Biol 106 exam 3 Spring 2004

1. Animals in the phylum Porifera are also called:

1. sponges
2. worms
3. jellyfish

1. Which of the following phyla DO NOT have radial symmetry:

1. Annelida
2. Ctenophora
3. Chordata

1. Annelids are:

1. non-segmented worms
2. have a coelom
3. are radial symmetric

1. Arthropods:

1. include crustaceans
2. are deuterostomes
3. lack an exoskeleton

1. Tunicates are:

1. protostomes
2. echinoderms
3. chordates

1. This type of ceolom formation, found in mollusks, annelids, and arthropods is characteristic of:

1. protostomes
2. echinoderms

C. chordates

1. Collagen:

1. is the least abundant protein in animals
2. has low tensile strength
3. has a lot of glycine and hydroxyproline

1. Large animals, like elephants:

1. have relatively light skeletons
2. have relatively heavy skeletons
3. have difficulty breaking the surface tension of water

1. How long does it take for gas to diffuse in water over a distance of one millimeter?

1. 100 seconds
2. 10 seconds
3. 1 second

1. Which size of spherical sea organism can rely on diffusion across its outer surface for gas exchange?

1. 1 millimeter diameter organism
2. 1 centimeter diameter organism
3. 1 meter diameter organism

1. Which organism has the highest surface area relative to volume (total surface area divided by total volume)?

1. 1 millimeter diameter organism
2. 1 centimeter diameter organism
3. 1 meter diameter organism

1. Cnidarians like sea anemones and jellyfish increase their surface area using:

1. the gastrovascular cavity
2. the coelom
3. nematocysts

1. The structures of the fish gill that increase surface area are:

1. gastrovascular cavity, tentacles, microvilli
2. villi, microvilli, brush border
3. filaments and lamellae

1. Why does blood flow in the opposite direction to capillary flow in the fish gill?

1. to increase nutrient exchange
2. to maximize oxygen uptake
3. this is the only direction of flow that is possible

1. The diffusion of oxygen to the capillaries in the vertebrate lung occurs in the:

1. tracheoles
2. bronchi
3. alveoli

1. The pathway of air in the flow through bird lung is:

1. mouth, posterior air sac, lung, anterior air sac, mouth
2. mouth, lung, posterior air sac, mouth
3. mouth, lung, mouth

1. The picture above is of:

1. a frog lung
2. an insect tracheal system
3. a fish lung

1. In the picture above, air enters the animal through the:

1. spiracle
2. ostea
3. sinus

1. These animals have two chambered hearts:

1. fish
2. amphibians
3. crocodiles

1. Which cardiovascular system does not pump fully oxygenated blood to the systemic capillaries:

1. 2 chambered heart
2. 3 chambered heart
3. 4 chambered heart

1. Arteries by definition contain oxygenated blood:

1. true
2. false

1. Digestion in food vacuoles is a way of avoiding:

1. self digestion
2. food poisoning
3. the runs

1. In the human stomach, food (primarily protein) is broken down by:

1. pepsin
2. hydrochloric acid
3. mechanical churning
4. all of the above

1. Which of the following are inactive digestive enzyme precursors:

1. pepsinogen
2. trypsin
3. chymotrypsin

1. Which of the following is likely to have the largest absorptive surface area in humans?

1. stomach
2. small intestine
3. large intestine

1. Where does cellulose digestion occur in herbivores like rats and koalas

1. stomach
2. cecum
3. small intestine

1. The digestive system above is most likely from a:

1. carnivore
2. omnivore
3. herbivore

1. insulin is:

1. produced by the liver
2. a peptide (amino acid derived) hormone
3. used to make blood glucose increase

1. corticosteriods are:

1. produced by the adrenal cortex
2. peptide hormones
3. used to make blood glucose decrease

1. epinephrine (or adrenaline) causes

1. increased blood pressure
2. decreased glucose levels
3. decreased respiration

1. Animals in the phylum nematoda:

1. are radially lateral
2. pseudocoelomates
3. deuterostomes

1. Which of the following animals has an open circulatory system:

1. earthworm
2. fish
3. insect

1. To regulate blood glucose levels, glucose is stored as:

1. glycogen in the liver cells
2. glucagon in the body cells
3. insulin in the pancreas

1. Which of the following can be digested by salivary amylase in the mouth

1. starch
2. protein
3. fats

1. The part of the neuron that receives signals is called:

1. dendrite
2. axon
3. node of Ranvier

1. In long-term stress:

1. releasing hormone is produced by the adrenal cortex
2. ACTH is secreted (released) by the anterior pituitary
3. ACTH is secreted by the hypothalamus

1. Vitamin C (ascorbate) is necessary for:

1. production of collagen with a normal melting temperature
2. cellulose breakdown
3. breaking the surface tension of water

1. The gastric gland produces

1. epinephrine
2. mucus, pepsinogen, hydrochloric acid
3. cellulase

1. In tidal ventilation:

1. all of the air is replaced in the lung with each breathing cycle
2. only some of the air is replaced in the lung with each breathing cycle
3. air is pushed into the lung with positive pressure.