Anatomy and Physiology

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Questions and Answers

A patient cannot distinguish various types of odors. Damage to which of the following is most likely?

  • Facial nerve (VIII)
  • Hypoglossal nerve (XII)
  • Olfactory nerve (I) (correct)
  • Vagus nerve (X)

A patient has lost the ability to taste food. Which cranial nerve is most likely damaged?

  • Abducens nerves
  • Optic nerves
  • Facial nerves (correct)
  • Trigeminal nerves

Over 90% of all parasympathetic fibers are derived from which cranial nerve?

  • X (Vagus) (correct)
  • XII (Hypoglossal)
  • V (Trigeminal)
  • VII (Facial)

Which division of the autonomic nervous system is responsible for the 'fight or flight' response?

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

Control of temperature, endocrine activity, and thirst are functions associated with which brain structure?

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

Which of these effectors is NOT directly controlled by the autonomic nervous system?

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

The dorsal body cavity is the site of which of the following?

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

Which of the following statements is most accurate regarding the relationship between organ systems?

<p>The immune system is closely associated with the lymphatic system. (B)</p> Signup and view all the answers

Excitability or responsiveness, a functional characteristic of life, refers to:

<p>Sensing environmental changes and reacting or responding to them (B)</p> Signup and view all the answers

Carbohydrates are stored in the liver and skeletal muscles in what form?

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

Which of the following does NOT accurately describe enzymes?

<p>Enzymes work by raising the energy of activation. (B)</p> Signup and view all the answers

Which of the following accurately describes mitochondria?

<p>Contain some of the DNA and RNA code necessary for their own function (C)</p> Signup and view all the answers

Which of the following is a primary function of peroxisomes?

<p>Are able to detoxify substances by enzymatic action (A)</p> Signup and view all the answers

Which of the following is NOT a typical function of lysosomes?

<p>Help in the formation of cell membranes (C)</p> Signup and view all the answers

In which stage of mitosis do the identical sets of chromosomes line up along the midline or equator of the cell?

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

Which of the following is a key principle of the fluid mosaic model of cell membrane structure?

<p>Phospholipids form a bilayer that is largely impermeable to water-soluble molecules. (B)</p> Signup and view all the answers

Which layer of tissue is damaged in a first-degree burn?

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

Why are eyebrow hairs always shorter than hairs on your head?

<p>Eyebrow follicles are only active for a few months (D)</p> Signup and view all the answers

Cells of the stratum spinosum have many interlocking desmosomes that will remain between the cells as they migrate to the stratum corneum. These cell junctions serve the body by doing what?

<p>Preventing mechanical stress or trauma from damaging the epidermis (D)</p> Signup and view all the answers

Which of the following examples illustrates homeostasis maintained by a negative feedback mechanism?

<p>Thickening of epidermis to form a callus in places where the skin is exposed to friction. (C)</p> Signup and view all the answers

Which of the following is an example of homeostasis maintained by a negative feedback loop?

<p>Release of chemical signals by keratinocytes that have been damaged by UV light that will increase the production of melanin. (B)</p> Signup and view all the answers

Ossification (Osteogenesis) refers to which process?

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

Lengthwise growth of long bones during infancy and youth is primarily achieved through what mechanism?

<p>Interstitial growth of the epiphyseal plates (D)</p> Signup and view all the answers

Growth of bones relies on a symphony of hormones. Which hormone is most important for bone growth during infancy and childhood?

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

In some cases, the epiphyseal plate of the long bones of children closes too early, causing stunted growth. What might be the cause?

<p>Elevated levels of sex hormones (C)</p> Signup and view all the answers

How do thoracic vertebrae differ from other vertebrae?

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

What is the major function of the axial skeleton?

<p>Provide central support for the body and protect internal organs (C)</p> Signup and view all the answers

Which bone forms the anterior cranium?

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

Which abnormal spinal curvature is often seen in pregnant women as they attempt to preserve their center of gravity toward the end of the pregnancy?

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

How do thoracic vertebrae 11 and 12 differ from the other vertebrae?

<p>The transverse processes do not have facets that articulate with the tubercles of the ribs. (C)</p> Signup and view all the answers

The superior nasal concha is a part of which bone?

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

Which part of the ethmoid bone forms the superior portion of the nasal septum?

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

Which of the following is NOT a movement that can occur between vertebrae?

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

Articulations permitting only slight degrees of movement are classified as which of the following?

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

Which of the following are cartilaginous joints?

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

Bowing to one's opponent before a jiu jitsu match is what kind of movement?

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

What is a potential benefit of recruiting slow oxidative muscle fibers for contraction before recruiting fast oxidative and fast glycolytic fibers?

<p>This will help to allow for fine control with delicate contractile force with a small stimulus (B)</p> Signup and view all the answers

Addition of more mitochondria to a muscle fiber will have the greatest enhancing effect on which type of fiber?

<p>Slow oxidative fibers (B)</p> Signup and view all the answers

If given the exact same amount of ATP, which of the three fiber types would be able to contract for the longest amount of time?

<p>They would all contract for the same amount of time (B)</p> Signup and view all the answers

Flashcards

Olfactory nerve

The nerve responsible for the sense of smell.

Facial nerve

The nerve that controls the ability to taste food.

Vagus Nerve

Cranial nerve from which over 90% of all parasympathetic fibers are derived.

Sympathetic division

Division of the autonomic nervous system responsible for 'fight or flight' responses.

