Muslces And Synapses L 6

Question 1

3 types of muscle

Answer 1

• smooth muscle
• cardiacs muscle
• Skeletal muscle

Question 2

Smooth muscle

Answer 2

Found in wall as of hollow organs of the body, contraction decreases the size of the strucure.

• regulates blood flow
• moves food through Gl tract
• regulates air flow through lungs

VOLUNTARY control

Question 3

Cardiac muscle

Answer 3

Strained muscle found in wall of the heart. Propels blood into the heart and through the blood vessels of the ciruculatory system

NOT VOLUNTARY control

Question 4

Skeletal muscle

Answer 4

Muscle attached to the Skelton. Contraction of skeletal muscle is VOLUNTARY control

Question 5

Skeletal muscles are electronically

Answer 5

Insulated form each other by endomysium

Question 6

In order for skeletal muscle to contract, each cell must bre stimulised b7y a process of a

Answer 6

Motor neuron

Question 7

Motor unit

Answer 7

Motor neuron, its axon, and all of the muscle fibres it activates. It is the functional unit of the motor system - it represents the smallest increment in force that can be generated.

Question 8

Differences b/w synaptic transmission at neuromusculator junction and a central synapse

Answer 8

1) one AP in motorneuron generates one AP in muscle cell (summation required in CNS)
2) each muscle fibres (cell) is only innervated by one presynaptic axon
3) no inhibitory transmitters released at N-M junction (so hows muscle action stopped?)

Question 9

Nueromascular junction activity

Answer 9

Release of acetylcholine NT contained within vesicle is released via exocytosis into synaptic cleft. Calcium ions plumped out of axon terminal.