BIOL 112 Lecture Notes - Lecture 3: Proprioception, Esophagus, Parapodium

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Annelida: bilateral protostomes, segmentation , complete, regionally specialized gut, metanephridia, closed circulatory system, _________________ head . 8: nervous system centralized & ventral, all habitats; ~ 16,000 spp. * general body forms: polychaetes: (example: nereis) mouth anus, polychaetes parapodia: Annelida: oligochaetes (example: lumbricus) mouth, hirudinida, no parapodia, no chaetae, strong heteronomy mouth anus anus. * circulation & gas exchange: closed, dorsoventral vessels hearts . Annelida: polychaetes & oligochaetes: epidermis gut (intestine) Sagittal section: leeches, functionally acoelomate flattened epidermis gut. * nervous system: ladder-like single or double ventral nerve cord, circumenteric nerve ring, sensory receptors, tactile, chemoreceptors, photoreceptors, georeceptors, phonoreceptors, proprioceptors, thermoreceptors. * support & locomotion: hydrostatic skeleton, metachronal waves lateral undulation, peristaltic burrowing, inch worm . Asexual: regeneration in some, bud-like outgrowths, isolated fragments new individuals. Sexual: polychaetes, mostly dioecious, gametes from peritoneum, oligochaetes & leeches, hermaphrodites, complex & permanent reproductive systems, gamete formation: * ontogeny: zygote, spiral cleavage, stereoblastula mouth anus mouth mouth anus anus.

Related Questions

The Cambrian explosion is a prime example of ________________.

		mass extinction
		evolutionary stasis
		a large meteor impact
		adaptive radiation

1 points

QUESTION 2

Most animals are viviparous.

True

False

1 points

QUESTION 3

The first phylum with ganglia in their nervous system are the ________________________.

		Mollusca
		Nematoda
		Bivalvia
		Platyhelminthes

1 points

QUESTION 4

The last common ancestor of all animals was probably a _____________________.

		a unicellular worm
		multicellular algae
		flagellated protist
		multicellular fungus

1 points

QUESTION 5

You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile by use of many short extensions of the cytoplasm. It has well-developed organelles and two nuclei, one large, one small. The organism is most likely to be a ______________.

		foraminifera
		radiolarian
		ciliate
		flagellate

1 points

QUESTION 6

Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length.

		A mollusc
		A nematode
		A platyhelminth
		Not enough information to determine.

1 points

QUESTION 7

If the animal is a hermaphrodite, it is said to be _______________.

		dioecious
		eutelic
		monoecious
		trioecious

1 points

QUESTION 8

A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange and segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature ____________.

		eight legs
		two pairs of antennae
		a sessile lifecycle
		an open circulatory system

1 points

QUESTION 9

The Phylum Echinodermata exhibits metamerism.

True

False

1 points

QUESTION 10

The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that _____.

		a larger volume-to-surface area ratio is adaptive in many mammals
		evolution generally progresses toward some goal
		evolution tends toward increased complexity or increased size
		in particular environments, similar adaptations can be beneficial to more than one species

1 points

QUESTION 11

Suppose you are a researcher fro a pest-control company and you develop a chemical that inhibits the develpment of an embryonic mosquito's endodermal cells. Which of the following would cause the pesticide to work?

		The mosquito would develop a weak exoskeleton, making it easy prey.
		The mosquito's gut would not function properly and it would starve.
		The mosquito would not have a properly functioning muscular system.
		Nothing would happen and your experiment would be a failure.

1 points

QUESTION 12

Holometabolis refers to complete metamorphosis.

True

False

1 points

QUESTION 13

Which of these conditions are always true of populations evolving due to natural selection?
Condition 1: The population must vary in traits that are heritable.
Condition 2: Some heritable traits must increase reproductive success.
Condition 3: Individuals pass on most traits that they acquire during their lifetime.

