animal physiology (responding to stimuli -- muscle)

Question 1

Skeletal muscles is highly organized what are the 6 sections of it?

Answer 1

Muscle
Fascicle
Muscle Fiber
Myofibril
Myofilament
Sacromere

Question 2

what is the Sarcomere composed of?

Answer 2

Made of 2 protein myofilaments

Question 3

what is a thick filament is composed of?

Answer 3

several hundred molecules of the protein myosin

Question 4

what does a thin filament consists of?

Answer 4

2 intertwining strands of the protein actin

Question 5

what happens to the myosin and actin filaments during a muscle contraction?

Answer 5

These filaments slide over one another

the length does not change just the position of them in relation to each other

Question 6

what are the Three basic steps to a Muscle Contraction?

Answer 6

1. Electrical Excitation
2. Electrical – Mechanical Coupling
3. Sliding of the Filaments

Question 7

what are Monosynaptic Reflexes?

Answer 7

The processing of information without “using” the brain

reflexes are protective

Question 8

how does the information to react travel through the body?

Answer 8

comes from a sensory neuron then goes to the spinal cord and then to a motor neuron to react

Question 9

what are 2 examples of reflexes

Answer 9

1. Knee Jerk reflex

2. light response in flatworm