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Hypothalamus

Brain region that controls temperature, endocrine activity, and thirst.

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Skeletal muscle

Effector not directly controlled by the autonomic nervous system.

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Brain

The dorsal body cavity houses what organ?

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Lymphatic System

The immune system is closely associated with this system.

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Excitability (Responsiveness)

Sensing changes in the environment and reacting or responding to them.

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Glycogen

Form in which carbohydrates are stored in the liver and skeletal muscles.

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Enzyme function

Enzymes lower the energy of activation

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Mitochondria

Organelle containing some of the DNA and RNA code necessary for their own function.

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Peroxisomes

Organelle able to detoxify substances by enzymatic action.

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Cell Membranes

Lysosomes do not make which structure?

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Metaphase

Mitosis stage where chromosomes align at the midline.

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Fluid mosaic model

Principle pertaining to phospholipids forming a bilayer.

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Epidermis

Layer of tissue damaged in a first-degree burn.

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Follicle Activity Length

Why are eyebrow hairs shorter?

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Prevent mechanical trauma

How do cells of the stratum spinosum serve the body?

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Negative feedback

Illustrated by thickening of epidermis to form a callus.

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Negative Feedback

Increased melanin production is an example of what feedback loop?

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Ossification

The process of bone formation.

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Interstitial growth

How long bones grow in length during infancy.

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Growth Hormone

Hormone of greatest importance for bone growth during infancy and childhood.

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Elevated sex hormones

Inhibits bone growth during childhood.

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Costal facets

Thoracic vertebrae have these to articulate with ribs.

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Protect internal organs

The major function of the axial skeleton.

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Maxilla

This bone forms the anterior cranium.

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Lordosis

Abnormal curve often seen in pregnant women.

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Transverse process facets

Thoracic vertebrae 11 and 12 lack these facets.

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Ethmoid

The superior nasal concha a part of which bone

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Perpendicular plate

Part of ethmoid bone forms superior part of the nasal septum.

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Supination

Movement that can't occur between vertebrae.

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Amphiarthroses

Articulations permitting only slight movement.

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Synchondrosis

Type of cartilaginous joints.

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Flexion

A type of movement.

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Help allow for fine control

Recruiting slow oxidative fibers may allow what?

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Slow oxidative fibers

Addition of more mitochondria would have the greatest effect on:

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Study Notes

  • A patient unable to distinguish odors may have damage to the olfactory nerve (I).
  • Damage to the facial nerves can cause a loss of the ability to taste food.
  • Over 90% of parasympathetic fibers originate from cranial nerve X (vagus).
  • The "fight or flight" response is associated with the sympathetic division of the autonomic nervous system.
  • The hypothalamus is responsible for controlling temperature, endocrine activity, and thirst.
  • Skeletal muscle is NOT directly controlled by the autonomic nervous system.
  • The brain is located in the dorsal body cavity.
  • The immune system is closely associated with the lymphatic system.
  • Excitability or responsiveness refers to sensing changes in the environment and then reacting or responding to them.
  • Carbohydrates are stored in the liver and skeletal muscles as glycogen.
  • Enzymes do NOT work by raising the energy of activation; they lower it.
  • Mitochondria contain some of the DNA and RNA code necessary for their own function.
  • Peroxisomes are able to detoxify substances by enzymatic action.
  • Helping in the formation of cell membranes is NOT a function of lysosomes.
  • During metaphase of mitosis, identical sets of chromosomes line up along the midline or equator of the cell.
  • Phospholipids form a bilayer that is largely impermeable to water-soluble molecules and this is a principle of the fluid mosaic model of cell membrane structure.
  • A first-degree burn damages the epidermis layer of tissue.
  • Eyebrow follicles are only active for a few months, which is why eyebrow hairs are always shorter than hairs on the head.
  • Interlocking desmosomes among cells of the stratum spinosum prevent mechanical stress or trauma from damaging the epidermis.
  • Homeostasis through negative feedback is illustrated by the release of chemical signals by UV light-damaged keratinocytes to increase melanin production.
  • Ossification (Osteogenesis) is the process of bone formation.
  • Lengthwise, long bone growth during infancy and youth occurs through interstitial growth of the epiphyseal plates.
  • Growth hormone is most important for bone growth during infancy and childhood.
  • Elevated levels of sex hormones can cause the epiphyseal plate of long bones to close too early in children.
  • Thoracic vertebrae have costal facets that differentiate them from other vertebrae.
  • The axial skeleton provides central support for the body and protects internal organs.
  • The maxilla forms the anterior cranium.
  • Lordosis is an abnormal curve frequently observed in pregnant women.
  • Thoracic vertebrae 11 and 12 do not have facets on their transverse processes that articulate with the tubercles of the ribs.
  • The ethmoid bone includes the superior nasal concha.
  • The perpendicular plate of the ethmoid bone forms the superior part of the nasal septum.
  • Supination is NOT a movement that can occur between vertebrae.
  • Amphiarthroses are articulations that permit only slight degrees of movement.
  • Synchondrosis is a cartilaginous joint.
  • Bowing to an opponent is considered a flexion movement.
  • Recruiting slow oxidative fibers for contraction may help for fine control with delicate contractile force with a small stimulus.
  • Adding more mitochondria impacts slow oxidative fibers the most.
  • Slow oxidative fibers can contract for the longest amount of time when given the same amount of ATP.

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