adipose cells present.
  • Short, irregular, and flat bones have medullary cavities to keep the weight of the bones light.
  • Endocrine glands are not often called ducted glands.
  • The largest and strongest bone of the face is not the maxilla.
  • Symphyses are not synarthrotic joints designed for strength with flexibility.
  • When a muscle fibre contracts the A bands do not diminish in length.
  • Pronation is not a stronger movement than supination.
  • The reticular activating system (RAS) consists of specific pathways primarily in the limbic system.

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