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Exam #3 W 4/7 in class Review T 4/6 at 6-8pm in SZB 104. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. Fig 48.3. Responses can be release of hormones, change in cell activity, or muscle contraction. Response.

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Presentation Transcript
slide1
Exam #3 W 4/7 in class

Review T 4/6 at 6-8pm in SZB 104

slide2
Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response.

Fig 48.3

Responses can be release of hormones, change in cell activity, or muscle contraction

Response

slide3
Muscles can only contract. Therefore, two muscles are needed for each range of motion.

Fig 50.32

slide4
2 nerve signals for every movement:

excitatory and inhibitory

Fig 50.32

slide6
Excitatory neuro-transmitters released by motor neurons cause muscle cells to contract

Fig 50.29

slide7
Fig 50.25

Muscle cells are comprised of series of sarcomeres.

slide8
Fig 50.25

Each sarcomere is a repeating unit of actin and myosin proteins

slide9
Fig 50.25

As each sarcomere contracts, the muscle cell contracts

slide10
Neuro-transmitters released at nerve/

muscle junction cause calcium to be released in muscle

Fig 50.29

slide11
Fig 50.28

A third protein, tropomyosin controls when the muscle contracts

slide12
Fig 50.27

ATP provides the energy for myosin movement along the actin

slide16
E. coli

Phage virus

Ebola

Fungus from soil

various pathogens

the immune system
Specific:

B-cells -> antibodies

T-cells

The Immune System
  • Non-specific:
    • barriers

Fig 43.2

slide18
Non-Specific Immune System

Barriers:

Skin-

Dry

Inhospitable

Competition

Secretions (lysozyme)

Hairs and Mucus (protect openings)

Traps particles, swallowed

Stomach acid

kills pathogens

Fig 43.2

slide21
Hairs and Mucus (protect openings)

Traps particles

Stomach acid

kills pathogens

esophagus

stomach

slide22
Non-Specific Immune System

Barriers:

Skin-

Dry

Inhospitable

Competition

Secretions (lysozyme)

Hairs and Mucus (protect openings)

Traps particles, swallowed

Stomach acid

kills pathogens

Fig 43.2

the immune system1
Specific:

B-cells -> antibodies

T-cells

The Immune System
  • Non-specific:
    • barriers

Fig 43.2

slide26
B-cells develop in bone marrow

T-cells in the thymus

slide28
Variable region

An Antibody

Constant

region

Fig 43.10

slide30
B-cells male antibodies that bind to antigens marking them for destruction

Marked for

destruction

by WBC

Fig 43.19

slide33
SpecificImmuneSystem

Overview

Fig43.16

slide34
Exam #3 W 4/7 in class

Review T 4/6 at 6-8pm in SZB 104

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