BIO 242: EXAM 3 Complete Questions & Answers(Latest Update 2024)EXAM BUNDLE

Notochord - ANSWER A rod of tough, flexible material that runs the length of a creature's body, providing the majority of its support and attachment sites for muscles. Is replaced by the backbone in vertebrates. pharyngeal gill slits - ANSWER Slits open to the outside from the pharynx. Function ...

The left ventricular wall of the heart is thicker than the right wall in order to - ANSWER pump blood with greater pressure The P wave of a normal electrocardiogram indicates - ANSWER atrial depolarization Blood within the pulmonary veins returns to the - ANSWER left atrium The pain associa...

Tunicates (sea squirts) belong to the subphylum: a. Chordata b. Mammalia c. Craniata d. Urochordata e. Cephalochordata - ANSWER D) Tunicates belong to the subphylum Urochordata Lymphatic vessels are very similar in form and function to which of the following? a. Arteries b. Capillaries c....

muscle fiber - ANSWER a single skeletal muscle cell is known as a sarcoplasmic reticulum - ANSWER a modified endoplasmic reticulum that consists of a fine interconnected tubules surrounding each myofibril myosin - ANSWER thick filaments are assemblies of the protein cross-bridges - ANSWER t...

The interstitial fluids of humans have essentially the same composition of water and dissolved materials as: - ANSWER Lymph The blood found in the pulmonary vein of a mammal is: - ANSWER oxygenated Acquiring immunity from a primary immune response to an initial infection is an example of: - AN...

Which lines of defense would be considered nonspecific and innate? - ANSWER First line of defense Second line of defense Differentiate between components of first and second line defense - ANSWER FIRST:Physical and Chemical barriers SECOND: phagocytosis, inflammation, fever, antimicrobial prot...

What are Chordate general characteristics? - ANSWER Eucoelomate Bilateral Symmetry Deuterostomes Chordate functional homologies (4) - ANSWER Notochord Pharyngeal gill slits Dorsal, hollow, single nerve cord Post-anal tail Homology in chordates. A flexible rod running posteriorly from the ...

which of the following is NOT a category of endocrine gland stimulus? - ANSWER enzymatic which of the following is NOT a change typically produced by a hormonal stimulus? - ANSWER stimulates production of an action potential The ability of a specific tissue or organ to respond to the presence ...

In comparison to the systemic circuit, the pulmonary circuit _____. - ANSWER has lower resistance to blood flow the neurotransmitter that is released from the postganglionic fibers of the parasympathetic system is ___ which binds to the ____ receptors on the effector organs - ANSWER acetylocholin...

Suppose you take a drug that blocks your ability to secrete certain compounds in urine. What structures are most likely to be affected? - ANSWER Convoluted tubules You consume a large number of antacids due tooo acid upset; you are mimicking the actions of the ____ that also produces bicarbonates...

Pain impulses originating at nociceptors are transmitted to the CNS via - ANSWER Afferent fibers ________ receptors are useful in situations where it is important to signal a change in stimulus intensity rather than relay status quo information - ANSWER Tonic Each __________ sensory neuron res...

Origin of Parasympathetic NS + how many neurons in pathway? - ANSWER Brain stem or lateral horns of sacral spinal cord -2 neurons, post and preganglionic Origin of Sympathetic NS + how many neurons in pathway? - ANSWER Lateral horns of the thoracic and lumbar spinal cord -2 neurons, post and pr...

What molecules form the thick filaments within the muscle? - ANSWER Myosin What shape are actin molecules? - ANSWER Spherical What 2 molecules participate in cross-bridge interactions? - ANSWER Actin and myosin During muscle contraction, what becomes smaller? - ANSWER H-zone What are the...

The factor having the greatest influence on resistance to blood flow is the radius of the blood vessels - ANSWER true Resistance is lower in the pulmonary circuit than in the systemic circuit. - ANSWER true The more proteins in blood, the higher the blood viscosity. - ANSWER true The pressu...