		Condition 1 only
		Condition 2 only
		Conditions 1 and 2
		Conditions 2 and 3

1 points

QUESTION 14

Scientific theories _____. 22.3

		are nearly the same things as hypotheses
		are supported by, and make sense of, many observations
		cannot be tested because the described events occurred only once
		are predictions of future events

1 points

QUESTION 15

The evolution of animal species and their diversity is a result of the evolution of new and different ways to _______________.

		reproduce
		arrange their cells into tissues
		become symmetrical
		form an embyro and establish a basic body plan

Select 30 medical terms from the articles.

Complete the table in this document, like the Summary Tables in your textbook.

In the first column list the medical term.

In the second column, list any prefixes and define them.

In the third column, list the root and define it.

In the fourth column, list any suffixes and define them.

In the fifth column list the exact definition of the term.

NOTE: You many not use any medical terms that appear in any of the summary tables in your textbook.

Make sure to include references to the articles your terms come from.

1: Facelift Anatomy

With age, characteristic changes occur in the central third of the face. ^[¹^] A youthful midface is characterized by prominent cheeks and a smooth transition between the lower eyelid and cheek. Structural, soft tissue, and skin changes develop as wrinkles and creases, progressive ptosis, and general atrophy of the structures.

Pessa confirmed the changes seen in the bony structures of the face, and these include a downward migration of cephalometric points. ^[²^] The downward migration manifests as a change in soft tissue volume. The effects of gravity and repeated animation of the face also directly affect the soft tissue that overlies the mimetic musculature.

The results of magnetic resonance imaging (MRI) evaluations have helped to determine that the mimetic muscles themselves remain intact; however, the attachment to the overlying soft tissue and skin changes. The repeated action of smiling results in deepening of the nasolabial fold at the point at which the superficial musculoaponeurotic system (SMAS) inserts into the dermis.

2: Pancreas Anatomy

Embryology

The pancreas develops as 2 buds (outpouchings) of endoderm from the primitive duodenum at the junction of the foregut and the midgut. A small ventral bud (pouch) forms the lower (inferior) part of the head and the uncinate process of pancreas, whereas a large dorsal bud (pouch) forms the upper (0) part of the head as well as the body and tail of the pancreas. The ventral bud rotates behind the duodenum dorsally from right to left and fuses with the dorsal bud, and the duct of the distal part (body and tail) of the dorsal bud unites with the duct of the ventral bud to form the main pancreatic duct (of Wirsung). Because the common bile duct (CBD) also arises from the ventral bud, it forms a common channel with the main pancreatic duct. The remaining proximal part (head) of the duct of the dorsal bud remains as the accessory pancreatic duct (of Santorini).

3: Conduction System of the Heart

The conducting system of the heart consists of cardiac muscle cells and conducting fibers (not nervous tissue) that are specialized for initiating impulses and conducting them rapidly through the heart (see the image below). They initiate the normal cardiac cycle and coordinate the contractions of cardiac chambers. Both atria contract together, as do the ventricles, but atrial contraction occurs first.

The conducting system provides the heart its automatic rhythmic beat. For the heart to pump efficiently and the systemic and pulmonary circulations to operate in synchrony, the events in the cardiac cycle must be coordinated.

4:Spleen Anatomy

Overview

The spleen is an organ shaped like a shoe that lies relative to the 9th and 11th ribs and is located in the left hypochondrium and partly in the epigastrium. Thus, the spleen is situated between the fundus of the stomach and the diaphragm. The spleen is very vascular and reddish purple in color; its size and weight vary. A healthy spleen is not palpable.

Development

The spleen develops in the cephalic part of dorsal mesogastrium (from its left layer; during the sixth week of intrauterine life) into a number of nodules that fuse and form a lobulated spleen. Notching of the superior border of the adult spleen is evidence of its multiple origin (see the image below)

5:Lung Anatomy

Development

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QUESTION 1

The âCambrian Explosionâ describes the relatively sudden appearance of __________ in the fossil record in the Cambrian.

