nervous and immune systems presentation and answers...nervous system detects signals, transmits and...

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3/23/2016 1 Welcome to AP Biology Saturday Study Session Nervous and Immune Systems Question 1 d Clue: the most similar Various types of receptors have evolved to detect signals Electroreceptors Chemoreceptors Infrared receptors Mechanoreceptors Photoreceptors Thermoreceptors Question 2 d Clue: myelin Schwann cells are separated by gaps of unsheathed axon over which the impulse travels Question 3 b Clue: adding positive charge

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Page 1: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses

3/23/2016

1

Welcome to AP BiologySaturday Study Session 

Nervous and Immune Systems

Question 1

dClue: the most similar

Various types of receptors have evolved to detect signals

Electroreceptors

ChemoreceptorsInfrared receptors

MechanoreceptorsPhotoreceptors

Thermoreceptors

Question 2

dClue: myelin

Schwann cells are separated by gaps of unsheathed axon over which the impulse travels

Question 3

bClue: adding positive charge

Page 2: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses

3/23/2016

2

Question 4

cClue: find resting, depolarization and 

repolarization

Generation of Action Potential

1. 2.

3. 4.

K�

K�

K�

K�

Na�

Na�

Na�

Actionpotential

Axon

Plasma membrane

Cytosol

Actionpotential

Actionpotential

2

1

3

Conduction of Action 

Potential

Question 5

aClue: more acetylcholine and stimulatory

Transmission of information between neurons occurs across synapses

The response can be stimulatory or inhibitory

Page 3: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses

3/23/2016

3

Question 6

bClue: insects lack specific defense 

responses

Specific vs. Nonspecific Responses

Example of Non‐specific Defenses: 

Phagocytosis

Question 7

cClue: B cells produce antibodies

Humoral Immune Response

Cell‐mediated Immune Response

Page 4: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses

3/23/2016

4

Math Grid In 1

The correct answer: ‐72 mV

Solution:Summation = add

Starting membrane potential = ‐70 mVIPSP = ‐0.5 mV x 6 = ‐3.0 mVEPSP = 0.5 mV x 2 = 1.0 mV‐70 mV + (‐3.0 mV) + 1.0 mV = ‐72.0 mVNearest whole number = ‐72 mV

Short Free Response 14 points possible

Stimulus/Receptor Action (1 pt)• Stimulus (sound waves, pressure, etc.) producing an appropriate receptor 

action (eardrum vibrating, cochlear hairs vibrating or bending, etc.)Input/Sensory/Afferent (1 pt)• Signal direction toward the central nervous systemIntegration (1 pt)• Processing/Interpretation by CNS• Interneurons/Association/CommunicatingOutput/Motor/Efferent Response (1 pt)• Signal direction toward effectors or description of the response (e.g., increase 

in blood pressure or heart rate, muscle contraction; not just turning head)Possible Elaboration (1 pt)• Neural electrophysiology (e.g., action potential, neurotransmitters, synapse)• Neuron structure and impulse pathway• Sensory physiology

Nervous system detects signals, transmits and integrates information and produces responses

Reflex arcs produce fast responses due to no brain involvement Short Free Response 2

4 points possible

Identification – 1 pt Explanation – 1 ptPhysical barriers such asthorns and trichomes

Decrease grazing, prevent insect eggs from reaching epidermis

Chemical defenses such as production of distasteful or toxic compounds

Repel or damage tissues of herbivores

Physical barriers such as cell wall, epidermis and bark

Block pathogen entry

Chemical defenses such as hypersensitivity response and systemic acquired resistance 

Prevent spread of pathogen to healthy tissues, activate defense responses throughout the plant

Page 5: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses

3/23/2016

5

Hypersensitivity Response and 

Systemic Acquired Resistance 

Long Free Response 

Please see the rubric in the separate folder.

Page 6: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses
Page 7: Nervous and Immune Systems Presentation and Answers...Nervous system detects signals, transmits and integrates information and produces responses Reflex arcs produce fast responses