		Metazoans
		Eukaryotes
		Algae
		Cephalopods
		Chocolate

0.5 points

QUESTION 2

Poriferans lack:

		Extracellular matrix
		Organs
		Choanocytes
		Nuclei

0.5 points

QUESTION 3

Which of the following has no terrestrial species?

		Brachiopoda
		Nematoda
		Mollusca
		Arthropoda

0.5 points

QUESTION 4

The metazoan phylum with the greatest diversity (i.e., number of species) today is:

		Arthropoda.
		Annelida.
		Cnidaria.
		Mollusca.

0.5 points

QUESTION 5

Segmentation is a feature of:

		Cnidarians
		Platyhelminthes
		Nematodes
		Annelids

0.5 points

QUESTION 6

A coelom is:

		Fun for the whole family.
		A fluid-filled body cavity forming within the mesoderm.
		A stinging cell found in cnidarians.
		A characteristic of flatworms.
		A fluid-filled body cavity between the mesoderm and endoderm.

0.5 points

QUESTION 7

How old is the earliest fossil evidence of life?

		3.8 Ma
		3.8 Ga
		1.8 Ga
		543 Ma

0.5 points

QUESTION 8

Which of the following is found only in bilaterians?

		Mesoderm
		Choanocytes
		Radial symmetry
		Gastrulation
		Nougat

0.5 points

QUESTION 9

Which of the following is not an explanation put forward for the Cambrian Explosion?

		Oxygen increase
		Revolution in substrate use
		Predation
		Global warming

0.5 points

QUESTION 10

Cnidarians are distinct from other animals in having:

		A can-do attitude
		Nematocysts
		Chitin
		Collagen
		Bilateral symmetry

0.5 points

QUESTION 11

Which of the following is a group within Platyhelminthes?

		Insecta
		Velveeta
		Bivalvia
		Cestoda
		Hydrozoa

0.5 points

QUESTION 12

Of Fungi, Metazoa, and Plantae, which two are thought to be more closely related to each other than they are to the third?

		Metazoa and Plantae
		Fungi and Plantae
		Fungi and Metazoa

0.5 points

QUESTION 13

The Cryogenian is a period of the Proterozoic characterized by:

		Low self esteem
		Earliest fossils of life
		Cooling and glaciation
		Sudden appearance of fossils with hard parts
		Increase in oxygen

0.5 points

QUESTION 14

Which of the following is thought not to have been abundant in the environment of the early Earth when life originated?

		Oxygen
		Nitrogen
		Methane
		Water

0.5 points

QUESTION 15

Of Archaea, Bacteria, and Eukarya, which two are thought to be more closely related to each other than they are to the third?

		Bacteria and Eukarya
		Archaea and Bacteria
		Archaea and Eukarya

0.5 points

QUESTION 16

The increase in oxygen that occurred around 2.3 Ga is referred to as:

		The Snowball Earth
		The Permian Extinction
		The Cambrian Explosion
		The Great Oxidation Event
		Friday

0.5 points

QUESTION 17

A lophophore is:

		A feeding structure found in brachiopods and bryozoans.
		A reproductive structure found in annelids and molluscs.
		A photoautotroph.
		Available at Targetâ¢.
		Absent in all lophotrochozoans.

0.5 points

QUESTION 18

One of the main divisions of protostomes is:

		Electronica
		Cnidaria
		Eukarya
		Lophotrochozoa
		Deuterostomia

0.5 points

QUESTION 19

If, as some studies have suggested, Ctenophora is the sister-taxon to other metazoans, this would imply that:

		Poriferans are not animals.
		Cnidarians are not monophyletic.
		We are all hosed.
		Nervous systems evolved more than once, or were lost by Porifera.
		Ctenophorans are cnidarians.

0.5 points

QUESTION 20

The chambered shells of fossil cephalopods contribute to:

		Feeding.
		The Red Cross.
		Respiration.
		Control of buoyancy.
		Propulsion.

BIOL 112 Lecture Notes - Lecture 3: Proprioception, Esophagus, Parapodium

BIOL 112 Full Course Notes

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